# Samacheer Kalvi Class 11 Computer Science Number System Questions - 1

Question: 1

The simplest method to represent a negative binary number is called

(A) signed magnitude

(B) sign bit or parity bit

(C) binary

(D) decimal

Ans: A

signed magnitude

Question: 2

The computer can understand _____ languages.

(A) pre

(B) post

(C) computer

(D) machine

Ans: D

machine

Question: 3

What is the 1’s complement of 11001?

(A) 11110000

(B) 01010101

(C) 100100111

(D) 11100110

Ans: D

11100110

Question: 4

The most commonly used number system is

(A) decimal

(B) binary

(D) octal

Ans: A

decimal

Question: 5

The binary equivalent of hexadecimal number B is

(A) 1011

(B) 1100

(C) 1001

(D) 1010

Ans: A

1011

Question: 6

What is the ASCII value for blank space?

(A) 2

(B) 8

(C) 18

(D) 32

Ans: D

32

Question: 7

BCD is ______ bit code.

(A) 6

(B) 7

(C) 8

(D) 9

Ans: A

6

Question: 8

EBCDIC is _____ bit code

(A) 6

(B) 7

(C) 8

(D) 9

Ans: C

8

Question: 9

EBCDIC system can handle _______ characters.

(A) 32

(B) 64

(C) 128

(D) 256

Ans: D

256

Question: 10

How many megabytes does 1 GB contain?

(A) 210

(B) 220

(C) 230

(D) 240

Ans: A

210