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
11
The evolution of computers from large room-sized machines to portable devices illustrates a trend towards:
Answer:
Miniaturization
** The history of computing has been marked by simultaneous advancements in speed, storage capacity, and a reduction in physical size (miniaturization). These trends have made computers more powerful and accessible.
12
Which of the following units represents the largest amount of data?
Answer:
Terabyte (TB)
** The units increase in size as follows: Kilobyte, Megabyte, Gigabyte, Terabyte. A terabyte is approximately 1,000 gigabytes.
13
A computer designed to be used by one person at a time is called a:
Answer:
Personal Computer (PC)
** A Personal Computer, which is a type of microcomputer, is by definition intended for individual use.
14
**The primary difference between a supercomputer and a mainframe is:**
Answer:
Supercomputers focus on processing a few complex tasks, while mainframes handle many tasks simultaneously
** The architectural design differs; supercomputers are optimized for complex, computationally intensive tasks, whereas mainframes excel at high-volume input/output and transaction processing.
15
How many bits are in a nibble?
Answer:
4
** A nibble is half a byte, which means it is composed of 4 bits.
16
What type of computers are designed for individual use?
Answer:
Micro Computers
Microcomputers, which include desktop PCs, laptops, and tablets, are designed to be used by a single individual at a time. They are the most common type of computer and are used for a wide range of personal and professional tasks.
17
The term "microcomputer" was introduced to distinguish it from:
Answer:
Minicomputers
** When microcomputers were first developed, they were defined by being smaller and less powerful than the existing mainframes and minicomputers. They were made possible by the invention of the microprocessor.
18
In summary, the key trade-off between analog and digital computers is:
Answer:
Direct simulation vs. precision and flexibility
** Analog computers offer a direct and often faster way to simulate physical systems, but they lack the precision, reliability, and versatility of digital computers. Digital computers, through their programmable and precise nature, have become the dominant form of computing technology.
19
Which of the following is a disadvantage of an analog computer?
Answer:
All of the above.
** Analog computers are typically designed for a specific purpose and are not easily reprogrammable (not versatile). They also have limitations in terms of data storage and are generally less accurate than their digital counterparts.
20
The first general-purpose electronic computer, ENIAC, was a:
Answer:
Digital computer
** Although it used decimal arithmetic internally, ENIAC (Electronic Numerical Integrator and Computer) is considered the first general-purpose electronic digital computer because it operated on discrete numbers.