Architecture Interview Q&A Bank · arch

Computer Architecture · All levels

8topics
8lessons

This bank keeps the best questions from the seven per-part banks and the central bank. Each lesson covers one theme with complete answers and links the mechanism topics instead of repeating them.

Answer arc for architecture interview questions.

Every answer follows the same arc: metric, mechanism, experiment, change, validation.

Lesson	What it covers
Pipeline and out-of-order	Stages, hazards, branch prediction, out-of-order execution and SMT.
Caches and virtual memory	AMAT, organization, replacement, prefetching, inclusion and the TLB.
Interconnect fabric	Topology, bisection, deadlock, flow control, QoS and arbitration.
Coherence and ordering	MESI and MOESI, ordering models, litmus tests, ACE and CHI.
Performance method	Counters, bottlenecks, roofline, Amdahl and tuning guardrails.
Accelerators	Patterns, dataflow, starvation triage, locality and integration.
System tradeoffs	PPA contracts, floorplan, power, bandwidth roofs and signoff.
Behaviour and method	Answer arc, seniority, ownership, escalation and judgment.

Check yourself An interviewer asks how a cache change affected IPC. What does the first minute of the answer contain?

Workload and baseline metric, the CPI component that moved, and the cheapest experiment that separates the top two hypotheses. Mechanism detail follows only after that framing.

Up nextPipeline and Out-of-Order Questions

Practice this lesson Report an error