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
151
**What is the role of computers in modern communication, a key aspect of daily life?**
Answer:
They enable instant communication through email, instant messaging, and video calls
** Computers and the internet have transformed communication by providing numerous platforms for instant and real-time interaction, connecting people across the globe easily and affordably.
152
The development of the microprocessor led to the creation of:
Answer:
Microcomputers
** The microprocessor, a single integrated circuit that contains all the functions of a central processing unit, was the key technological innovation that made it possible to build small, low-cost computers for personal use.
153
**A 'word' in computer architecture refers to:**
Answer:
A fixed-size group of bits handled as a unit by the instruction set or hardware of the processor
** The word size of a computer (e.g., 32-bit or 64-bit) determines how much data the CPU can process at one time and is a fundamental aspect of its architecture.
154
The fundamental difference between analog and digital computers lies in:
Answer:
The way they represent data
** The core distinction is how information is represented. Analog computers use a continuous range of values, while digital computers use a discrete set of values (binary). This fundamental difference leads to all the other variations in their characteristics and applications.
155
Which of the following is a type of non-volatile memory?
Answer:
Flash drive
** Non-volatile memory is a type of memory that can retain stored information even when not powered. Flash drives, SSDs, and ROM are all examples of non-volatile memory. RAM is volatile.
156
Analog computers are primarily used for:
Answer:
Specific scientific and engineering problems
** Due to their nature, analog computers are best suited for solving systems of differential equations and simulating physical systems, which are common tasks in science and engineering.
157
Which of the following terms does not belong to a classification of computers based on size?
Answer:
Digital computer
Computers can be classified by their size and processing power into categories like microcomputer (e.g., PC), minicomputer, and mainframe computer. "Digital computer" describes how a computer processes information (using discrete digits), not its size. An analog computer would be the counterpart to a digital one.
158
A computer's accuracy is dependent on:
Answer:
The user's instructions and the input data.
** While computers are highly accurate machines, their output is entirely dependent on the correctness of the input data and the instructions given to them. This is often referred to as "Garbage In, Garbage Out" (GIGO).
159
**Which of the following is an example of an input device?**
Answer:
Keyboard
** An input device is any hardware device that sends data to a computer, allowing you to interact with and control it. A keyboard sends text and command inputs to the computer.
160
**What does 'volatile memory' mean in the context of computers?**
Answer:
It requires power to maintain the stored information; it loses its contents when power is turned off
** RAM (Random Access Memory) is the most common type of volatile memory. When you turn off your computer, anything stored in RAM is lost.