DSC Lab Viva

How many selection lines required for a MUX with 32 input lines?

• 2

• 3

• 5

• 8

What is the significance of gray code?

• Commonly used code

• Single bit change between adjacent numbers

• Less bit representation

• Known as weighted code

How many flip-flops are required to construct an 8-bit register?

• 1

• 8

• 3

• 4

Identify a circuit which is a sequential circuit?

• Adder

• Multiplexer

• Magnitude Comparator

• Counter

Apart from external inputs and clock input, what is the other input of a flip-flop?

• Selection lines

• Preset

• Vcc

• Gnd

Distinguish JK flip-flop from SR flip-flop

• No change

• Set

• Reset

• Toggle

How many states in a 4 bit counter?

• 16

• 4

• 10

• 8

In a JK FF, if Q(t) is 1 and Q(t+1) is 0, what are the excitation inputs?

• J = X and K = 1

• J = 1 and K = 1

• J = 1 and K = X

• J = 0 and K = 0

Which type of K-map is used to design a Full Adder circuit?

• Three variable

• Two variable

• Four variable

• Five variable

A magnitude comparator is defined as a digital comparator which has ____________

• Three output terminals

• Two output terminals

• One output terminal

• No output terminal