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
3401
Who built the first mechanical calculator?
Answer:
Blaise Pascal
Blaise Pascal invented the Pascaline in 1642, one of the earliest mechanical calculators.
3402
What is the central component that executes instructions in a computer system?
Answer:
CPU
The CPU (Central Processing Unit) is the primary component of a computer that acts as its "brain." It is responsible for interpreting and executing most of the commands from the computer's other hardware and software, making it the central component for instruction execution.
3403
Which type of memory is prone to data loss when the power is turned off?
Answer:
{'option': 'RAM', 'description': 'Random Access Memory'}
RAM (Random Access Memory) is a type of volatile memory. This means it requires a constant supply of power to maintain the stored information. When the computer's power is turned off, all data stored in RAM is lost.
3404
Magnetic tapes are good for:
Answer:
Backup and high-volume data
Magnetic tapes are suited for high-capacity backups and archival storage.
3405
Device used to enter data or information into a computer include:__________?
Answer:
All
An input device is any hardware component that allows users to enter data and instructions into a computer. A keyboard is used for typing text, a mouse is used for pointing and clicking, and a microphone is used to input sound. Therefore, all the listed items are input devices.
3406
What does ASCII stand for?
Answer:
American Standard Code for Information Interchange
ASCII is a standard coding scheme used to represent text in computers and communication equipment.
3407
WAN hardware includes:
Answer:
Multiplexers and routers
Wide area networks use devices like multiplexers and routers to manage data transmission.
3408
What type of keys are F1 through F12 referred to as?
Answer:
Function keys
The keys labeled F1 through F12 on a computer keyboard are known as function keys. Their specific purpose or function can vary depending on the operating system and the software application that is currently active.
3409
How many types of semiconductor memory are typically used in computers?
Answer:
Two
The two common types are RAM (volatile) and ROM (non-volatile).
3410
Which of the following is NOT hardware?
Answer:
Assembler
An assembler is software that converts assembly language to machine code.