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
61
What is the typical storage capacity of a normal CD-ROM?
Answer:
680 MB
A standard CD-ROM (Compact Disc Read-Only Memory) has a storage capacity of approximately 650 to 700 megabytes (MB). The 680 MB value is a commonly cited capacity, which was sufficient for distributing software, music albums, and other data in its time.
62
Which device can store large amounts of data?
Answer:
Hard disk
Hard disks provide high-capacity, long-term data storage.
63
A typical business personal computer would have approximately:
Answer:
256 KB of RAM
Older business PCs commonly had around 256 KB RAM for operation.
64
Which of the following is an example of an embedded system?
Answer:
All of the above
Embedded systems are dedicated computers within devices like calculators and machine tools.
65
What device acts as an input method for a computer?
Answer:
Light pen
A light pen is a computer input device in the form of a light-sensitive wand. Users can point to objects or draw on a CRT screen, allowing for direct interaction. A VDU (monitor) and printer are output devices, while a TV is primarily for display.
66
What is 12 + 12?
Answer:
24
12 plus 12 is 24 in decimal.
67
In a database, which fields store numbers used for calculations?
Answer:
Numeric
Numeric fields in a database store numbers that can be used in mathematical operations.
68
What is 110 + 110 in binary?
Answer:
1100 (Decimal 12)
110 (6) plus 110 (6) equals 1100 (12) in binary.
69
The type of memory for information that does not change on your computer is:
Answer:
ROM
ROM stores permanent data and instructions that remain unchanged.
70
Which device can distinguish between data and programs?
Answer:
Microprocessor
The microprocessor processes instructions and differentiates between data and executable commands.