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
2391
_____________computers operates essentially by counting?
Answer:
Digital computer
Digital computers operate by processing data represented in a discrete, numerical form. At the most fundamental level, all their operations, from arithmetic to text processing, are based on manipulating binary digits (0s and 1s), which is a form of counting.
2392
One megabyte (MB) is approximately equal to:
Answer:
1,000 kilobytes
** In the decimal system, a megabyte is 1,000 kilobytes or 1,000,000 bytes.
2393
A computer's ability to perform calculations without making mistakes is a testament to its:
Answer:
Accuracy
** Computers are designed to be extremely accurate. They can perform complex mathematical calculations with a very high degree of precision, far exceeding human capabilities for such tasks.
2394
An adaptive computer-based test is one that:
Answer:
Adapts to the test-taker's ability level by adjusting the difficulty of subsequent questions.
** Computer-adaptive testing (CAT) is an advanced form of assessment where the test tailors itself to the individual's performance, providing a more accurate measure of their ability.
2395
What is the term for unprocessed facts and figures?
Answer:
Information
** Data is the raw material that is input into a computer system. It is only after the computer processes this data that it becomes useful information.
2396
The trend of 'downsizing' in corporate IT in the 1990s involved replacing:
Answer:
Mainframes and minicomputers with networks of microcomputers (client-server architecture)
** As microcomputers became more powerful and networking technology improved, many organizations found it more cost-effective to move their applications from expensive mainframes and minicomputers to a client-server model based on networks of PCs and servers.
2397
An electrocardiogram (ECG) machine that measures the heart's electrical activity and displays it as a graph is a form of:
Answer:
Hybrid computer
** Modern ECG machines are often hybrid systems. The electrodes and amplifiers that measure the continuous electrical signals from the heart are the analog part. The processor that analyzes these signals, filters out noise, and displays them on a screen is the digital part.
2398
**Which computer type was a bridge between mainframes and microcomputers?**
Answer:
Minicomputer
** Minicomputers filled a niche in the 1960s and 1970s for organizations that needed significant computing power but could not afford or did not need a mainframe. They were a crucial step in making computing more accessible.
2399
The abacus is an early form of a:
Answer:
Digital computing device
** Although it is a mechanical device, the abacus can be considered a digital computing device because it represents numbers using the discrete positions of beads on rods.
2400
**A group of 4 bits is known as a:**
Answer:
Nibble
** A nibble is a four-bit aggregation, or half an octet. As a nibble contains 4 bits, there are sixteen (2^4) possible values, so a nibble corresponds to a single hexadecimal digit.