Hardware Test Engineer Interview Questions | Glassdoor

Hardware Test Engineer Interview Questions

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how would you test a RAM ?

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You would write to and read from every memory block. For example, in an 8-bit RAM chip you could write 0x55 to address block 0 and then read it from address block 0 to verify that the data written matches the data read. Next you would write 0xAA to the same address to toggle all the bits and run through the same read/write cycle. Continue for all RAM memory blocks of the data read always matches your RAM is good.

To structurally test the memory, there are well established algorithms such as checkerboard, walking 1/0, moving inversion etc. that are used. It is also necessary to check addressing muxes to ensure correct access to memory locations. You also want to check functional behavior of memory (though only during validation, not needed for mfg....you use structural tests for that).

If the input signal to an ADC is a perfect sine wave but the output spectrum of the ADC shows significant odd harmonics, what is wrong with the ADC?

1 Answer

Derive the differential equations of motion for a given mechanical system and calculate the transfer function.

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Converting NAND gate into NOT , how would you test a buffer using ocilloscope and other devices

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C function to detect odd number, detect if number is odd , calculate characters in string

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Give me three reasons why I should hire you.

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they described the position requirements and asked about relevant experience to those requirements. the questions they asked indicated they did an accurate professional profile match to the position requirements.

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C/C++ programming questions which weren't really hard.

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Asked to identify various electrical components, tools, data sheets, etc.

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Written skills test

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