Number System in Digital logic PYQ quiz GATE CS

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Question 1

The smallest integer that can be represented by an 8-bit number in 2’s complement form is

  • -256

  • -128

  • -127

  • 0

Question 2

P is a 16-bit signed integer. The 2's complement representation of P is (F87B)16.The 2's complement representation of 8*P
 

  • (C3D8)16
     

  • (187B)16
     

  • (F878)16
     

  • (987B)16
     

Question 3

What is the minimum number of gates required to implement the Boolean function (AB+C) if we have to use only 2-input NOR gates?

  • 2

  • 3

  • 4

  • 5

Question 4

(1217)8 is equivalent to

  • (1217)16

  • (028F)16

  • (2297)10

  • (0B17)16

Question 5

The hexadecimal representation of 6578 is

  • 1AF

  • D78

  • D71

  • 32F

Question 6

Let R1 and R2 be two 4-bit registers that store numbers in 2’s complement form. For the operation R1+R2, which one of the following values of R1 and R2 gives an arithmetic overflow?

  • R1 = 1011 and R2 = 1110

  • R1 = 1100 and R2 = 1010

  • R1 = 0011 and R2 = 0100

  • R1 = 1001 and R2 = 1111

Question 7

If x and y are two decimal digits and (0.1101)2 = (0.8xy5)10, the decimal value of x+y is _____ .

  • 3

  • 4

  • 1

  • 2

Question 8

Let the representation of a number in base 3 be 210. What is the hexadecimal representation of the number?

  • 15

  • 21

  • D2

  • 528

Question 9

Let X be the number of distinct 16-bit integers in 2’s complement representation. Let Y be the number of distinct 16-bit integers in sign magnitude representation. Then X −Y is _________ [This Question was originally a Fill-in-the-blanks Question]

  • 1

  • 2

  • 3

  • 0

Question 10

We want to design a synchronous counter that counts the sequence 0-1-0-2-0-3 and then repeats. The minimum number of J-K flip-flops required to implement this counter is   Note : This question was asked as Numerical Answer Type.

  • 1

  • 2

  • 4

  • 5

There are 41 questions to complete.

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