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
81
What is the smallest unit of data in a computer?
Answer:
Bit
** A bit (short for binary digit) is the most basic unit of information in computing. It can have one of two values, typically represented as 0 or 1.
82
**A handheld computer, smaller than a laptop, is often called a:**
Answer:
Personal Digital Assistant (PDA) or Smartphone
** PDAs were early handheld computers, and their functionality has been largely integrated into modern smartphones, which are powerful, portable computing devices.
83
**A type of microcomputer that is designed to be placed on a desk and is not portable is called a:**
Answer:
Laptop
** A desktop computer is a personal computer that fits on or under a desk. It has a monitor, keyboard, mouse, and a CPU tower. Unlike laptops, it is not designed for portability.
84
Which application of computers in daily life involves buying and selling goods and services over the internet?
Answer:
E-commerce
** E-commerce (electronic commerce) refers to the entire online process of developing, marketing, selling, delivering, servicing, and paying for products and services.
85
A scanner is a type of:
Answer:
Input device
** A scanner is used to convert physical documents or images into a digital format that can be stored and manipulated on a computer. Therefore, it is an input device.
86
The overall purpose of all the characteristics of a computer is to:
Answer:
Process data into useful information.
** At its core, a computer is a data processing machine. All its characteristics—speed, accuracy, storage, etc.—work together to achieve the fundamental goal of taking raw data, processing it, and producing meaningful information.
87
A key characteristic of a mainframe computer is its:
Answer:
High reliability and ability to support thousands of users simultaneously
** Mainframes are designed for high availability and reliability, often with redundant components to prevent failures. They are also designed to handle a massive number of concurrent users and transactions.
88
The term 'bit' is a contraction of:
Answer:
Binary Digit
** The word 'bit' was coined by John Tukey as a shorthand for 'binary digit', which is the fundamental unit of information in a binary system.
89
The term used to describe the tangible and intangible components of a computer system is:
Answer:
Hardware and Software
** These two terms encompass the entire computer system. Hardware is the physical equipment, and software is the set of instructions that runs on that equipment.
90
The main advantage of a digital computer over an analog computer is its:
Answer:
Accuracy and programmability
** Digital computers are more accurate because they work with discrete values, which are less susceptible to noise and interference than the continuous values used by analog computers. They are also highly programmable, making them more versatile.