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
111
What is the diameter of a Compact Disk?
Answer:
12 cm
A standard Compact Disc (CD) has a diameter of 120 millimeters, which is equivalent to 12 centimeters. This size was standardized to store up to 74 minutes of audio, which was said to be the length of Beethoven's 9th Symphony.
112
The ribbon is used in_________?
Answer:
Dot Matrix printer
A dot matrix printer is a type of impact printer. It works by striking an ink-soaked cloth ribbon against the paper, using a matrix of pins to form characters. Laser printers use toner, and inkjet printers spray liquid ink.
113
Who is recognized for creating the architecture of modern computers?
Answer:
John Von Neumann
John Von Neumann developed the fundamental architecture used in most computers today.
114
The difference between memory and storage is that memory is ______ and storage is ______:
Answer:
Temporary, permanent
Memory (RAM) holds data temporarily, storage devices retain data permanently.
115
All the output which is Printed on a paper is called_________?
Answer:
Hard Copy
A hard copy is a physical copy or printout of a digital document. It is a tangible version of the information, in contrast to a soft copy, which exists only in digital form on a screen.
116
Which of the following is part of the CPU?
Answer:
Arithmetic Logic Unit
The ALU performs mathematical and logical operations inside the CPU.
117
What does the 'A' in AGP (used in motherboards) stand for?
Answer:
Accelerated
AGP means Accelerated Graphics Port, a high-speed point-to-point channel for attaching graphics cards.
118
To convert paper into editable text, a scanner uses:
Answer:
OCR
OCR (Optical Character Recognition) converts printed text into editable digital format.
119
Which printer applies images by melting ink before printing?
Answer:
Solid Ink Printer
Solid ink printers use solid blocks of ink that are melted to produce vivid prints.
120
The Control Unit of a digital computer is often called what?
Answer:
All of these
The Control Unit directs all operations, acting as the “nerve center” of the computer.