Preview Questions Hardware Engineer | Role Specific Skill

Question 1: When designing a hardware-accelerated FFT engine, which technique minimizes hardware resource usage while preserving throughput?

Which action should you take?

Choose only one option

Storing all twiddle factors in separate on-chip ROM blocks

Using a fully parallel butterfly structure

Time-multiplexing butterfly units and implementing a radix-2 pipelined architecture

Implementing a brute-force DFT without FFT decompositions

Question 2: Which method is most effective for debugging hardware-software integration issues?

Which action should you take?

Choose only one option

Replace hardware components

Perform power-on self-tests

Use a protocol analyzer

Check physical connections

Question 3: When refining a prototype that incorporates BGA packages, what technique is most effective to identify and rework a single faulty ball connection?

Which action should you take?

Choose only one option

Using hot-air reflow over the entire component

Applying local mechanical pressure with a probe

Employing X-ray inspection and targeted reballing

Solder wick to remove the BGA and attempt a second placement

Question 4: When performing system-level EMC/EMI compliance testing, what step ensures the integrated system meets regulatory standards?

Which action should you take?

Choose only one option

Conduct pre-compliance EMI scans on the fully integrated system and apply filtering/grounding improvements

Only test individual modules for EMI and assume system integration doesn't change emissions

Ignore cable shielding

Trust module-level EMC specs without system tests

Question 5: Which tool is used for thermal analysis in PCB design?

Which action should you take?

Choose only one option

Ansys ICEPAK

SPICE

Cadence Allegro

Eagle

Question 6: In a pipeline ADC signal chain, what advanced digital signal processing technique helps correct for nonlinearities and mismatches in the stages to achieve higher effective number of bits (ENOB)?

Which action should you take?

Choose only one option

Simple averaging

Hysteresis comparator adjustments

Static offset trimming

Adaptive LMS-based calibration