Microsoft Embedded Engineer Interview Questions

The questions to prepare for a Microsoft Embedded Engineer interview. Questions from real interview reports rank first. Updated weekly.

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CodingStart here. 48 questions · ~506 min

Find the first non-repeating character in a string using frequency counting and a second pass in O(n) time.

Reverse Array In PlaceEasy

Practice

Reverse an array in place using a two-pointer swap approach with O(1) extra space.

ArraysTwo Pointers

Microsoft

Cycle Detection in Linked ListsEasy

Practice

Detect whether a singly linked list contains a cycle using fast and slow pointers.

Linked ListsTwo Pointers

Microsoft

Polling vs Interrupt-Driven I/OEasy

Compare polling and interrupt-driven I/O, including CPU usage, latency, complexity, and when each approach is appropriate in embedded systems.

basicsEmbedded Systemsinterrupts

Microsoft

Why Volatile Matters in Embedded CMedium

Explain how `volatile` prevents incorrect compiler optimizations on memory-mapped or asynchronously updated values.

Bit ManipulationArrays

Microsoft

Detect System Endianness in CEasy

Explain how to detect little-endian vs big-endian byte order in C using memory inspection.

Bit ManipulationArrays

Microsoft

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