The wireless technology that influences the spectral efficiency of 4G and 5G wireless communication services, reduces interference, and increases the channel robustness is option D:mimo-ofdm
What is the wireless communication services?MIMO-OFDM is a wireless communication technology that uses multiple antennas at both the transmitter and receiver ends of a communication link to improve the data rate, reliability, and spectral efficiency of wireless communications.
Therefore, It combines the advantages of MIMO (Multiple Input Multiple Output) and OFDM (Orthogonal Frequency Division Multiplexing) technologies, allowing for the transmission of multiple data streams simultaneously over the same frequency band. This enables higher data rates and more reliable wireless communication with reduced interference and increased channel robustness.
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lisa is shopping for a pc that she can take with her to school. she would like a portable pc with a usb port so that she can plug in external devices. which computer fits lisa's computer needs? select your answer, then click done.
Lisa's computer needs can be met by purchasing a laptop with a USB port. This type of computer is portable and can be taken with her to school, and the USB port will allow her to plug in external devices such as a keyboard, mouse, external hard drive, etc.
When shopping for a laptop, it is important to consider the type of processor, RAM, storage, and display. Processors can range from the budget-friendly Celeron and Pentium to the more powerful Core i3, i5, and i7 models. RAM and storage size will vary by model, but it is important to get enough RAM to handle multitasking and enough storage space to store documents, photos, music, and videos.
When considering the display, a larger display will make it easier to see what is on the screen, but it will also make the laptop heavier and more difficult to transport. It is also important to consider the brand and quality of the laptop, as well as warranty and customer service options.
In addition, there are many accessories that can be purchased to enhance the laptop's performance and usability, such as a carrying case, mouse, external hard drive, and more. Other options including Supercomputer, personal computer, and microcomputer are incorrect. The best type of computer containing all desired features is Laptop.
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abigail needs to move out of state to take care of her mother. she will need secure remote access to continue working as a cloud engineer. what type of connection does abigail need to securely access the computing resources at her company?
Abigail will need a Virtual Private Network (VPN) connection to securely access the computing resources at her company.
A VPN connection allows remote users to securely access a private network over the public internet. With a VPN connection, Abigail can connect to her company's network from her remote location as if she were physically present in the office.
The VPN connection creates a secure and encrypted tunnel between Abigail's computer and the company's network, protecting her communications and data from unauthorized access. This ensures that Abigail can securely access the company's computing resources, such as servers, applications, and databases, without exposing them to potential security risks on the public internet.
Overall, a VPN connection is a secure and reliable way for remote workers to access corporate resources from a remote location.
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a data dictionary can be used to: a.record the database structure. b.encrypt the data. c.schedule tasks in projects. d.monitor performance.
A data dictionary can be used to record the database structure. So, the correct option is A.
A data dictionary is a software component that stores metadata about the data in a database system. A data dictionary is a source of documentation for an application, including information about schema objects such as tables, columns, and indexes, as well as integrity constraints, and system-level information like privileges and roles.
A data dictionary can be used for the following purposes:
To maintain information about the schema objects in the database system, including tables, columns, and indexes.To enforce consistency in the use of schema objects throughout the application development process.To enhance performance by providing information about the database system to the query optimizer.To provide application developers with a source of metadata about the database system that can be used to generate documentation automatically.To enhance security by providing information about access privileges and security-related objects such as roles and profiles.You can learn more about data dictionary at: brainly.com/question/8897251
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an encryption algorithm is designed to operate on blocks from the plaintext, and put them through a series of substitution and permutations. what is this called?
Answer: The process of encrypting blocks of plaintext by putting them through a series of substitution and permutation operations using a specific encryption algorithm is called a block cipher.
Block ciphers operate on fixed-length groups of bits, or blocks, and transform them into the same-sized blocks of ciphertext. The block cipher takes a block of plaintext as input, performs a series of substitution and permutation operations according to a secret key, and outputs a block of ciphertext. The same key is used to encrypt and decrypt the data.
Block ciphers are commonly used in symmetric-key encryption algorithms such as AES (Advanced Encryption Standard) and DES (Data Encryption Standard).
Explanation:
what is the this keyword used to reference? the this keyword references the method that was called. the this keyword references the current class. the this keyword references the object that called the method. the this keyword references the instance variable that a local variable shadows.
Answer:
The "This Key"
Explanation:
This is how we reference it because it normally helps any confusion. (I might be wrong)
The "this" keyword in object-oriented programming refers to the current object or instance of a class. It is a reference to the object that the method was called on or the object that is currently being constructed. Therefore, the final answer is that the this keyword references the object that the method was called on.
When used within an instance method or constructor of a class, the this keyword is used to refer to the current object, i.e., the object on which the method or constructor is being invoked. This can be useful, for example, when there is a need to distinguish between an instance variable and a local variable that has the same name. Therefore, the correct answer to the question is: "The this keyword references the object that the method was called on."
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what is the most common topology and technology combination in use today? a.logical bus / ethernet b.switched / ethernet c.logical ring / token ring d.logical bus / wireless lan
The most common topology and technology combination in use today is switched/Ethernet. So, the correct option is B.
Ethernet is a networking technology that allows devices to communicate with one another. It's a wired networking standard that is frequently used in local area networks (LANs). Ethernet is the most widely used networking technology. A switched network, on the other hand, is a network that uses switches to connect devices together.
The most common topology and technology combination in use today is switched/Ethernet. This is because it is a widely used networking technology that is commonly found in LANs, and it is also reliable and efficient. A switched network uses switches to connect devices together, which makes it more efficient than other types of networks, such as a bus or a ring.
Furthermore, Ethernet is widely used because it is simple to use, easy to install, and cost-effective. Switched networks are often used in enterprise environments, where they are used to connect multiple devices together in a single network.
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what new feature in server 2016 provides a light-weight server geared toward use on virtual machines?
The new feature in Server 2016 that provides a light-weight server geared toward use on virtual machines is called "Nano Server".
Nano Server is a minimalistic version of Windows Server 2016 that is designed specifically for running cloud-based applications and optimized for use in virtualized and containerized environments. It is a lightweight and low-maintenance option that can be used to run Hyper-V clusters, scale-out file servers, and other cloud-based workloads.
Nano Server has a smaller footprint than other versions of Windows Server 2016, with no GUI or local logon capability. This makes it more secure and easier to manage remotely. Nano Server is also designed to be updated and managed using remote management tools like PowerShell, Windows Management Instrumentation (WMI), and Desired State Configuration (DSC).
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which ieee 802.11 phy technology specifies an 80 mhz wide channel for transmitting and receiving data?
The IEEE 802.11ac PHY technology specifies an 80 MHz wide channel for transmitting and receiving data.
IEEE 802.11 PHY (Physical Layer) technology is a Wireless LAN (WLAN) networking protocol that enables Wi-Fi-enabled devices to connect to the internet.
The IEEE 802.11 PHY layer specifies the radio signal transmission characteristics that are used to transfer data between devices. PHY 802.11 standards specify that the protocol for wireless networks should operate in the 2.4 GHz or 5 GHz frequency ranges. It uses various transmission schemes such as direct-sequence spread spectrum (DSSS), frequency-hopping spread spectrum (FHSS), and orthogonal frequency-division multiplexing (OFDM).802.11ac PHY Technology IEEE 802.11ac is the latest and most advanced wireless networking standard to date. The standard is capable of providing high-speed data transmission using a minimum of four multiple-in/multiple-out (MIMO) spatial streams. This standard provides more channels and wider bandwidths, enabling data transmission rates of over one gigabit per second (Gbps) to be achieved. The IEEE 802.11ac PHY technology specifies an 80 MHz wide channel for transmitting and receiving data.Learn more about technology visit:
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Which type of IP address is used within a private network (LAN)? (5 points)
Network
Private
Public IP
VPN
Explanation:
A private IP address is used within a private network to connect securely to other devices within that same network
lattice-based access control specifies the level of access each subject has to each object, if any. question 2 options: true false
The given statement, "lattice-based access control specifies the level of access each subject has to each object if any" is true.
Lattice-based access control refers to a security policy that restricts access control to a set of pre-defined policies. In the field of computer security, this is often used as a formalism for defining and enforcing a security policy.
It is a well-known and well-regarded theory that is widely utilized in access control policies for information systems. The lattice model is based on two main components: security levels and clearance levels.
The security levels refer to the relative security requirements of various components of the system, while clearance levels refer to the authorization levels of various users.
Both security levels and clearance levels are organized into a lattice structure, with the most restrictive level at the top and the least restrictive level at the bottom.
In this structure, each object has an assigned security level, and each subject has an assigned clearance level. Each subject may access any object whose security level is equal to or less restrictive than the subject's clearance level.
Therefore, the statement "lattice-based access control specifies the level of access each subject has to each object if any" is true.
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to increase security of data stored on an rodc, what can be configured to specify domain objects that aren't replicated to rodcs?
To increase the security of data stored on an RODC, the domain objects that are not replicated to RODCs can be configured. This can be achieved by specifying domain objects that are not replicated to RODCs.
A read-only domain controller (RODC) is a domain controller that stores a copy of an Active Directory database. An RODC is usually used in locations where network security is poor or non-existent. This ensures that even if the RODC is compromised, the security of the entire network is not jeopardized.
Active Directory consists of the following types of domain controllers:
Domain controllers that are read-write (RWDC)Domain controllers that are read-only (RODC)RODCs are used to secure remote sites, such as branch offices or retail stores, that have low physical security or inadequate network infrastructure.An RODC is a new category of the domain controller that has been introduced to improve security at remote locations. The primary function of an RODC is to cache user passwords. The use of an RODC will not be able to modify user passwords, computer accounts, or domain metadata stored on RWDCs to ensure that the RODC is secure.
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what specific windows defender policy setting will allow you to disable scanning and real-time protection for specific files or all files in specified folders?
Answer:here is the answer below
Explanation: The specific Windows Defender policy setting that allows you to disable scanning and real-time protection for specific files or all files in specified folders is called "Exclude files and folders from scanning" policy. This policy setting can be found in the Windows Defender Antivirus policy, which is located in the Group Policy Editor under Computer Configuration > Administrative Templates > Windows Components > Microsoft Defender Antivirus > Scan.
When you enable this policy and specify the files or folders to exclude, Windows Defender Antivirus will not scan those files or folders for threats and will not provide real-time protection for them. This can be useful in situations where you have files or folders that are known to be safe and you don't want them to be scanned unnecessarily, or if you have a particular application that requires exclusion from scanning to function properly.
which software forensic tool offers blade, hstex, and netanalysis.blade, is a windows-based data recovery solution, and supports plug-ins that give it advanced data recovery and analysis capabilities?
Blade, hstex, and netanalysis are available through the software forensic tool. Digital Detective, a windows-based data recovery programme, enables plug-ins that enhance its superior data recovery and analysis abilities.
What are the options for data recovery?Restoring lost, damaged, inadvertently deleted, or otherwise inaccessible data to a server, computer, mobile device, or storage device is known as enterprise data recovery (or to a new device if the original device no longer works).Data loss is expensive, and data recovery is even more expensive. The sad consequence of data loss is the cost of data recovery. Yet one thing is certain: the cost of losing data is much higher than the expense of recovering it. A business may have to shut down due to lost data. Cold, warm, and hot sites are the three main categories of disaster recovery locations that can be used.To learn more about data recovery, refer to:
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what is the most secure option for the type of passcode that can be entered to access a mobile device?
The most secure option for the type of passcode that can be entered to access a mobile device is a complex alphanumeric password.
This is because it involves the use of letters, numbers, and symbols, making it more difficult to guess or crack. It is important to avoid using common passwords or passcodes such as "1234" or "password" as they can be easily guessed. Additionally, it is recommended to change the passcode frequently to prevent unauthorized access to the device. Important factor in the security of a mobile device passcode is how it is stored and encrypted. It is recommended that the passcode is stored securely on the device using strong encryption techniques, such as AES-256.
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most of the visibility problems that occur at airports, which can suspend flights and even close airports, are caused by
fog is the reason which causes Most of the visibility problems that occur at airports, which can suspend flights and even close airports.
Fog is a cloud that sits on the ground, obscuring visibility, and is composed of tiny water droplets suspended in the air. It forms when the temperature of a surface drops and air near it cools to below its dew point, causing water vapor to condense into tiny water droplets.
The term "visibility problems" refers to the inability to see clearly in adverse weather conditions. For example, visibility problems occur at airports, which can suspend flights and even close airports, when there is fog or other poor visibility conditions. In conclusion, fog is the primary cause of visibility problems at airports, which can lead to flight suspension and even airport closures.
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today, most data kept by companies is stored in databases. when might it be appropriate to use text files? describe the steps that must be taken when a data file is used by a program?
Today, most data kept by companies is stored in databases. However, there are some cases where text files are appropriate.
It may be appropriate to use text files when the data needs to be easily shared and edited by multiple users without the use of a database. Additionally, text files may be used in smaller projects or for temporary storage. For example, a configuration file for a program may be stored as a text file. Steps that must be taken when a data file is used by a program are:
Open the file for reading or writing: This step is performed to give the computer access to the file and ensure that the file is properly read or written.
Read or write to the file: This is the step where data is either read from or written to the file. This data can be manipulated or processed by the program.
Close the file: Once the program is finished with the file, it should be properly closed to free up resources and ensure the file is saved correctly.
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Which of the following attacks targets the external software component that is a repository of both code and data?
Application program interface (API) attack
Device driver manipulation attack
Dynamic-link library (DLL) injection attack
OS REG attack
The attack that targets the external software component that is a repository of both code and data is the C: Dynamic-link library (DLL) injection attack.
A Dynamic-link library (DLL) injection attack is a type of cyber attack that targets external software components known as DLLs, which are repositories of code and data that are shared among different programs. The attack involves injecting malicious code into the DLLs, which can then be executed whenever the DLL is loaded into memory. This type of attack can be used to take control of a system or steal sensitive information.
DLL injection attacks are particularly effective because they can bypass traditional security measures, such as firewalls and antivirus software. To prevent these attacks, it is essential to implement security measures that detect and block unauthorized DLL injections.
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when you click the autosum button, excel automatically inserts a formula with the sum function, using the range of mostly likely cells based on the structure of your worksheet. which scenario would you use the sum function for?
The SUM function in Excel is used to add up a range of values in a worksheet. You would typically use the SUM function in Excel when you need to calculate the total of a set of numbers, such as when you are working with financial data, inventory data, or any other data that requires adding up a group of values.
For example, if you have a column of sales data for different products, you can use the SUM function to quickly calculate the total sales for all products. Similarly, if you have a row of expenses for different categories, you can use the SUM function to calculate the total expenses for the period.
The SUM function is a versatile tool that can be used to perform basic calculations as well as more complex ones. It can be used on its own or in combination with other functions and formulas to create more advanced calculations.
Overall, if you need to add up a range of values in your Excel worksheet, the SUM function is likely the best option to use.
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in a failover cluster, what are the options for configuring the quorum model? (choose all that apply.)
There are three options for configuring the quorum model in a failover cluster: Node Majority, Node and Disk Majority, and Node and File Share Majority. So. the correct option is all of these.
In a failover cluster, there are several options for configuring the quorum model. These include:
Node Majority: This quorum model uses a majority of the cluster nodes, so at least half of the nodes must be online and functional for the cluster to stay up.
Node and Disk Majority: This quorum model uses a combination of cluster nodes and disks. All the nodes and a majority of the disks must be online for the cluster to stay up.
Node and File Share Majority: This quorum model uses a combination of cluster nodes and a designated file share witness. All the nodes and the file share must be available for the cluster to stay up. All of these options require a majority of nodes to be online and functional in order for the cluster to stay up.
So, the correct option is All of these as Node Majority, Node and Disk Majority, and Node and File Share Majority are required for configuring the quorum model.
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If you are experiencing display problems on your computer, which of the following troubleshooting techniques might you attempt first?a. Contact a professional for assistance.b. Replace the cables.c. Check to see that all cables are properly connected.d. Purchase a new monitor.
If you are experiencing display problems on your computer, the troubleshooting technique you might attempt first is checking to see that all cables are properly connected. The correct option is C.
If you are experiencing display problems on your computer, the first troubleshooting technique to attempt would be to check that all cables connecting the monitor to the computer are properly connected. This includes the power cable, video cable (such as VGA, DVI, or HDMI), and any other cables or adapters that may be used.
If the cables are not properly connected, this can cause a variety of display problems, including a blank screen, fuzzy or distorted images, or no signal detected by the monitor.
If checking the cables does not solve the problem, then you could try other troubleshooting techniques such as updating the video drivers, adjusting the display settings, or testing the monitor on another computer. Only if none of these methods solve the problem would it be appropriate to contact a professional for assistance or consider purchasing a new monitor.
Thus, option C is the correct answer.
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what new feature in windows server 2016 will allow up to eight identical physical adapters on the host system to be configured as a team and mapped to a virtual switch?
The new feature in Windows Server 2016 that allows up to eight identical physical adapters on the host system to be configured as a team and mapped to a virtual switch is called NIC Teaming.
NIC stands for Network Interface Card. NIC Teaming allows you to bundle several physical network interfaces together to form a single logical interface that provides fault tolerance and high-speed links.
By configuring multiple physical adapters as a team, you can increase the network bandwidth and provide redundancy in case a network adapter fails.
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the integer data member thesize of class vector is strictly speaking optional. it adds to the efficiency of various operations, but if it were missing from the class, the size of the array of data values could always be determined by counting while iterating over the array. True or False
The given statement "the integer data member thesize of class vector is strictly speaking optional. it adds to the efficiency of various operations, but if it were missing from the class, the size of the array of data values could always be determined by counting while iterating over the array" is true because while the thesize data member of the vector class is used to efficiently store and retrieve the size of the vector, it is not strictly necessary for the functioning of the class..
What is the Vector?In C++, a vector is a data structure that stores a collection of items. It is similar to an array, except it may be dynamically resized. In C++, vectors are used to store data in sequential order.
Iterators are used to access the elements of a vector, which are stored in contiguous memory. The operator[] must be used to access the vector's elements.
The vector::push back() and vector::pop back() methods can be used to increase or reduce the size of a vector. The class vector's integer data element "thesize" is absolutely optional.
It improves the performance of several operations, but if it is not included in the class, the size of the array of data values can always be obtained by counting while iterating through the array. It is true
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6 how many bits per baud can we send in each of the following cases if the signal constellation has one of the following number of points? a. 2 b. 4 c. 16 d. 1024
The number of bits per baud that can be sent in each of the following cases is determined by the number of points in the signal constellation. a. For a constellation with 2 points, there is 1 bit per baud. b. For a constellation with 4 points, there are 2 bits per baud. c. For a constellation with 16 points, there are 4 bits per baud. d. For a constellation with 1024 points, there are 10 bits per baud.
Each point in the constellation represents a unique symbol that can be transmitted. The number of bits per baud is equal to the base-2 logarithm of the number of points in the constellation.
If the signal constellation has 2 points, then each baud can send 1 bit of information.
If the signal constellation has 4 points, then each baud can send 2 bits of information.
If the signal constellation has 16 points, then each baud can send 4 bits of information.
Finally, if the signal constellation has 1024 points, then each baud can send 10 bits of information.
To sum up, the number of bits per baud that can be sent in each of the following cases is determined by the number of points in the signal constellation: 1 bit for 2 points, 2 bits for 4 points, 4 bits for 16 points, and 10 bits for 1024 points.
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what are the potential issues with building redundancy?
While redundancy can improve reliability and availability, it also comes with potential issues. These include increased costs, added complexity, and the risk of cascading failures.
1. Increased Costs: Implementing redundancy often requires additional investment in equipment, infrastructure, and maintenance. This can lead to higher initial and ongoing expenses, which may not be affordable for all organizations.
2. Added Complexity: Introducing redundancy can make a system more complex to design, implement, and manage. This can result in additional training, support, and administration resources, potentially decreasing efficiency and productivity.
3. Cascading Failures: In some cases, redundant components may not function as expected, causing a cascading failure in the system. This can occur when a single point of failure triggers a series of subsequent failures in other components, potentially leading to a complete system breakdown.
4. Overconfidence: Relying on redundancy can create a false sense of security, causing organizations to neglect regular maintenance and system monitoring. This can lead to undetected issues that may eventually result in system failures.
5. Inefficient Resource Utilization: Redundancy can lead to underutilization of resources, as redundant components are often idle during normal system operation. This can result in wasted energy, space, and financial resources.
6)In summary, while redundancy can be beneficial in maintaining system reliability and availability, it is important to consider the potential issues associated with its implementation. Organizations should weigh the benefits and risks before implementing redundancy in their systems.
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if you want to create a click-to-call feature in your mobile site for smartphone users, which protocol should you use to create a phone link
The protocol you should use to create a click-to-call feature for smartphone users on a mobile site is called tel.
The tel protocol is used to create a link on a web page that will trigger a phone call when tapped or clicked on by a user. When a user clicks on the tel: link, their phone will prompt them to dial a specific phone number. To create a tel: link, you need to include the phone number in the link, like this: 555-123-4567. This link will create a click-to-call feature that will initiate a phone call to the number when clicked. By using the tel: protocol, you can make it easy for mobile users to contact you with a simple tap of the screen.
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90.7% complete question which of the following conditions are results of a syn (synchronize) flood attack? (Select all that apply.)A. Packet filteringB. Resource exhaustionC. Denial of service (DoS)D. Amplification
The following conditions are the result of a syn (synchronize) flood attack: Denial of service (DoS), Packet filtering, and Resource exhaustion.
What is a flood attack?A flood attack is a type of cyberattack that aims to incapacitate a network or web server by overwhelming it with a large volume of traffic. It is one of the most common types of cyberattacks, and it is commonly used to execute Denial of Service (DoS) assaults on target systems, resulting in resource exhaustion and eventual failure.
The attacker directs a large number of SYN packets to the target in an SYN flood attack. The aim of these attacks is to clog up a network or server's processing capacity by forcing it to synchronize with a high volume of requests. This effectively renders the target system unavailable, causing the user to experience resource exhaustion and eventual failure. The condition of packet filtering is also the result of a syn flood attack.
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help i don't know the answer
A test bed is an environment with all the necessary hardware and software to test a software system or component.
What is meant by hardware and software?The term "hardware" describes the actual, outward-facing parts of the system, such as the display, CPU, keyboard, and mouse. Contrarily, software refers to a set of instructions that allow the hardware to carry out a certain set of activities.RAM, ROM, Printer, Monitor, Mouse, Hard Drive, and other items are some examples of hardware. Software examples include, MySQL, Microsoft Word, Excel, PowerPoint, Notepad, Photoshop, and more.System software, utility software, and application software are some of the numerous kinds of software that can be used with computers.Office suites, graphics software, databases, database management software, web browsers, word processors, software development tools, image editors, and communication platforms are some examples of contemporary applications. software for a system.To learn more about hardware and software, refer to:
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which of the following is true about international style? a.) international style has symmetrical balance. b.) international style uses rigid typographic grids. c.) international style uses serif typefaces.
Among the given options, the only true statement about the international style is that it uses a rigid typographic grid (option b). The international style is a design movement that emerged in the 1920s and 1930s, characterized by simplicity, minimalism, and functionality.
It is often associated with architecture and industrial design, but it also influenced graphic design. In terms of graphic design, the international style is known for its use of sans-serif typefaces, asymmetrical layouts, and an emphasis on hierarchy and legibility. The use of a rigid typographic grid is also a common characteristic of the international style, as it helps to create a sense of order and consistency in the design. However, symmetrical balance is not a defining feature of the international style, and it often employs asymmetrical layouts for a more dynamic and modern look. Similarly, the international style typically favors sans-serif typefaces over serif typefaces.
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Car batteries have two terminals, which are _____.
Answer: Positive and negative
Explanation:
A car batter works just like a 9 volt battery but it gives off more power and has a different structure .
the general control area of systems development and program change does not have an impact on day-to-day transaction processing. a. true b. false
The given statement "The general control area of systems development and program change does not have an impact on day-to-day transaction processing." is FALSE.
What is a transaction in computer science?
A transaction is a program or function that reads or modifies data items in a database. A transaction is a discrete unit of work that can execute multiple operations on a database. Transactions ensure that a database system remains in a consistent state regardless of concurrent user access and data modification requests. Therefore, in the day-to-day transaction processing, systems development and program change have a significant impact.
Hence, the given statement "The general control area of systems development and program change does not have an impact on day-to-day transaction processing." is FALSE. This is because the changes to the system, such as updates and modifications, can change how a transaction is processed and how data is stored. Additionally, new programs and development can introduce new features to the system which can impact how transactions are processed.
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