Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Chapter: 38
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
Correct Answer:
A
Chapter: 38
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
Correct Answer:
B
Chapter: 38
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
Correct Answer:
B
Chapter: 38
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
Correct Answer:
A
Chapter: 38
Q785:
Which of the following states causes both NSRED and EWRED to be on?
A. NSG
B. EWG
C. NSR
D. EWY
Correct Answer:
C
Chapter: 38
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
Correct Answer:
D
Chapter: 38
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
Correct Answer:
B
Chapter: 38
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
Correct Answer:
C
Chapter: 38
Q789:
How many inputs does the D flip-flop have in the provided state machine example?
A. 1
B. 2
C. 3
D. 4
Correct Answer:
A
Chapter: 39
Q790:
What is the smallest unit of binary data in memory?
A. Bit
B. Byte
C. Nibble
D. Word
Correct Answer:
A
Chapter: 39
Q791:
How many bits are there in a Nibble?
A. 2
B. 4
C. 8
D. 16
Correct Answer:
B
Chapter: 39
Q792:
What is the size of a byte in terms of bits?
A. 4
B. 8
C. 16
D. 32
Correct Answer:
B
Chapter: 39
Q793:
What does a Word consist of in memory storage?
A. One byte
B. Two nibbles
C. One bit
D. One or more bytes
Correct Answer:
D
Chapter: 39
Q794:
How many bits does a memory cell store?
A. zero
B. 1
C. 2
D. 8
Correct Answer:
B
Chapter: 39
Q795:
In a 64-cell memory array, how is each cell identified?
A. By its size
B. By row and column
C. By bit value
D. By data stored
Correct Answer:
B
Chapter: 39
Q796:
What is the storage capacity of an 8 x 8 memory array?
A. 16 bits
B. 32 bytes
C. 8 bytes
D. 64 bytes
Correct Answer:
C
Chapter: 39
Q797:
What is a memory array organized as 4 x 16 called?
A. 4-bit memory
B. 16 Nibble memory
C. 4-byte memory
D. 64-bit memory
Correct Answer:
B
Chapter: 39
Q798:
How is a 64-bit memory array organized?
A. 1 x 64
B. 4 x 16
C. 8 x 8
D. 16 x 4
Correct Answer:
A
Chapter: 39
Q799:
How many bytes does a 16 K x 8 memory store?
A. 16 KB
B. 32 KB
C. 16384 bytes
D. 32768 bytes
Correct Answer:
C
Chapter: 39
Q800:
What is the storage capacity of a 32 K x 4 memory?
A. 32768 bits
B. 16384 bytes
C. 32768 nibbles
D. 131072 bytes
Correct Answer:
C