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
Hiring manager round
45–60 min · hiring managerResume-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
Coding round
45–60 min · video + coding pad≈30% weightClean, 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
Micro-architecture round
45–60 min · onsite panel≈30% weightSpec-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
CDC & timing round
45–60 min · onsite panel≈20% weightRobust 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
Behavioral round
45 min · hiring manager / peer panel≈20% weightOwnership 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.