Post Silicon Validation Interview Questions

78 post silicon validation interview questions shared by candidates

1) Software FIFO implementation and follow ups based on that, how to make it generic to any datatype, etc 2) Embedded C fundamentals - bit manipulation, register accessing, type casting, pointers, etc 3) Focus on microcontroller architecture and high level overview of what goes on in the hardware in certain scenarios
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Senior Post Silicon Validation Engineer

Interviewed at Graphcore

4.5
Feb 2, 2026

1) Software FIFO implementation and follow ups based on that, how to make it generic to any datatype, etc 2) Embedded C fundamentals - bit manipulation, register accessing, type casting, pointers, etc 3) Focus on microcontroller architecture and high level overview of what goes on in the hardware in certain scenarios

Questions on TLB, Caches, Virtual Memory ,OOO pipelines. Advantages of inclusive and NINE caches. Difference between const int *ptr and int * const ptr. Bit manipulation questions - set nth bit, replace a 16th to 13th bits by some other number. Find if the given number is a power of 2. Different types of locks. How is atomicity implemented? (LLSC). Cache Coherence. Why is dirty sharing done? Questions on BIOS.
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Post Silicon Validation

Interviewed at Apple

4.1
Jun 7, 2018

Questions on TLB, Caches, Virtual Memory ,OOO pipelines. Advantages of inclusive and NINE caches. Difference between const int *ptr and int * const ptr. Bit manipulation questions - set nth bit, replace a 16th to 13th bits by some other number. Find if the given number is a power of 2. Different types of locks. How is atomicity implemented? (LLSC). Cache Coherence. Why is dirty sharing done? Questions on BIOS.

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