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
**Which of the following is an example of a computer application in daily life for entertainment?**
Answer:
Streaming movies and music
** Streaming services like Netflix, Spotify, and YouTube are popular computer applications that provide on-demand access to a vast library of movies, TV shows, and music for entertainment.
112
The performance of a supercomputer is measured in:
Answer:
FLOPS (Floating-point Operations Per Second)
** Because supercomputers are primarily used for scientific and numerical calculations, their performance is measured by how many floating-point (decimal number) operations they can perform per second.
113
Which characteristic of a computer is highlighted when it is used for tasks like weather forecasting and scientific research?
Answer:
High speed and accuracy
** Tasks like weather forecasting and scientific research involve massive amounts of data and complex calculations that need to be performed quickly and accurately. The high speed and accuracy of computers make them ideal for such applications.
114
**What is an algorithm?**
Answer:
A step-by-step procedure for calculations or other problem-solving operations
** In computer science, an algorithm is a finite sequence of well-defined, computer-implementable instructions, typically to solve a class of problems or to perform a computation.
115
**One kilobyte (KB) is equal to how many bytes?**
Answer:
1024 bytes
** In binary, which is the system computers use, computer memory is measured in powers of 2. A kilobyte is technically 2^10 bytes, which equals 1024 bytes.
116
**Which of the following computer applications is widely used for creating and managing databases in banking?**
Answer:
Database Management Systems (DBMS)
** Banks use robust Database Management Systems to handle vast amounts of customer data, transaction records, and other financial information securely and efficiently.
117
**Which of the following is an example of a web-based application used in daily life?**
Answer:
Google Docs
** Google Docs is a word processor that runs within a web browser without requiring any software to be installed on the user's computer, making it a web-based application.
118
What term describes computers that combine both measuring and counting?
Answer:
Hybrid
Hybrid computers are specialized machines that integrate the features of both analog and digital computers. Analog computers are excellent at measuring continuous data (like temperature or pressure), while digital computers excel at counting and logical operations. A hybrid system leverages both strengths, making it suitable for complex simulations and industrial control processes.
119
**A computer that is portable and suitable for use while traveling is known as a:**
Answer:
Laptop
** Laptops, also known as notebooks, are portable computers that are small and light enough to be used on one's lap, making them ideal for people who need computing power on the go.
120
**What is the brain of the computer called?**
Answer:
CPU (Central Processing Unit)
** The CPU is the primary component of a computer that performs most of the processing inside the computer. It is responsible for executing instructions and performing calculations.