Information and Communication Technology MCQ

771. What component holds the address of the next instruction

Correct Answer: Correct answer is: (D) Program Counter.

Exam Relevance: Computer Architecture, Computer Organization, Microprocessors

Difficulty: Easy

Concept notes: The Program Counter (PC) holds the address of the next instruction to be executed in a computer's memory.

Common Mistakes: Students often confuse the Program Counter with the Memory Address Register, which holds the address of the current memory location being accessed, not the next instruction.

Explanations: The Program Counter (PC) is a special-purpose register in the CPU that holds the address of the next instruction to be executed. This allows the CPU to fetch and execute instructions sequentially. The PC is incremented after each instruction fetch, pointing to the next instruction in memory. This ensures that the CPU can follow the sequence of instructions in a program.

Option Analysis:

Option A: The Memory Data Register (MDR) holds the actual data being read from or written to memory, not the address of the next instruction.
Option B: The Accumulator is a register used for arithmetic and logic operations, not for holding the address of the next instruction.
Option C: The Memory Address Register (MAR) holds the address of the current memory location being accessed, not the address of the next instruction.
Option D: The Program Counter (PC) holds the address of the next instruction to be executed, making it the correct answer.

Mnemonic: PC = Next Instruction Address

772. The shortcut key that can be used to activate or open the find and replace screen is

Correct Answer: Correct answer is: (B) CtrlH.

Exam Relevance: Microsoft Office Specialist, CompTIA A+, Google Workspace Admin

Difficulty: Very Easy

Concept notes: The shortcut key CtrlH is commonly used to activate the find and replace function in many text editors and word processing software.

Common Mistakes: Students may confuse CtrlH with other common shortcuts like CtrlF for find or CtrlG for go to.

Explanations: CtrlH is the standard shortcut for opening the find and replace dialog box in most text editors and word processors. This function allows users to search for specific text and replace it with another text, streamlining the editing process.

Option Analysis:

Option A: CtrlG is typically used for the "Go To" function, not for find and replace.
Option B: CtrlH is the correct shortcut for find and replace in most software.
Option C: AltG is not a standard shortcut for find and replace.
Option D: AltH is not a standard shortcut for find and replace.

Mnemonic: Remember: "H" for "Highlight and Replace."

773. In a non-vectored interrupt, the address of interrupt service routine is?

Correct Answer: Correct answer is: (D) Assigned to a fixed memory location.

Exam Relevance: Computer Architecture, Operating Systems, Microprocessors

Difficulty: Moderate

Concept notes: In a non-vectored interrupt, the address of the interrupt service routine is predetermined and stored at a fixed memory location.

Common Mistakes: Students often confuse non-vectored interrupts with vectored interrupts, where the interrupting device provides the address of the interrupt service routine.

Explanations: In non-vectored interrupts, the address of the interrupt service routine is not dynamically determined by the interrupting device or a vector address generator. Instead, it is statically assigned to a fixed memory location. This means that the processor knows in advance where to find the interrupt service routine, simplifying the interrupt handling process.

Option Analysis:

Option A: This is incorrect because in non-vectored interrupts, the address is not obtained from an interrupt address table.
Option B: This is incorrect because in non-vectored interrupts, the address is not supplied by the interrupting I/O device.
Option C: This is incorrect because in non-vectored interrupts, the address is not obtained through a vector address generator device.
Option D: This is correct because in non-vectored interrupts, the address of the interrupt service routine is assigned to a fixed memory location.

774. Which is an item of storage medium in the form of circular plate?

Correct Answer: Correct answer is: (A) Disk.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: A disk is a storage medium that is typically circular in shape and used to store digital data.

Common Mistakes: Students may confuse the function of a disk with other computer components like the CPU or ALU, which are not storage devices.

Explanations: A disk is a storage medium that is circular in shape and used to store digital data. It can be a hard disk drive (HDD) or a solid-state drive (SSD) in the form of a circular plate. The other options, such as CPU, Printer, and ALU, are not storage mediums and do not have the circular plate form.

Option Analysis:

Option A: Disk is a storage medium in the form of a circular plate.
Option B: CPU (Central Processing Unit) is not a storage medium and does not have a circular plate form.
Option C: Printer is a hardware device used for printing and is not a storage medium.
Option D: ALU (Arithmetic Logic Unit) is a part of the CPU and is not a storage medium.

775. Which term describes the physical layout of a Network?

Correct Answer: Correct answer is: (A) Topology.

Exam Relevance: CCNA, Network+, CompTIA A+

Difficulty: Very Easy

Concept notes: Topology refers to the physical layout or arrangement of a network, including the positions of devices and the connections between them.

Common Mistakes: Students may confuse the term "topology" with similar-sounding terms like "topping" or "topiology," which are not related to network layouts.

Explanations: Topology is the correct term for describing the physical layout of a network. It encompasses the arrangement of devices and the connections between them, which is crucial for understanding network design and functionality.

Option Analysis:

Option A: Correct. Topology is the term used to describe the physical layout of a network.
Option B: Incorrect. "Topping" is not a term used in network design or layout.
Option C: Incorrect. "Topiology" is not a valid term and does not exist in network terminology.
Option D: Incorrect. "Toppology" is a misspelling and not a valid term in network terminology.

Mnemonic: Think "Topo" for "Topography" to remember the layout aspect.

776. A device shaped like a pencil eraser that is positioned between key on a keyboard.

Correct Answer: Correct answer is: (B) Pointing stick.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: A pointing stick is a small, pressure-sensitive, rubber nub typically located between the G, H, and B keys on a laptop keyboard. It functions as an alternative to a mouse, allowing users to navigate the screen by pressing the nub in different directions.

Common Mistakes: Students may confuse a pointing stick with a joystick, which is a handheld device used for gaming and navigation, or with pen input, which involves using a stylus to interact with a screen.

Explanations: A pointing stick is a device shaped like a pencil eraser positioned between the keys on a keyboard. It is designed to be used for cursor control, making it the correct answer. The other options do not fit the description: a joystick is a handheld device, pen input involves a stylus, and "None of the above" is incorrect since a pointing stick is a valid option.

Option Analysis:

Option A: A joystick is a handheld device used for gaming and navigation, not a device on a keyboard.
Option B: A pointing stick is a small, pressure-sensitive nub located between the keys on a keyboard, used for cursor control.
Option C: Pen input involves using a stylus to interact with a screen, not a device on a keyboard.
Option D: "None of the above" is incorrect since a pointing stick is a valid option.

Mnemonic: Pencil Eraser Nub (PEN) for Pointing Stick

777. This sends signals such as "I/O Read"

Correct Answer: Correct answer is: (A) Control Unit.

Exam Relevance: Computer Architecture, Computer Organization, Digital Systems

Difficulty: Moderate

Concept notes: The Control Unit is responsible for sending signals to other components of the computer system, such as "I/O Read" signals to manage input and output operations.

Common Mistakes: Students may confuse the Control Unit with the Arithmetic Logic Unit (ALU), which performs arithmetic and logical operations, or the Cache, which is a high-speed memory.

Explanations: The Control Unit is the component of the CPU that directs and coordinates the operation of the computer. It sends control signals to other parts of the system, including signals for I/O operations. The Arithmetic Logic Unit (ALU) performs calculations and logical operations, the Accumulator stores intermediate results, and the Cache is a fast memory that stores frequently accessed data. Therefore, the Control Unit is the correct answer as it is responsible for sending signals such as "I/O Read".

Option Analysis:

Option A: The Control Unit is responsible for sending control signals to other components, including I/O operations.
Option B: The Arithmetic Logic Unit performs arithmetic and logical operations, not control signals.
Option C: The Accumulator stores data, not control signals.
Option D: The Cache is a high-speed memory, not a control signal sender.

778. Which statement is true?

Correct Answer: Correct answer is: (C) RAM stores programs / data used by the CPU.

Exam Relevance: AP Computer Science Principles, A+ Certification, CompTIA IT Fundamentals

Difficulty: Easy

Concept notes: RAM (Random Access Memory) is a type of volatile memory that stores data and programs that the CPU needs to access quickly.

Common Mistakes: Students may confuse RAM with ROM, thinking that ROM is used for temporary storage of programs and data.

Explanations: RAM is a volatile memory that stores data and programs that the CPU needs to access quickly. This makes it essential for the operation of the computer, as the CPU can read and write data to RAM much faster than to other storage devices like the hard disk. Therefore, RAM is used to store programs and data that are currently in use by the CPU.

Option Analysis:

Option A: RAM is not part of the hard disk; it is a separate component of the computer's memory system.
Option B: ROM (Read-Only Memory) is non-volatile, meaning it retains data even when the power is turned off.
Option C: RAM stores programs and data used by the CPU, which is correct.
Option D: ROM typically contains the BIOS (Basic Input/Output System), not the operating system, which is usually stored on the hard disk.

Mnemonic: RAM: Readily Accessible Memory

779. What type of data would your name be?

Correct Answer: Correct answer is: (D) String.

Exam Relevance: AP Computer Science, SAT Subject Test in Computer Science, IB Computer Science

Difficulty: Easy

Concept notes: Names are sequences of characters, which are best represented by the data type "String".

Common Mistakes: Students may confuse "String" with "Integer" if they think names can be represented by numbers.

Explanations: Names consist of letters, spaces, and sometimes special characters. These are all characters, and the data type that can store a sequence of characters is called a "String". Therefore, your name would be classified as a String.

Option Analysis:

Option A: Real numbers are used for numerical values with decimal points, not for names.
Option B: Boolean values represent true or false, which is not applicable to names.
Option C: Integer values are used for whole numbers, not for names.
Option D: String is the correct data type for sequences of characters, such as names.

Mnemonic: S - String, Saves Sequences

780. What is the function of the Arithmetic and Logic Unit (ALU)?

Correct Answer: Correct answer is: (C) Executes command and manipulates data.

Exam Relevance: Computer Architecture, Digital Logic Design, Computer Organization

Difficulty: Moderate

Concept notes: The Arithmetic and Logic Unit (ALU) is a fundamental component of a computer's central processing unit (CPU) that performs arithmetic and logical operations.

Common Mistakes: Students may confuse the ALU with other CPU components like the control unit or registers, which have different functions.

Explanations: The ALU is responsible for executing commands and manipulating data. It performs operations such as addition, subtraction, multiplication, division, and logical operations like AND, OR, and NOT. This function is critical for processing data and executing instructions in a computer system.

Option Analysis:

Option A: The ALU does not carry data; it processes data provided to it.
Option B: The ALU does not hold data for further manipulation; it processes data immediately.
Option C: The ALU executes commands and manipulates data, which is its primary function.
Option D: The ALU does not provide temporary data storage; that is the function of registers or cache.

Mnemonic: ALU: Always Logic and Arithmetic

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3 thoughts on “Information and Communication Technology MCQ - Set 78”

Peter Ross April 8, 2020
The MCQ is quite entertaining and will help in increasing knowledge also.
Reyaz Ahmad khan December 26, 2020
plz help me in regard with current Affairs
Eshita Nandpal April 11, 2021
Plz give make a part of unit wise

3 thoughts on “Information and Communication Technology MCQ - Set 78”

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