Which of the following is not defined by the entity?
a) Direction of any signal
b) Names of signal
c) Different ports
d) Behavior of the signals
Q.2.
Which of the following can be the name of an entity?
a) NAND
b) Nand_gate
c) Nand gate
d) AND
Q.3.
Which of the following is correct syntax for entity declaration?
a)
b)
c)
d)
Q.4.
Refer to the VHDL code given below, how many input-output pins are there in MUX entity?
ENTITY entity_name IS
PORT( signal_names : signal_modes;
signal_names : signal_modes);
END entity_name;
a) 5
b) 4
c) 3
d) 2
Q.5.
The entity name ‘xyz’ and ‘XYZ’ will be treated the same.
a) True
b) False
Q.6.
Which of the following mode of the signal is bidirectional?
a) IN
b) OUT
c) INOUT
d) BUFFER
Q.7.
In an assignment statement, OUT signal can be used only to the ___________
a) Left of <= operator
b) Right of <= operator
c) Any side of <= operator
d) Right of := operator
Q.8.
On which side of assignment operator, we can use the IN type signal?
a) Left
b) Right
c) Both
d) Can’t be used
Q.9.
What is the difference between OUT and BUFFER?
a) BUFFER can’t be used inside the entity for reading the value and OUT can be
b) BUFFER can only be read whereas OUT can only be assigned a value
c) BUFFER can be read as well as assigned a value but OUT can only be assigned
d) Both are same
Q.10.
GENERICs are not declared in the entity.
a) True
b) False
Q.11.
Which of the following is an entity declared for a full adder?
a)
b)
c)
d)
Q.12.
How to control the structure and timing of the entity can be changed?
a) By using TIME variable in the entity
b) By changing the entity declaration from time to time
c) By using some special code
d) By using GENERICS
Q.13.
Which of the following can have more than one driver?
a) IN
b) OUT
c) INOUT
d) BUFFER
Q.14.
Which of the following is the default mode for a port variable?
a) IN
b) OUT
c) INOUT
d) BUFFER
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