State Machines - Electronic Engineering (MCQ) questions & answers

1)   Where are signals received from, at the output decoder in generalized form of Mealy circuit?

A. Input of memory elements
B. Output of memory elements
C. External inputs
D. External outputs

a. A & D
b. B & C
c. B & D
d. A & C
Answer  Explanation 

ANSWER: B & C

Explanation:
No explanation is available for this question!
2)   In the below drawn schematic, what does an arrow between the circles indicate?

a. Present state
b. Next state
c. State transition
d. Don't care condition
Answer  Explanation 

ANSWER: State transition

Explanation:
No explanation is available for this question!
3)   From the K-map given below, what would be the state equation of D Flip Flop?

a. Qn+1 = QnD
b. Qn+1 = QnD
c. Qn+1 = D
d. Qn+1 = D
Answer  Explanation 

ANSWER: Qn+1 = D

Explanation:
No explanation is available for this question!
4)   Which mechanism allocates the binary value to the states in order to reduce the cost of the combinational circuits?

a. State Reduction
b. State Minimization
c. State Assignment
d. State Evaluation
Answer  Explanation 

ANSWER: State Assignment

Explanation:
No explanation is available for this question!
5)   Which among the following state machine notations are generated outside the sequential circuits?

a. Input variables
b. Output variables
c. State variables
d. Excitation variables
Answer  Explanation 

ANSWER: Input variables

Explanation:
No explanation is available for this question!
6)   Consider the state equation given below. If R.H.S of an equation is zero, then what would be the value of L.H.S (next state) after the application of a clock pulse?

QA(n + 1)  = (QA QB  +  QA QB) x + QA QB

a. Zero
b. Infinity
c. QA QB x
d. QA QB x
Answer  Explanation 

ANSWER: Zero

Explanation:
No explanation is available for this question!
7)   From the generalized schematic of Moore circuit given below, what does the combinational circuit 'C1' known as?

a. Previous state decoder
b. Present state decoder
c. Next state decoder
d. Output state decoder
Answer  Explanation 

ANSWER: Next state decoder

Explanation:
No explanation is available for this question!
8)   According to Moore circuit, the output of synchronous sequential circuit depend/s on ______ of flip flop

a. Past state
b. Present state
c. Next state
d. External inputs
Answer  Explanation 

ANSWER: Present state

Explanation:
No explanation is available for this question!
9)   Which type of memory elements are used in synchronous sequential circuits?

a. Clocked Flip flops
b. Unclocked Flip flops
c. Time Delay Elements
d. All of the above
Answer  Explanation 

ANSWER: Clocked Flip flops

Explanation:
No explanation is available for this question!
10)   Where do/does the status of memory element in a synchronous sequential circuit get/s affected due to change in input?

a. At an active edge of clock
b. At passive edge of clock
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: At an active edge of clock

Explanation:
No explanation is available for this question!

Related Content

▲