Digital Design Quiz 1

• What action can be taken to disable the randomization of any random variable?​

• Constraint the variable to "0"

• Set rand_mode of variable to "0"

• Override in post_randomize function

• Set constraint_mode to "0"

• What will be the value of var after below randomization?​

rand bit [7:0] var;​

constraint var_valid {!(var inside {[10:30]};);}​

• Less than 10

• Greater than 30

• Less than 10 or greater than 30

• Between 10 and 30

• Considering the given circuit, which switching leads to a dynamic hazard?​

• • a=0>1, b=1, c=0, d=1​

• a=0>1, b=1, c=0, d=0

• • a=1, b=0, c=1, d=0>1​

• a=0, b=1, c=0, d=0>1

A verification engineer is interested in defining a variable to solve his constraints to iterates over all values in a given range without repetition of numbers as shown in the below diagram . Which of the following modifiers best suits for his requirement?

• rand

• $random

• constraint

• randc

• Which of the following statement/statements are correct regarding the final procedure?

• The final procedure doesn't take simulation time

• A final procedure shall execute after any PLI callbacks that indicate the end of simulation.

• The final procedure only triggers once in a simulation

• $finish can be executed within a final procedure

• In 2’s complement representation the number 11011101 represents the decimal number​

• -43

• -21

• -35

• Answer is missing

• Which statement/statements are correct about the decade counter​

• It counts through 9 states

• It skips counting binary steps from 1010 to 1111

• It counts only up to 1001 in binary

• To set the counter output to zero, the reset line must be set to high

Consider the given equation. Which could be the value of "x"?

• 8

• 10

• 7

• Answer is missing

A serially-fed shift register takes 40 micro-seconds to enter 8-bits. What could be the clock frequency?

• 25kHz

• 3125Hz

• 200kHz

• 1600kHz

Which of the following circuit diagrams are equivalent to the code given?

• 
• 
• 
•