Quiz-1

Minimum number of 2:1 multiplexers required to implement a 16:1 multiplexer

• 8

• 11

• 15

• 16

Boolean expression for the output of following logic circuit is

• Y= A B' C+A B C

• Y= A B' C+A B C'

• Y= A B' C'+A' B C

• Y= A' B' C+A B C'

Four books have cost of (1000)5, (1000)6, (1000)8 and (1000)16. What will be the cost of all four books in total?

• (4949)10

• (8049)10

• (4000)10

• (5049)10

Decimal ranges of 1's and 2's compliment numbers which can be represented using 7 bits are

• 0 to 127 and -64 to 63

• -63 to 63 and -64 to 63

• 0 to 127 and -64 to 64

• -64 to 63 and -64 to 63

Boolean function of following circuit is

• f(x,y,z)= {1, 2, 5, 6}

• f(x,y,z)= {0, 2, 5, 7}

• f(x,y,z)= {1, 2, 4, 6, 7}

• f(x,y,z)= {0,1, 2,3, 6}

How many minimum number of  binary bits will be required to represent the smallest and biggest 4 digit decimal numbers respectively?

• 10 and 15

• 8 and 16

• 10 and 14

• 7 and 13

Number of  AND gates to implement a 16 : 1 multiplexer and OR gates  to implement a Hexadecimal-to-binary encoder are respectively

• 16, 8

• 8, 16

• 4, 16

• 16, 4

A common bus which shares the data from 8 registers, each of  width of 4-bit, can be implemented by using

• a decoder of size 3:8 and 12 tri-state buffers

• a encoder of size 8:3 and 32 tri-state buffers

• a encoder of size 8:3 and 8 tri-state buffers

• a decoder of size 3:8 and 32 tri-state buffers

To realize an adder that can add two 16-bit numbers, how many full adders and half adders are required?

• 10 half-adders and 17 full adders

• 10 half-adders and 15 full adders

• 15 half-adders and 1 full adders

• 1 half-adders and 15 full adders

How many AND, OR and XOR gates are required for the configuration of 32-bit ripple carry adder using full adder respectively?

• 64, 64, 64

• 64, 32, 64

• 32, 32, 64

• 64, 0, 64