Dexcom Embedded Engineer Interview Questions

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

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CodingStart here. 11 questions · ~93 min

Explain how volatile, const, and static affect optimization, mutability, storage duration, and linkage in C.

Compare SPI I2C and UARTMedium

Explain how SPI, I2C, and UART differ in speed, wiring, framing, and typical embedded use cases.

uartcommunication protocolsi2c

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Technical Fundamentals3 questions · ~25 min

Ultra-Low Power Idle OptimizationMedium

Tests your approach to power management and design choices that reduce idle energy use.

power optimizationEmbedded Systemstechnical experience

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Unit Testing Hardware-Interfacing CodeMedium

Tests your testing strategy for embedded code, including abstraction and isolation of hardware dependencies.

code qualityTesting

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Behavioral & Leadership6 questions · ~51 min

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More topics4 questions · ~34 min

Tests technical ownership and communication through a concrete architecture decision, with emphasis on trade-offs, judgment, and lessons learned.

Basic C Coding FundamentalsEasy

Evaluates your practical command of core C concepts used in embedded firmware.

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Watchdog for Graceful RecoveryHard

Tests your ability to design robust fault recovery for medical-grade embedded systems.

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Embedded Knowledge BasicsEasy

Assesses whether you have foundational embedded knowledge relevant to building reliable firmware.

Embedded Systems

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