Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
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
1831
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.
1832
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.
1833
What is required for an inkjet printer to function?
Answer:
Cartridge
Inkjet printers use cartridges containing ink to print images.
1834
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.
1835
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.
1836
What does a multiplexer mean?
Answer:
Many inputs to one output
A multiplexer selects one input line out of many for output.
1837
How many bytes are in a Megabyte (MB)?
Answer:
1,048,576
One megabyte (MB) is 1,048,576 bytes (1,024 × 1,024) using binary calculation, though 1,000,000 bytes in decimal.
1838
The use of spooler programs and/or ______ hardware allows PC users to process data simultaneously while printing:
Answer:
Buffer
Buffers temporarily store print data, enabling concurrent processing and printing.
1839
A disk storage medium consisting of a single rigid magnetic disk permanently assembled is a:
Answer:
Fixed disk
Fixed disks are hard drives with a permanently enclosed magnetic platter.
1840
Who proposed the concept of the stored program?
Answer:
John Neumann
John von Neumann introduced the concept of storing programs in memory for execution by computers.