Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q781: What is the output equation in a Moore Machine?
- A: Dependent on current state only
- B: Dependent on input only
- C: Dependent on current state and input
- D: Not dependent on state
View Answer
A
Q782: What is the purpose of a transition table in a state machine?
- A: Design circuit layout
- B: Describe state changes
- C: Implement logic gates
- D: Optimize clock signal
View Answer
B
Q783: In the J-K flip-flop based state machine, which inputs determine the next state?
- A: Q0, Q1
- B: X, Y
- C: J, K
- D: CLK, TRSTATE
View Answer
B
Q784: What is the output equation for the Mealy machine derived from the state table?
- A: Z=XQ0Q1+YQ0Q1Z = XQ0Q1 + YQ0Q1Z=XQ0Q1+YQ0Q1
- B: MAX=Q0Q1ENMAX = Q0Q1ENMAX=Q0Q1EN
- C: D1=Q1EN+Q0Q1END1 = Q1EN + Q0Q1END1=Q1EN+Q0Q1EN
- D: TRSTATE.CLK=clkTRSTATE.CLK = clkTRSTATE.CLK=clk
View Answer
A
Q785: Which of the following states causes both NSRED and EWRED to be on?
- A: NSG
- B: EWG
- C: NSR
- D: EWY
View Answer
C
Q786: What kind of flip-flops are used in the example of the clocked synchronous state machine?
- A: S-R flip-flops
- B: J-K flip-flops
- C: T flip-flops
- D: D flip-flops
View Answer
D
Q787: In a Mealy state machine, what happens when the input ENABLE is 1?
- A: State machine resets
- B: State machine counts
- C: Outputs remain the same
- D: Outputs switch off
View Answer
B
Q788: What happens when the MANUAL input is not activated in the traffic light controller?
- A: Flashing of Yellow lights
- B: Traffic lights turn off
- C: Normal operation
- D: Timer resets
View Answer
C
Q789: How many inputs does the D flip-flop have in the provided state machine example?
- A: 1
- B: 2
- C: 3
- D: 4
View Answer
A
Q790: What is the smallest unit of binary data in memory?
- A: Bit
- B: Byte
- C: Nibble
- D: Word
View Answer
A