Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
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
31
What is the technical term for a group of four bits, which represents half of a byte?
Answer:
Nibble
In computing and digital communications, a byte typically consists of eight bits. A nibble, sometimes spelled nybble, is a four-bit aggregation or half-byte.
32
What is the fundamental unit used to represent a single character of information in computing?
Answer:
bit
In the context of digital data representation, a bit (binary digit) is the smallest unit of information, representing either a 0 or a 1.
33
How many Kilobytes (KB) are contained within one Megabyte (MB)?
Answer:
1024 Killobytes
In digital storage, one Megabyte (MB) is equivalent to 1024 Kilobytes (KB). This follows the binary standard where each successive unit of storage is 1024 times larger than the previous unit, starting from bytes to kilobytes, then megabytes.
34
The term 'bit' is an abbreviated form of which phrase?
Answer:
binary digit
The term 'bit' is a portmanteau derived from the words 'binary' and 'digit'. It represents the smallest unit of data in computing, which can hold one of two values, typically represented as 0 or 1, corresponding to the binary number system.
35
What is the octal equivalent of the binary number 101110?
Answer:
568
To convert binary 101110 to octal, group the bits into sets of three starting from the right: 101 and 110. The binary 101 equals 5 in decimal, and 110 equals 6. Therefore, the octal representation is 56.
36
Which digits are used to represent all values in the binary number system?
Answer:
Both A and B
The binary number system is a base-2 numeral system that uses only two symbols, 0 and 1, to represent all numerical values.
37
What is the total number of distinct values that can be represented by a single byte of data?
Answer:
256
A single byte consists of 8 bits. Since each bit can represent two states (0 or 1), the total number of unique combinations is calculated as 2 raised to the power of 8, which equals 256. This allows a byte to represent values ranging from 0 to 255.
38
How are NOT, AND, OR, and XOR classified in the context of programming and digital logic?
Answer:
Logical Operators
NOT, AND, OR, and XOR are fundamental logical operators used to perform Boolean operations. They evaluate expressions based on truth values and are essential for controlling program flow and performing bitwise operations in digital circuits.
39
What is the full form of the acronym ASCII in the context of computing?
Answer:
American standard code for information interchange
ASCII stands for American Standard Code for Information Interchange. It is a character encoding standard that assigns numeric values to characters, allowing computers to represent text.
40
What is the full form of the term 'bit' in computing?
Answer:
binary digit
The term 'bit' is a portmanteau derived from 'binary digit'. It represents the smallest unit of data in a computer, which can hold one of two values, typically represented as 0 or 1.