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Past Papers CS101 – VU Computer Science Importants MCQs on Data Representation

Q#1: How many bits are used in a standard byte?
(A) 4 bits
(B) 6 bits
(C) 8 bits
(D) 16 bits
Answer: (C) 8 bits

Q#2: Which organization designed the American Standard Code for Information Interchange (ASCII)?
(A) ISO
(B) ANSI
(C) Unicode Consortium
(D) IEEE
Answer: (B) ANSI

Q#3: How many combinations can be represented using 7 bits in ASCII?
(A) 64
(B) 128
(C) 256
(D) 512
Answer: (B) 128

Q#4: What is the maximum number of characters that can be represented using 8 bits (1 byte) in ASCII?
(A) 64
(B) 128
(C) 256
(D) 512
Answer: (C) 256

Q#5: Which code standard supports thousands of character sets, including Chinese, Hebrew, and Japanese?
(A) ASCII
(B) ANSI
(C) Unicode
(D) ISO
Answer: (C) Unicode

Q#6: How many unique symbols can be represented using UTF-8 with 24 bits?
(A) 16,777,216
(B) 256
(C) 65,536
(D) 128
Answer: (A) 16,777,216

Q#7: What module discusses the representation of numeric values?
(A) Module 18
(B) Module 19
(C) Module 20
(D) Module 21
Answer: (B) Module 19

Q#8: How many numeric values can be represented using 16 bits?
(A) 256
(B) 65,535
(C) 16,777,216
(D) 65,536
Answer: (B) 65,535

Q#9: What is binary notation primarily composed of?
(A) Digits 0 to 9
(B) Digits 0 and 1
(C) Digits 0 to 7
(D) Digits 0 to 15
Answer: (B) Digits 0 and 1

Q#10: How many values can be represented using 4 bits in binary notation?
(A) 4
(B) 8
(C) 16
(D) 32
Answer: (C) 16

Q#11: How many numeric values can be represented using 16 bits in binary notation?
(A) 256
(B) 512
(C) 65,536
(D) 131,072
Answer: (C) 65,536

Q#12: What is the name for the smallest unit in an image?
(A) Vector
(B) Pixel
(C) Byte
(D) Dot
Answer: (B) Pixel

Q#13: How are black and white images typically represented using pixels?
(A) 8 bits per pixel
(B) 4 bits per pixel
(C) 2 bits per pixel
(D) 1 bit per pixel
Answer: (D) 1 bit per pixel

Q#14: How many bytes are used to represent one pixel in RGB encoding?
(A) 1 byte
(B) 2 bytes
(C) 3 bytes
(D) 4 bytes
Answer: (C) 3 bytes

Q#15: What does MIDI stand for in the context of sound representation?
(A) Musical Instrument Digital Interface
(B) Music In Digital Information
(C) Musical Instrument Data Integration
(D) Music In Digital Interface
Answer: (A) Musical Instrument Digital Interface

Q#16: How many bits are used to record data from each sample in today’s CDs?
(A) 8 bits
(B) 16 bits
(C) 24 bits
(D) 32 bits
Answer: (B) 16 bits

Q#17: What is the primary advantage of MIDI over traditional sound encoding methods?
(A) Smaller file size
(B) Higher fidelity
(C) Greater accuracy
(D) Wider compatibility
Answer: (A) Smaller file size

Q#18: In binary notation, what digit is used in each position?
(A) 0 or 1
(B) 0 to 9
(C) 1 or 2
(D) 1 to 10
Answer: (A) 0 or 1

Q#19: How is binary addition carried out when both bits are 1?
(A) It results in a carry-over
(B) It produces a 0 with no carry-over
(C) It produces a 1 with no carry-over
(D) It is not possible
Answer: (A) It results in a carry-over

Q#20: How many possibilities are there when adding two bits in binary notation?
(A) 2
(B) 3
(C) 4
(D) 5
Answer: (C) 4

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