Preview Questions Hardware Engineer | Role Specific Skill

Question 1: When designing a power supply circuit, why is it crucial to choose the correct filter capacitor?

Which action should you take?

Choose only one option

To protect the input from noise

To regulate the output voltage

To prevent voltage spikes from damaging the circuit

To smooth the rectified AC voltage

Question 2: Why is an anti-aliasing filter used in ADC systems?

Which action should you take?

Choose only one option

To limit signal frequencies before sampling

To amplify high frequencies

To enhance quantization

To increase sampling rate

Question 3: What is the effect of parasitic inductance in PCB layout design for high-speed circuits?

Which action should you take?

Choose only one option

It reduces the overall impedance

It increases the signal integrity

It decreases the signal rise time

It increases the capacitive coupling between traces

Question 4: Which parameter should be prioritized when designing differential pairs?

Which action should you take?

Choose only one option

Wide trace width

Matched trace length

Low resistance

High impedance

Question 5: In advanced EMI/EMC-compliant power electronics boards, which circuit-level strategy most effectively reduces conducted emissions?

Which action should you take?

Choose only one option

Inserting a Pi-filter on the power input line

Adding more bypass capacitors on the load side

Increasing switching frequency to the MHz range

Reducing PCB copper thickness in power traces

Question 6: When building a prototype that includes high-density connectors, what is the most reliable method to validate contact integrity under mechanical stress?

Which action should you take?

Choose only one option

Rely on the fit feeling when inserting the cable

Assume the connector manufacturer's specs are sufficient

Perform a simple continuity test once

Perform mechanical strain testing and continuity checks under load