I got an interview call after the college career fair.

I had a first phone interview that was about 45 minutes long.

Then, I was asked for two more interviews within the next week.

I had back-to-back interviews with two different people, each lasting about an hour.

I wasn't expecting an offer, as I didn't know any "test"-related subjects. The entire last interview was about testing, but I guess they were impressed by my approach rather than my actual answers.

Phone Interview 1:

Cache Related Question (extending the question solved at career fair, the interviewer had my paper with him): Explain cache replacement policies. Which cache replacement policy is better? Show it by giving some memory accesses.

Virtual Memory Question (extension of career fair question): Explain virtual memory mechanism.

Phone Interview 2:

C++ Coding Questions: Write a swap function. Write a Fibonacci function (recursively and non-recursively).

Data Structure Questions: Explain linked list. Can you code it? (I said I don't know how to).

Phone Interview 3:

Test Related Questions: Do you know TAP controller? (I didn't at that time). If there are n inputs and m outputs, how many patterns will be needed to test the circuit completely? (I replied 2^n). Explain stuck-at fault models. (I didn't know this either). The interviewer explained the stuck-at model to me and asked how I would find if a wire is stuck at 0 or not. I didn't know the answer but tried explaining my approach (which was correct, as I learned later: activate and propagate).