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
1
Devices used to convert one number system into another are called:
Answer:
Decoder
Decoders translate encoded data to a different numerical or signal format.
2
What type of access method does magnetic tape use?
Answer:
Sequential
Magnetic tape is accessed sequentially, meaning data is read or written in order from start to finish.
3
A common network topology is the:
Answer:
Star
The star topology is widely used in networking where nodes are connected to a central hub.
4
The CPU consists of:
Answer:
Control unit, arithmetic-logic unit, primary storage
The CPU is made up of the control unit, ALU (arithmetic-logic unit), and primary storage like RAM.
5
Actual execution of instructions in a computer takes place in?
Answer:
ALU (Arithmetic Logic Unit)
The ALU performs arithmetic and logic operations, carrying out instructions' execution.
6
The octal number system has base:
Answer:
8
Octal is a base-8 system using digits 0 to 7.
7
What does the abbreviation VAB stand for?
Answer:
Voice answer back
VAB refers to systems that provide voice-based response.
8
In 1's complement arithmetic, the number subtracted from another is called:
Answer:
Subtrahend
The subtrahend is the number being subtracted in subtraction operations.
9
ICs are classified based on what?
Answer:
Number of transistors
Integrated circuits are categorized by their transistor count (e.g., SSI, MSI, LSI, VLSI).
10
When performing subtraction using 2's complement representation, which term identifies the quantity being deducted from the initial value?
Answer:
Subtrahend
In 2's complement arithmetic, just like in standard decimal subtraction, the term 'subtrahend' refers to the number that is being subtracted. The 'minuend' is the number from which another number is subtracted. The 'difference' is the result of the subtraction. 'Borrow' relates to the mechanical process of subtraction, but isn't the name of one of the numbers involved.