Qualcomm (Hyderabad) HR contacted me through the Naukri website. The process took one week.

For me, there were a total of 2 interview rounds:

1. Technical & Coding (2:30 Hours)
2. Technical + Managerial (1 Hour)

1st Round - 1:30 Hour

Operating System

1. Deadlock in OS
2. Semaphores: explain, features
3. Mutex vs. Semaphore
4. Explain Kernel functions in OS
5. How many types of signals are in OS? Signal handling
6. Differentiate between process and thread

Concepts in C programming

1. Compilation stages in C
2. Storage classes in C

OOPs concepts

1. Explain OOPs with an example: class, object, Polymorphism, Encapsulation, Inheritance, Data Abstraction
2. Explain briefly about Encapsulation and Abstraction

Python Coding Round

1. Sum of two numbers using a memoizing function in Python
2. Toggle the nth bit of a number
3. Break a list into chunks of Nth size

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2nd Round - 1 Hour

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Python Coding Round

1. Shift the last two elements to the first position in a Python list. Example: input = [1, 2, -6, 8] output = [-6, 8, 1, 2]
2. Explain time complexity
3. Remove all special characters and spaces, use lower/upper case, and check if a given string is a palindrome. Example: string = "Was it a Car or a cat I saw ?"
4. Merge two sorted linked lists in Python [DSA]

3rd Round - 1 Hour [Technical + Managerial]

1. Explain project

Python Coding Round

1. Read your resume file, search for a particular pattern, count occurrences, and print complete lines containing the pattern.

Operating System

1. Explain interrupts in OS with an example