vhdl mcq

1. 1 Refer to VHDL code and identify the logic
LIBRARYieee;
USE ieee.std_logic_1164.all;
ENTITYpriority IS
PORT( w : INSTD_LOGIC_VECTOR(3DOWNTO0);
y : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
z : OUT STD_LOGIC);
END priority;
ARCHITECTUREBehavior OF priority IS
BEGIN
PROCESS ( w )
BEGIN
IF w(3) = '1' THEN
y <= "11" ;
ELSIF w(2) ='1' THEN
y <= "10" ;
ELSIF w(1) ='1' THEN
y <= "01" ;
ELSE
y <= "00" ;
END IF ;
END PROCESS ;
z <= '0' WHEN w = "0000" ELSE'1';
END Behavior ;
2-bitpriorityencoder
2 Among the VHDL features, which language statements are executed
at the same time in parallel flow?
a. Concurrent
b. Sequential
c. Net-list
d. Test-bench
concurrent
3 In Net-list language, the net-list is generated _______synthesizing
VHDL code.
a. Before
b. At the time of (during)

2. c. After
d. None of the above
After
4 Which data type in VHDL is non synthesizable & allows the designer
to model the objects of dynamic nature?
a. Scalar
b. Access
c. Composite
d. File
access
5 In the simulation process, which step specifies the conversion of
VHDL intermediate code so that it can be used by the simulator?
a. Compilation
b. Elaboration
c. Initialization
d. Execution
Elaboration
6 Hold time is defined as the time required for the data to ________ after
the triggering edge of clock.
a. Increase
b. Decrease
c. Remain stable
d. All of the above
remainstable
7 An Antifuse programming technology is predominantly associated
with _____.
a. SPLDs
b. FPGAs
c. CPLDs
d. All of the above
FPGAs
8 In fusible link technologies, the undesired fuses are removed by the
pulse application of _____voltage & current to device input.
a. Low
b. Moderate

3. c. High
d. All of the above
High
9 The utilization of CAD tools for drawing timing waveform diagram
and transforming it into a network of logic gates is known as ________.
a. Waveform Editor
b. Waveform Estimator
c. Waveform Simulator
d. Waveform Evaluator
waveformeditor
10 State box without decision and conditional box is
A. ASM block
B. defined block
C. simple block
D. both a and b
Simple block
11
Table that is not a part of asynchronous analysis procedure is
a. transition table
b. state table
c. flow table
d. excitation table
d