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| Section | Objectives |
|---|---|
| Topic 1: Networking & Internet Fundamentals | - Network Concepts
|
| Topic 2: IT Roles, Governance & Professional Practices | - IT Careers
|
| Topic 3: Data, Databases & Information Systems | - Databases
|
| Topic 4: Computer Hardware & Software Fundamentals | - Software Systems
|
| Topic 5: Cybersecurity & Emerging Technologies | - Emerging Tech & Ethics
|
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NEW QUESTION # 119
What translates and executes source code into machine language one line at a time?
Answer: A
NEW QUESTION # 120
What is one example of a professional organization in the IT industry?
Answer: D
Explanation:
Computer Professionals for Social Responsibility is an example of a professional organization in the IT industry. Professional organizations are generally membership-based groups that support practitioners through community, publications, conferences, ethical guidance, and advocacy related to professional practice. CPSR historically focused on the social and ethical impacts of computing, encouraging responsible technology use and informed public policy discussion. By contrast, the National Security Agency is a government intelligence and cybersecurity agency, the Institute for Telecommunication Sciences is a U.S. government research organization under the Department of Commerce, and the Federal Communications Commission is a government regulatory body overseeing communications. Those entities may influence IT and telecommunications, but they are not professional membership organizations in the standard sense used in IT fundamentals coursework. Professional organizations often provide networking opportunities, professional development resources, and codes of ethics or best-practice guidance for members. Therefore, among the options given, CPSR is the correct example of a professional organization in the IT industry.
NEW QUESTION # 121
Which generation of computing is known for the use of operating systems to allow for shared memory and resources?
Answer: C
Explanation:
The third generation of computing is known for major advances in operating systems, especially the move toward multiprogramming, time-sharing concepts, and improved resource management. During this era, computers became powerful enough to support operating systems that could coordinate multiple programs and users more effectively, enabling shared use of memory, processing time, and peripheral devices. This meant that instead of a computer running only one program at a time with long idle periods, the operating system could schedule tasks, allocate memory, and manage input and output to keep the system busy and efficient. These developments matched the growth of integrated circuits, which improved speed and reliability and made more advanced system software practical. Third-generation systems also emphasized better user interaction through terminals and more standardized system environments. While later generations improved operating systems further, the third generation is widely credited in Information Technology history with establishing the operating system as a central system layer for managing shared resources. Therefore, the correct answer is the third generation.
NEW QUESTION # 122
Which data type should be used to calculate 90% of the retail price of an item?
Answer: A
Explanation:
To calculate a percentage of a price, you need a data type that can handle decimal values, as the result may not be a whole number. Here's why a floating-point data type is appropriate:
1.Precision: Floating-point data types are designed to handle numbers that have a fractional part, which is essential for representing percentages accurately.
2.Calculation: When calculating 90% of a retail price, you multiply the price by 0.9. This operation requires a data type that can represent both the price and the resulting product with decimal precision.
3.Storage: Floating-point types can store a wide range of values with precision, making them suitable for financial calculations where the exact amount matters.
The other options are not suitable for the following reasons:
*A. Boolean: Can only represent two values, true or false.
*C. Auto-number: Typically used for unique identifiers and cannot represent fractional values.
*D. String: While it can represent a number as text, it is not suitable for calculations without conversion, which is inefficient and error-prone.
References: The decision to use a floating-point data type for percentage calculations is supported by best practices in programming and database design, as discussed in various programming forums and documentation123. These sources recommend using decimal or floating-point types for financial calculations to ensure accuracy and avoid errors that can arise from binary floating-point representations2.
NEW QUESTION # 123
Which piece of network equipment extends the cable range and allows connections to be made by increasing the signal strength?
Answer: D
Explanation:
A repeater extends cable range by regenerating or amplifying a signal so it can travel farther without degrading. In Information Technology networking, signals weaken over distance due to attenuation and interference. A repeater receives the incoming signal, cleans or reconstructs it, and then retransmits it at full strength. This allows network segments to exceed the normal maximum cable length limits for a given standard and helps maintain reliable communication. Repeaters are commonly associated with the physical layer of networking because they deal with signal transmission rather than packet routing or traffic decisions.
A switch operates mainly at the data link layer and forwards frames based on MAC addresses within a local network, but it does not primarily exist to boost signal strength. A router connects different networks and forwards packets using IP addressing and routing tables. A firewall is a security device that filters traffic based on rules to protect networks. Since the question focuses on increasing signal strength to extend range, the correct equipment is a repeater.
NEW QUESTION # 124
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