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
61
While computers are highly efficient at processing data, what is the fundamental form in which they store and remember information?
Answer:
Series of 1s and 0s
At the most fundamental level, computers operate using binary code, which consists of a series of 1s and 0s (bits).
62
What is the full form of the character encoding standard ASCII?
Answer:
American Standard Code for Information Interchange
ASCII stands for American Standard Code for Information Interchange. It is a character encoding standard for electronic communication.
63
What is the binary equivalent of the octal number 73?
Answer:
1110112
To convert octal to binary, each digit is converted to its three-bit binary equivalent. The digit 7 becomes 111 and 3 becomes 011. Combining these results in 111011. Note: The input '738' is technically invalid as 8 is not an octal digit.
64
Computers convert raw data into information by performing operations primarily on which type of input?
Answer:
numbers
At the most fundamental hardware level, computers operate using binary logic. All data, whether it is text, images, or sound, is converted into numerical binary digits (bits) consisting of 0s and 1s.
65
What is the standard term for a collection of eight bits?
Answer:
Byte
In computing and digital communications, a byte is a unit of digital information that most commonly consists of eight bits.
66
How many unique characters can be represented by the standard ASCII coding system?
Answer:
128 different characters
Standard ASCII (American Standard Code for Information Interchange) uses 7 bits to represent characters, which allows for 2 to the power of 7, resulting in 128 unique characters.
67
What is the specific term for a sequence consisting of eight binary digits (0s and 1s)?
Answer:
byte
In computing and digital communications, a byte is a unit of digital information that typically consists of eight bits. Each bit represents a binary value of either 0 or 1.
68
In the context of negative logic, what does the logic state 1 represent?
Answer:
lower voltage level
Negative logic is a digital logic system where the more negative voltage level represents the logical '1' state, and the less negative (or higher) voltage level represents the logical '0' state. Therefore, 1 corresponds to the lower voltage level.
69
Why do binary numbers require more digits to represent values compared to decimal numbers?
Answer:
Binary base is small
Binary is a base-2 system, meaning it only uses two digits (0 and 1). Because the base is small, it takes more digits to represent the same magnitude of a number compared to a base-10 (decimal) system.
70
How many distinct symbols or characters are represented in the Baudot code system?
Answer:
58
Baudot code is a character set that uses five bits per character. Because it is a 5-bit code, it can represent 32 unique values. However, by using a 'letters' and 'figures' shift mechanism, the total number of representable symbols is expanded to 58.