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| Section | Objectives |
|---|---|
| Networking & Internet Fundamentals | - Network Concepts
|
| Data, Databases & Information Systems | - Data Concepts
|
| IT Roles, Governance & Professional Practices | - Governance & Processes
|
| Cybersecurity & Emerging Technologies | - Security Fundamentals
|
| Computer Hardware & Software Fundamentals | - Computer Components
|
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NEW QUESTION # 138
What is the generation of computing known for the introduction of electronic components that could maintain exactly two states?
Answer: D
Explanation:
The phrase electronic components that could maintain exactly two states refers to digital switching behavior, where a device reliably represents binary values such as 0 and 1. In standard computing history, the second generation is recognized for introducing transistors as the key electronic component replacing vacuum tubes.
Transistors are solid-state switching devices that can operate in two stable states, commonly described as on and off, which aligns directly with binary logic used in digital systems. This made computing hardware more compact, faster, and more reliable than first-generation systems, which relied on vacuum tubes that were bulky, generated significant heat, and failed more often. Transistors also consumed less power, enabling longer operating times and improved machine stability. These improvements helped expand computer usage in business and scientific environments and supported better programming tools, including early high-level languages. While earlier systems also used binary logic, the defining generational shift for stable, efficient two-state solid-state components is the transistor era. Therefore, the correct generation is the second generation.
NEW QUESTION # 139
An employee needs to execute a program from the command line.
Which peripheral device should be used?
Answer: A
Explanation:
1.Keyboard Input:
oWhen executing a program from the command line, the keyboard plays a crucial role in providing input to the system.
oThe user types the command or program name using the keyboard, and the operating system interprets these inputs.
oThe keyboard allows the user to interact with the command-line interface (CLI) by entering commands, parameters, and options.
2.Command-Line Execution:
oTo execute a program, the user types the program's name (or its full path) followed by any necessary arguments or options.
oThe operating system processes this input and runs the specified program.
oFor example, to run a Python script named "my_script.py," the user would type:
opython my_script.py
3.Other Peripheral Devices:
oLet's briefly discuss the other options:
Hard Drive (B): The hard drive is a storage device and is not directly involved in executing programs from the command line. It stores files and data but does not execute them.
Speaker : The speaker is an output device used for audio playback. It does not play a role in executing programs.
Printer (D): The printer is an output device used for printing documents. It is not used to execute programs.
References:
*No specific document reference is provided for this basic concept, as it is widely accepted knowledge in the field of information technology.
NEW QUESTION # 140
Based on an analysis of a company's needs, a database should be installed so that data resides on different machines, often in entirely different locations. What is the name of the database that satisfies this need?
Answer: A
Explanation:
A distributed database is a database in which data is stored across multiple computers or servers rather than in a single central location. These machines may be in the same building, across a campus, or in different geographic regions. In Information Technology and database design, distributed databases are used to improve availability, fault tolerance, scalability, and performance by placing data closer to users and by reducing reliance on one server. The distributed database management system coordinates storage, replication, and query processing so that users can access data as if it were a single database, even though it is physically spread out. This model supports business continuity because if one site fails, another site can continue serving requests depending on the replication strategy. Relational and NoSQL describe data models and query approaches, while cloud describes a deployment environment that can host many types of databases, including distributed ones. Because the defining requirement here is data stored on different machines and locations, the correct answer is a distributed database.
NEW QUESTION # 141
Which component of an operating system allows the operating system to run applications?
Answer: B
Explanation:
The kernel is the core component of an operating system that enables applications to run by managing system resources and providing essential services. In Information Technology, applications do not directly control the CPU, memory, or hardware devices. Instead, they request services from the operating system through system calls, which are handled by the kernel. The kernel manages process creation and execution, memory allocation, multitasking, and communication between software and hardware. It also enforces protection and security boundaries so one program cannot easily interfere with another or with the operating system itself.
The user interface affects how users interact with the system, but it is not the component that actually runs programs. The file manager handles organization and access to files, and drivers allow the operating system to communicate with specific hardware devices, such as printers and network cards. Because the kernel controls process execution and resource management, it is the operating system component that allows applications to run.
NEW QUESTION # 142
What is a role of the network architect?
Answer: A
Explanation:
A network architect is a professional responsible for designing and implementing computer networks that meet the needs of an organization. Here are the key aspects of their role:
1.Designing Networks: Network architects create network infrastructures that support an organization's goals.
They work with both hardware and software components to plan and design data communication networks.
These networks can range from smaller local area networks (LANs) to larger wide area networks (WANs) and intranets.
2.Installation and Implementation: Once the network design is complete, network architects oversee the installation and implementation process. They ensure that routers, modems, cables, and other necessary hardware and software are properly set up. They also determine the layout of network components within buildings or across cities and countries.
3.Security Management: Network architects play a crucial role in managing information and network security.
They implement security measures to protect the network from unauthorized access, data breaches, and other threats.
4.Upgrades and Maintenance: These professionals continuously monitor the network's performance and assess future needs. They perform upgrades to hardware and software as required. Regular maintenance and minor repairs are essential to keep the network operating smoothly and avoid downtime.
5.Documentation: Network architects maintain thorough documentation of networks, including drawings, descriptions, and configurations. This documentation helps ensure efficient management and troubleshooting.
6.Communication and Collaboration: Network architects often work alongside IT specialists and communicate with management staff. They use their understanding of the organization's business goals to develop network systems that align with those objectives.
References:
*1Indeed: What Is a Network Architect?
*2Glassdoor: What does a Network Architect do? Role & Responsibilities
*3CareerExplorer: What does a network architect do?
*4Field Engineer: Network Architect Job Description & Salary
NEW QUESTION # 143
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