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NEW QUESTION # 137
Which generation of computing is associated with integrated circuits?
Answer: C
Explanation:
The third generation of computing is strongly associated with the introduction and widespread use of integrated circuits. Integrated circuits, often called ICs, combine many electronic components such as transistors, resistors, and capacitors onto a single silicon chip. This integration dramatically reduced the physical size of computers while increasing processing speed, reliability, and efficiency. Compared with second-generation transistor-based computers, third-generation machines produced less heat, required less maintenance, and offered better overall performance. This era also enabled more sophisticated computer designs, supporting improved input and output devices and stronger system capabilities for business and scientific computing. In many standard Information Technology references, the generational shift is summarized as first generation using vacuum tubes, second generation using transistors, third generation using integrated circuits, and fourth generation using microprocessors. Fifth generation is generally linked with artificial intelligence and advanced parallel processing concepts rather than the initial adoption of ICs.
Therefore, the generation most clearly identified with integrated circuits is the third generation.
NEW QUESTION # 138
Which of the following is required for communication over the Internet?
Answer: C
Explanation:
Communication over the Internet relies on packet-switched networks. Here's why:
1.Packet Switching:
oThe Internet uses a packet-switching approach to transmit data.
oIn this method, data is divided into smaller packets before transmission.
oEach packet contains a portion of the original data along with addressing information.
oThese packets are then sent independently across the network.
oAt the destination, the packets are reassembled to reconstruct the original data.
2.Advantages of Packet Switching:
oEfficiency: Packet switching allows multiple users to share the same network resources efficiently.
oRobustness: If a link or node fails, packets can find alternative routes to reach their destination.
oScalability: The network can handle varying traffic loads without significant reconfiguration.
3.Other Options:
oAn IP Alias: An IP alias is an additional IP address associated with a network interface. It is not a requirement for communication over the Internet.
oA LAN (Local Area Network): A LAN is a local network within a limited geographical area. While LANs are essential for local communication, they are not directly required for Internet communication.
oA circuit-switched network: Circuit-switched networks establish dedicated connections between sender and receiver. The Internet does not use this approach.
oAn analog signal: Analog signals were used in older communication systems (e.g., telephone lines), but the Internet primarily relies on digital signals.
References:
*1ITExamAnswers: 5.4.3 Communications Principles Quiz Answers
*2GCFGlobal.org: Computer Basics - Connecting to the Internet
NEW QUESTION # 139
An Instructor delivers a quiz to the students in a class, assigns a grade to each quiz, and determines the minimum, maximum, and average grade. When the quizzes are returned, the students receive the average differential for each grade.
Which content is considered data in this scenario?
Answer: B
Explanation:
In this scenario, the grade for each quiz is considered data. Each student's specific score represents a discrete piece of information, and collectively, these individual grades form the dataset that the instructor analyzes to calculate the minimum, maximum, and average grades1. The other options (average differential, minimum and maximum grade for all quizzes, and average grade for all quizzes) are derived metrics or summaries based on this raw data2.
NEW QUESTION # 140
One database field needs to be restricted to only those values that are single alphanumeric symbols. Which data type should be used?
Answer: C
Explanation:
A field restricted to single alphanumeric symbols should use the character data type because it is designed to store exactly one character. Alphanumeric symbols include letters A through Z and digits 0 through 9, and these are naturally represented as individual characters. In Information Technology and database systems, selecting a character type allows the designer to enforce a fixed length of one, which helps maintain data integrity by preventing longer entries. An integer type is used for whole numbers and would not properly handle letters, while floating point is for decimal values and is also inappropriate for single symbols. A character string type can store multiple characters, which would allow inputs longer than one symbol unless additional constraints are applied. Using the character type is therefore the most direct and standard approach for storing one letter or digit, such as a middle initial, a grade code, or a single-character category label.
Therefore, the correct data type is character.
NEW QUESTION # 141
What translates and executes source code into machine language one line at a time?
Answer: C
Explanation:
An interpreter translates and executes source code one line at a time. In Information Technology, interpretation is a method of program execution where each statement is read, translated into machine-level actions, and executed immediately. This allows programmers to test and debug quickly because errors are often reported at the line where execution stops. Many scripting languages and interactive environments use interpreters, supporting rapid development and flexibility. Unlike a compiler, which translates the entire program into a machine code file that can be executed later, an interpreter generally requires the source code or intermediate representation to be present at runtime. An assembler is used for assembly language and converts mnemonic instructions into machine code, but it is not typically described as executing source code one line at a time. The operating system manages system resources and provides services, but it is not the tool that translates programming language source code into machine language during execution. Therefore, the correct answer for translating and executing code line by line is interpreter.
NEW QUESTION # 142
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