Data representation

Question 1

Types

Answer 1

Signed and unsigned

Question 2

Types of signed

Answer 2

Signed magnitude, 1’s complement, 2’s complement

Question 3

Unsigned representation is only used for?

Answer 3

Positive nos.

Question 4

Range with n digits(unsigned)

Answer 4

0 to 2^n -1

Question 5

Signed no. representation

Answer 5

Sign bit=0 for +ve no. (+5= 0101 or 00000101)
Sign bit=1 for -ve no. (-5= 1101 or 10000101)

Question 6

Range with n digits(signed)

Answer 6

-(2^n-1 - 1) to (2^n-1 -1) +0 and -0 has two different representations

Question 7

1’s complement representation

Answer 7

+ve nos. represented as it is with MSB 0
-ve are represented by flipping bits of +ve representation
+5-00000101
-5-11111010

Question 8

1’s complement representation w n bits

Answer 8

-(2^n-1 -1) to +(2^n-1 -1)
-0 and +0 present

Question 9

2’s complement representation

Answer 9

+ve nos. as it is
-ve nos. by adding 1 to 1’s complement