RTL / Micro-architecture Design · Interview Questions

Interview process

RTL loops open with a resume-led hiring-manager round, then technical rounds that weight live synthesizable coding, micro-architecture reasoning, and robust clocking. Coding and micro-architecture carry the most weight (~60% combined), with CDC and timing the classic make-or-break topics.

The rounds, in order

5 rounds
  1. 1

    Hiring manager round

    45–60 min · hiring manager

    Resume-led screen that also samples coding and behavioral signal

    What they ask
    • Walk through your resume, then go deep on one block you designed (~70–80%)
    • Your specific role and responsibilities versus the team's
    • A short Verilog/SystemVerilog coding question (~10%)
    • One or two behavioral prompts — ownership, deadlines (~10%)
  2. 2

    Coding round

    45–60 min · video + coding pad≈30% weight

    Clean, synthesizable Verilog/SystemVerilog

    What they ask
    • Blocking vs non-blocking and glitch-free logic
    • Code an FSM, FIFO, or arbiter live
    • Parameterized, reusable RTL
    • A small logic or algorithmic problem
  3. 3

    Micro-architecture round

    45–60 min · onsite panel≈30% weight

    Spec-to-micro-architecture and trade-offs

    What they ask
    • Turn a one-line spec into a block diagram and FSM
    • Pipeline for throughput versus latency
    • Datapath, arbiter, or interconnect design
    • Area, power, and timing trade-offs
  4. 4

    CDC & timing round

    45–60 min · onsite panel≈20% weight

    Robust clocking and timing closure

    What they ask
    • Multi-bit CDC: handshakes and async FIFOs
    • Reset synchronization and metastability
    • Fix a critical timing path (retiming, pipelining)
    • Lint and CDC signoff
  5. 5

    Behavioral round

    45 min · hiring manager / peer panel≈20% weight

    Ownership and cross-team collaboration

    What they ask
    • A hard design decision you owned
    • A cross-team dependency you managed
    • A design bug you caught before silicon
    • Thoughtful questions for the team

How to prepare

  • Resume stories: rehearse each block end to end and lead with your own role, not the team's.
  • Coding: practice turning a one-line spec into a clean FSM, FIFO, or arbiter in synthesizable RTL under time pressure.
  • Micro-architecture: be ready to trade pipelining, throughput, and area/power/timing out loud.
  • CDC: be fluent on two-flop synchronizers, handshakes, async FIFOs, and when each is safe.
  • Timing: expect a live path fix — know retiming, pipelining, and logic-restructuring trade-offs.

Practice these sub-domains

Drill leveled questions for each area of the RTL / Micro-architecture Design loop.