Eaton embedded interview prep

Roles they hire for

• Embedded firmware engineer (power management)
• Embedded validation engineer

What they emphasise

• Power management and electrical products
• Large engineering centre in Pune
• Industrial communication protocols

Brush up on

ModbusPower electronics controlIEC 61508Embedded CValidation

How the rounds usually run

A typical regulated product loop for embedded roles. Companies vary by team and seniority.

Recruiter or hiring-manager screen

• Background in regulated or safety-critical work
• Role fit

Example: Have you worked under a formal development process? Which one?

Technical 1: C, RTOS and state machines

• Embedded C and RTOS fundamentals
• State machine design and implementation

Example: Implement a table-driven state machine in C and explain how you'd test every transition.

Technical 2: Safety and design

• Fault detection, safe states and recovery
• Risk analysis and software FMEA
• Verification and traceability

Example: How would you detect a stuck sensor reading?

Panel: cross-functional

• Working with systems, hardware and quality engineers
• Handling changes under change control

Example: A hardware change lands late. How do you assess its impact on certified firmware?

HR

• Motivation and values
• Logistics

Example: Why do you want to work on medical or industrial devices?

Practice questions

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

1. Design firmware for a UPS that switches to battery within milliseconds.
2. How do you measure AC voltage and current with an MCU?
3. Write test cases for a circuit breaker's trip logic.
4. How would you add Modbus TCP to an existing product safely?
5. How do you protect firmware from noisy industrial environments?

Your prep playlist

Design rounds to practise

Themes are inferred from Eaton's public product lines.