Qualcomm SDE-2 Interview Questions, Process, and Tips

Round duration - 90 Minutes
Round difficulty - Medium

DS, ALgo & Operating systems.

Q1. OS Question
What is a race condition?
Ans. 
Took an example of a transaction, explained how the results can be different based on the order of execution of the instructions.
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Q2. OS Question
Difference between mutex and semaphore?
Ans. 
Very important question, asked a lot in interviews.
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Q3. Power of Two
You have been given an integer 'N'. Your task is to return true if it is a power of two. Otherwise, return false.
An integer 'N' is a power of two, if it can be expressed as ...read more
Ans. 
I started with a while loop kind of program. The interviewer tried to run some corner cases as well but
my code was correct. So he asked me to optimize it further since it was taking O(logn). Then he made me write binary values for 4,8,12 and after that, he said can u deduce some logic from this? Then I
found the correct logic. He was very happy with this.
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Round duration - 100 Minutes
Round difficulty - Medium

Focus on projects, Computer Architecture.

Round duration - 30 Minutes
Round difficulty - Easy