Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
151
The two basic types of disks are floppy disks and:
Answer:
Hard disks
Floppy disks are portable magnetic storage, while hard disks offer higher capacity and speed.
152
Digital systems most commonly operate on which number system?
Answer:
Binary
Digital electronics use the binary (base-2) number system for data representation.
153
A KB equals _____ bytes.
Answer:
1,000
In computing, 1 kilobyte (KB) typically equals 1,000 bytes, though sometimes used as 1,024 bytes in binary calculations.
154
Having more than one of the same component is an example of what type of system?
Answer:
Redundant
Redundant systems duplicate critical components to prevent service interruption in case of failure.
155
Which computers connect many terminals and support multitasking?
Answer:
Minicomputers
Minicomputers manage multiple simultaneous users and tasks.
156
Saving to which device keeps data intact after power-off?
Answer:
Secondary storage device
Secondary storage like hard drives and SSDs retains data without power.
157
Which of these is NOT an input/output device?
Answer:
ALU
The ALU is part of the CPU and not an I/O device.
158
What is the difference between memory and storage?
Answer:
Memory is temporary, storage is permanent
Memory (like RAM) temporarily holds data for quick access, while storage (like hard drives) retains data permanently.
159
Which part of a machine-level instruction tells the CPU what action to perform?
Answer:
Operation code
The operation code (opcode) specifies the exact operation or command the CPU should execute.
160
Which component contains ROM, CPU, RAM, and expansion cards?
Answer:
Motherboard
The motherboard houses the main processing and memory components and slots for expansion cards.