Chapter-1 Advanced Number Systems — Online MCQ Test
INFORMATION TECHNOLOGY · Grade 7 · CBSE(NCERT)
Practice Chapter-1 Advanced Number Systems with a free chapter-wise online MCQ test.
This chapter covers: binary - decimal - octal - hexadecimal - base conversion - bits - bytes - computer arithmetic.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-1 Advanced Number Systems — Important Questions & Answers
What is the base of the binary number system?
- A. 2
- B. 8
- C. 10
- D. 16
Answer: A. 2
The binary number system uses only two digits (0 and 1), making its base 2.
The binary number system uses only two digits (0 and 1), making its base 2.
How many bits are there in one byte?
- A. 4 bits
- B. 8 bits
- C. 16 bits
- D. 32 bits
Answer: B. 8 bits
A byte is the standard unit of digital information consisting of 8 bits.
A byte is the standard unit of digital information consisting of 8 bits.
How many bits are required to represent one hexadecimal digit?
- A. 2 bits
- B. 4 bits
- C. 8 bits
- D. 16 bits
Answer: B. 4 bits
One hexadecimal digit can be represented using 4 bits because 2⁴ = 16 (hexadecimal base).
One hexadecimal digit can be represented using 4 bits because 2⁴ = 16 (hexadecimal base).
What is the binary equivalent of the hexadecimal number A5?
- A. 10100011
- B. 10100101
- C. 10110101
- D. 11010101
Answer: B. 10100101
A (hex) = 1010 (binary), 5 (hex) = 0101 (binary). Therefore, A5 (hex) = 10100101 (binary).
A (hex) = 1010 (binary), 5 (hex) = 0101 (binary). Therefore, A5 (hex) = 10100101 (binary).
What will be the binary representation of -5 if we use signed magnitude representation with 8 bits?
- A. 10000101
- B. 10000100
- C. 11000101
- D. 01000101
Answer: A. 10000101
In signed magnitude representation, the leftmost bit is the sign bit (1 for negative). +5 is 00000101, so -5 is 10000101.
In signed magnitude representation, the leftmost bit is the sign bit (1 for negative). +5 is 00000101, so -5 is 10000101.