VHDL Mock Test 6 - Sanfoundry

10%

Question 1 of 10

1. What is the most important use of STD_LOGIC_1164 package?

To use concurrent code

To define and use parallel operations

To use sequential code

Multi value logic system

Question 1 of 10

Question 2 of 10

2. Which of the following sequential statement can’t be used in a function?

LOOP

WAIT

CASE

Question 2 of 10

Question 3 of 10

3. The function is called from the ________

Main code

Package

Library

Function itself

Question 3 of 10

Question 4 of 10

4. A package may consist of _________ design units.

Question 4 of 10

Question 5 of 10

5. Among the four packages given below, which is the most used package of VHDL?

TEXTIO

STD_LOGIC_ARITH

STD_LOGIC_1164

NUMERIC_STD

Question 5 of 10

Question 6 of 10

6. TEXTIO package is included in the code by default.

False

True

Question 6 of 10

Question 7 of 10

7. Which of the following can’t be the parameter of function?

SIGNAL a, b : IN STD_LOGIC
VARIABLE c : INTEGER
CONSTANT d : INTEGER

Question 7 of 10

Question 8 of 10

8. In the following code, which of the lines corresponds to the function call and function definition?

L1 : ARCHITECTURE adder OF adder IS
L2 : BEGIN
L3 : x <= sum ( SIGNAL a : STD_LOGIC; SIGNAL b : STD_LOGIC);
L4 : END adder;
L5 : FUNCTION sum ( SIGNAL a : STD_LOGIC; SIGNAL b : STD_LOGIC) RETURN STD_LOGIC IS
L6 : VARIABLE c : INTEGER;
L7 : BEGIN
L8 : c<= a OR b;
L9 : RETURN c;
L10 : END sum;

L3, L7

L5, L9

L3, L5

L5, L3

Question 8 of 10

Question 9 of 10

9. Which of the following is not the legal name of a function?

my_func

then

abc

Question 9 of 10

Question 10 of 10

10. A resolution function is invoked when ________

Any of the driver changes its value

The signal is assigned a second value

All the drivers has changed their value for once at least

The signal is assigned multiple values

Question 10 of 10