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Turn temporal intent into executable checks

SystemVerilog Assertions Interview Questions

01
What this tests

Assertions interviews test whether you can express a temporal contract precisely and explain when it is sampled. Small syntax differences can change the cycle on which a consequent begins, whether a property passes vacuously, and how reset disables an active attempt.

02
How to practice

Start by drawing the clocked trace before choosing operators. Identify the antecedent, consequent, overlap, bounded latency, reset policy, and any environmental assumptions.

Topic breakdown

What to be ready to explain

01

Sampling and operators

Place observations in the correct clocking region and distinguish overlap, delay, repetition, and sampled-value functions.

  • Implication
  • Repetition
  • $past
  • Sampling regions
02

Reset and meaningful proof

Handle disable conditions, avoid vacuous success, and state environmental assumptions that keep checks meaningful.

  • disable iff
  • Vacuity
  • Assumptions
  • Coverage
03

Protocol properties

Decompose handshakes, FIFOs, arbitration, clock gating, and forward progress into diagnostic temporal checks.

  • Ready-valid
  • Arbitration
  • FIFO
  • Liveness

Curated practice links

Questions to work through

Permanent bank numbers and direct links make it easy to continue in the live question bank.

  1. Q177Prove an arbiter avoids deadlock and livelock

    Explain the key Deadlock and Livelock decisions, assumptions, and checks.

    Formal Verification · Hard
  2. Q293Assert an integer square-root pipeline

    Explain the key SVA and Latency decisions, assumptions, and checks.

    Temporal Checks · Easy
  3. Q167Prove an elastic one-hot checker

    Explain the key SVA and Ready/valid decisions, assumptions, and checks.

    Temporal Checks · Easy
  4. Q049Concurrent assertion scheduling

    Explain the key Scheduling regions decisions, assumptions, and checks.

    SystemVerilog · Medium
  5. Q184SystemVerilog Assertions (SVA) implication

    Explain the key Assertion timing decisions, assumptions, and checks.

    Temporal Checks · Medium
  6. Q500SVA repetition

    Explain the key Assertion timing decisions, assumptions, and checks.

    Temporal Checks · Medium
  7. Q277SystemVerilog Assertions (SVA) disable iff

    Explain the key Assertion timing decisions, assumptions, and checks.

    Temporal Checks · Medium
  8. Q707$past and nonblocking assignment (NBA) sampling

    Explain the key Advanced assertions decisions, assumptions, and checks.

    Temporal Checks · Hard
  9. Q128Vacuity

    Explain the key Advanced assertions decisions, assumptions, and checks.

    Temporal Checks · Hard
  10. Q040Sequence local variables

    Explain the key Advanced assertions decisions, assumptions, and checks.

    Temporal Checks · Hard
  11. Q1014Check a single-outstanding request/grant protocol

    Explain the key Protocol checker and Latency decisions, assumptions, and checks.

    Protocol Verification · Medium
  12. Q741Design a four-request arbiter verification environment

    Explain the key UVM and Reference model decisions, assumptions, and checks.

    Arbiters · Hard
  13. Q802Design glitch-free clock gating

    Explain the key Clock gating and ICG decisions, assumptions, and checks.

    Low-Power Design · Medium
  14. Q686Verify a synchronous FIFO

    Explain the key FIFO and Scoreboard decisions, assumptions, and checks.

    Verification · Medium
  15. Q914Check an incrementing pulse interval

    Explain the key SVA and Checker decisions, assumptions, and checks.

    Assertions · Medium
  16. Q225Design and verify a round-robin arbiter

    Explain the key Arbiter and Fairness decisions, assumptions, and checks.

    RTL Design · Hard
  17. Q125Request and acknowledge latency assertion

    Explain the key SVA and Request/acknowledge decisions, assumptions, and checks.

    Temporal Checks · Easy
  18. Q288Overlapped versus non-overlapped implication in SVA

    Explain the key SVA and Implication decisions, assumptions, and checks.

    Temporal Checks · Medium
  19. Q117Code asynchronous reset assertion with two-edge release

    Explain the key SVA and Reset decisions, assumptions, and checks.

    Clock and Reset Domains · Medium
  20. Q677Identify an asynchronous-reset recovery violation

    Explain the key SVA and Reset decisions, assumptions, and checks.

    Clock and Reset Domains · Medium
  21. Q144Resolve Read and Write Requests on a Shared Port

    Explain the key SVA and DDR decisions, assumptions, and checks.

    Protocols and Interfaces · Medium
  22. Q1046Assert stable AXI payload under backpressure

    Explain the key SVA and AXI decisions, assumptions, and checks.

    Assertions and Formal · Medium
  23. Q1008Assert bounded request-to-grant latency

    Explain the key SVA and Formal decisions, assumptions, and checks.

    Assertions and Formal · Medium
  24. Q650Implement a coordinated-reset depth-16 asynchronous FIFO

    Explain the key SVA and CDC decisions, assumptions, and checks.

    Clock and Reset Domains · Hard
  25. Q1047Derive an Almost-Full Threshold from Stop Latency

    Explain the key SVA and FIFO decisions, assumptions, and checks.

    Timing · Hard
  26. Q830Prove bounded bridge forward progress

    Explain the key Formal decisions, assumptions, and checks.

    Assertions and Formal · Hard
  27. Q933Verify a cache entering retention

    Explain the key SVA and Reset decisions, assumptions, and checks.

    Clock and Reset Domains · Hard
  28. Q166Prove clock-gating entry and wake safety

    Explain the key Formal and Clocking decisions, assumptions, and checks.

    Assertions and Formal · Hard

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