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Learning/Knowledge checks/SystemVerilog Design and Verification/Constrained randomization/Check

Module checkpoint

Constrained randomization knowledge check

Answer every question from your current understanding. After submission, compare your reasoning with the explanation and revisit any weak concept.

This check covers Constrained randomization. Read it first if you have not.

5 QuestionsOne Answer eachImmediate ScoreDetailed Explanations

Read→Reason→Select→Review

Question 1 of 5How does a randc variable differ from a rand variable?

It visits every value once before repeatingIt is solved after all rand variablesIt can only be one bit wide

Question 2 of 5What happens to rand fields when randomize() returns 0?

They are set to xThey are set to zeroThey keep their previous values

Question 3 of 5Are the expressions in a constraint block executed in order?

Yes; from bottom to topNo; all active constraints are solved togetherYes; from top to bottom

Question 4 of 5What is post_randomize() typically used for?

Computing derived non-random fields such as a checksumDisabling constraints permanentlyChoosing the simulator seed

Question 5 of 5Why must the seed of a random test be logged?

To make the test run fasterTo enable functional coverageTo rerun a failing test with the same stimulus

Review every selection before submitting. You can retry after reading the explanations.

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