Mistral Solutions embedded interview prep

Roles they hire for

• Embedded hardware-software engineer
• BSP and driver engineer

What they emphasise

• Embedded product engineering
• Defence and aerospace electronics
• BSPs and drivers

Brush up on

BSPsDevice driversFPGA interfacesEmbedded LinuxRTOS

How the rounds usually run

A typical engineering services loop for embedded roles. Companies vary by team and seniority.

Online test

• Aptitude and reasoning
• C programming, electronics and OS basics

Example: What does sizeof return for a struct with a char, an int and a char, and why?

Technical 1: C and fundamentals

• Pointers, memory, data structures in C
• Your projects and the tools you used

Example: Reverse a singly linked list in place.

Technical 2: Domain for the project

• Depends on the project: AUTOSAR, Linux drivers, RTOS or protocols
• Scenario questions from real client work

Example: Explain how you'd add a new peripheral driver in the stack you know best.

Client interview (for project roles)

• The client's own technical screen for their programme
• Communication and ownership

Example: Explain your last module's design to someone who didn't build it.

HR

• Notice period, location and compensation

Example: Are you open to onsite assignments?

Practice questions

Original questions written for Mistral Solutions's focus areas, not leaked ones.

1. How would you write a driver for an FPGA-based peripheral over a memory-mapped bus?
2. Explain how you'd bring up DDR memory on a new board.
3. Compare an RTOS and embedded Linux for a rugged defence product.
4. How do you debug a board that boots only sometimes?
5. What tests would you run before handing a BSP to a customer?

Your prep playlist

Design rounds to practise

Themes are inferred from Mistral Solutions's public product lines.