Preview Questions Test Engineer (Electronics) | Role Specific Skill

Question 1: What is the most common cause of signal reflections in a PCB trace?

Which action should you take?

Choose only one option

Incorrect soldering

PCB material type

Impedance mismatch

Power supply ripple

Question 2: What is the purpose of a TDR (Time Domain Reflectometer) in signal integrity testing?

Which action should you take?

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To measure the power consumption of a PCB

To measure the frequency response of the PCB

To analyze the signal-to-noise ratio

To measure the impedance of a signal trace

Question 3: For accurate signal integrity testing of a high-speed digital circuit, what is the ideal setup?

Which action should you take?

Choose only one option

Frequency counter and signal generator

High-bandwidth oscilloscope with a differential probe

Basic handheld oscilloscope

Simple DMM with frequency measurement capabilities

Question 4: When analyzing a high-speed signal on an oscilloscope, which of the following factors is most important to minimize noise and achieve accurate measurements?

Which action should you take?

Choose only one option

Minimizing the oscilloscope's sample rate

Using a probe with a high bandwidth

Using a differential probe

Using a larger display

Question 5: Which of the following tests would you perform to verify the functionality of a high-power LED circuit?

Which action should you take?

Choose only one option

Verify the thermal behavior and heat dissipation rates

Test the frequency response of the circuit

Check for oscillations in the power supply

Measure the forward voltage drop and current at different loads

Question 6: How does parasitic capacitance affect signal integrity in high-speed circuits?

Which action should you take?

Choose only one option

It introduces phase shift and distortion

It increases signal strength

It reduces power consumption

It helps in signal transmission