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
3411
An interface electronic circuit used to connect I/O devices to a computer’s CPU or _____ is a:
Answer:
Buffer
Buffers act as intermediaries facilitating communication between I/O devices and the CPU or memory.
3412
Dot matrix and band printers are classified as what type?
Answer:
Impact
Impact printers physically strike paper to create images.
3413
What does the letter 'C' in CPU represent?
Answer:
Central
CPU stands for Central Processing Unit. The 'C' stands for Central, which highlights its role as the primary component of a computer that controls operations and performs the processing, acting as the 'brain' of the system.
3414
Retaining data for future use is called:
Answer:
Storing
Storing is the act of saving data to a storage medium.
3415
A plastic card similar to a credit card but containing memory and a microprocessor embedded within is called a:
Answer:
Chip card
Chip cards (smart cards) integrate a microprocessor for data processing and storage.
3416
Reusable optical storage typically has the acronym:
Answer:
RW
RW (Rewritable) is used for optical storage media that can be erased and rewritten, such as CD-RW or DVD-RW.
3417
What is required for an inkjet printer to function?
Answer:
Cartridge
Inkjet printers use cartridges containing ink to print images.
3418
What is a light pen?
Answer:
Optical input device
A light pen is an input device that is sensitive to light. It works by detecting changes in brightness on a CRT screen as the screen's electron beam refreshes the display, allowing the computer to determine the pen's position. Because it uses light detection, it is classified as an optical input device.
3419
Registers partially visible to users and used to hold conditional information are called:
Answer:
Flags
Flags store condition codes, such as zero or carry, after operations.
3420
What does a multiplexer mean?
Answer:
Many inputs to one output
A multiplexer selects one input line out of many for output.