Explore topic-wise MCQs in Vhdl.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Vhdl knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the use of s’TRANSACTION attribute?

A. Check the continuity
B. Check the hold time
C. Interrupt handling by using WAIT
D. Create a square wave
Answer» D. Create a square wave
Discussion
2.

The attribute s’TRANSACTION creates a signal of type ______

A. BOOLEAN
B. BIT
C. INTEGER
D. Same as signal s
Answer» C. INTEGER
Discussion
3.

Which of the following statement is correct to check the violation of hold time?

A. IF(clk’DELAYED(hold_time)’EVENT) THEN
B. IF(clk’DELAYED(hold_time) = ‘1’) THEN
C. IF(clk’DELAYED(hold_time) = ‘0’) THEN
D. IF(clk’DELAYED(hold_time) = ‘1’ AND clk’DELAYED(hold_tim
E. ’EVENT) THENb) IF(clk’DELAYED(hold_time) = ‘1’) THENc) IF(clk’DELAYED(hold_time) = ‘0’) THENd) IF(clk’DELAYED(hold_time) = ‘1’ AND clk’DELAYED(hold_time)’EVENT) THEN
Answer» E. ’EVENT) THENb) IF(clk’DELAYED(hold_time) = ‘1’) THENc) IF(clk’DELAYED(hold_time) = ‘0’) THENd) IF(clk’DELAYED(hold_time) = ‘1’ AND clk’DELAYED(hold_time)’EVENT) THEN
Discussion
4.

What is the type of value returned by the s’DELAYED(time) attribute?

A. TIME
B. BOOLEAN
C. INTEGER
D. Same as signal s
E. attribute?a) TIMEb) BOOLEANc) INTEGERd) Same as signal s
Answer» E. attribute?a) TIMEb) BOOLEANc) INTEGERd) Same as signal s
Discussion
5.

Attribute s‘LAST_EVENT has a return value of ______ type.

A. BOOLEAN
B. TIME
C. INTEGER
D. Same as signal s type
Answer» C. INTEGER
Discussion
6.

s’ACTIVE will return true if _________

A. Any transition from 0 to 1 on signal s during the current delta
B. Any transition from 1 to 0 on signal s during the current delta
C. Any change has occurred on the signal s during last 2 delta’s
D. Any change has occurred on the signal s during the current delta
Answer» E.
Discussion
7.

Refer to the statement given below, it is used for detecting _________

A. Rising edge of the clock signal
B. Falling edge of the clock signal
C. Clock signal frequency
D. Time period of clock signalView Answer
Answer» C. Clock signal frequency
Discussion
8.

Signal kind attributes can’t have variables as their objects.

A. True
B. False
Answer» B. False
Discussion
9.

WHICH_OF_THE_FOLLOWING_STATEMENT_IS_CORRECT_TO_CHECK_THE_VIOLATION_OF_HOLD_TIME??$

A. IF(clk’DELAYED(hold_time)’EVENT) THEN
B. IF(clk’DELAYED(hold_time) = ‘1’) THEN
C. IF(clk’DELAYED(hold_time) = ‘0’) THEN
D. IF(clk’DELAYED(hold_time) = ‘1’ AND clk’DELAYED(hold_time)’EVENT) THEN
Answer» C. IF(clk‚Äö√Ñ√∂‚àö√ë‚àö¬•DELAYED(hold_time) = ‚Äö√Ñ√∂‚àö√ë‚àö‚â§0‚Äö√Ñ√∂‚àö√ë‚àö¬•) THEN
Discussion
10.

The attribute s’TRANSACTION creates a signal of type ______$#

A. BOOLEAN
B. BIT
C. INTEGER
D. Same as signal s
Answer» D. Same as signal s
Discussion
11.

What is the type of value returned by the s’DELAYED(time) attribute?#

A. TIME
B. BOOLEAN
C. INTEGER
D. Same as signal s
Answer» E.
Discussion
12.

Attribute s‘LAST_EVENT has a return value of ______ type.$

A. BOOLEAN
B. TIME
C. INTEGER
D. Same as signal s type
Answer» E.
Discussion
13.

s’ACTIVE will return true if _________$

A. Any transition from 0 to 1 on signal s during the current delta
B. Any transition from 1 to 0 on signal s during the current delta
C. Any change has occurred on the signal s during last 2 delta’s
D. Any change has occurred on the signal s during the current delta
Answer» C. Any change has occurred on the signal s during last 2 delta‚Äö√Ñ√∂‚àö√ë‚àö¬•s
Discussion
14.

Signal kind attributes can’t have variables as their objects.$

A. True
B. False
Answer» B. False
Discussion
15.

Which of the following returns the Boolean type always?

A. ‘LAST_VALUE
B. ‘LAST_EVENT
C. ‘EVENT
D. ‘STABLE
Answer» D. ‚Äö√Ñ√∂‚àö√ë‚àö‚â§STABLE
Discussion
16.

What is the basic use of signal kind attributes?

A. To check any event on signals
B. To check if a function is called
C. To check if a signal is IN or OUT mode
D. To check a clock signal
Answer» B. To check if a function is called
Discussion