Senior Firmware Engineer Interview Questions

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“Given a cube made of NxN sub cubes, find the number of cubes that are no exposed to the outside.”

“How to invert all the bits in a byte? e.g. 0x55 should be changed to 0xAA.”

“You are in one room with three light switches, only one of which controls a light in another room. All the switches are in the off positiona and the light is currently off. You have one opportunity…”

“Technical C programming and logic questions.”

“If a SATA drive is pulled off from an mid-level SAS expander to which the device is connected using SATA bridge and if the SATA drive is inserted back into the expander, how does the Host software…”

“most "difficult" was a discussion of an IO driver, embracing merits/demerits of implementation methods, including polled v's interrupt, OS impact, buffering, layering etc”

“The interview was conducted in a conference room with a white board. The hiring manager was present along with two engineers. From the onset, one of the engineers seemed hostile towards me.


“A co-worker said he was asked if he is more comfortable in the time domain or position domain.”

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