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Qualcomm interview questions

860 questions from 68 candidate reports · 2012 to 2024

Online test → Technical → Technical → HR·78% entry level

CS fundamentals

Showing 35 of 697 reported in this area

What is the difference between a process and a thread?
asked 8×easyPractice this →
Explain the memory layout of a C program.
asked 4×mediumPractice this →
Explain storage classes in C.
asked 4×easyPractice this →
What is the volatile keyword in C?
asked 3×easyPractice this →
Explain virtual memory and paging
asked 2×mediumPractice this →
Implement your own sizeof operator
asked 2×mediumPractice this →
Explain memory layout of a process.
asked 2×mediumPractice this →
Explain the producer-consumer problem
asked 2×mediumPractice this →
Explain different CPU scheduling algorithms
asked 2×mediumPractice this →
Explain internal and external fragmentation
asked 2×mediumPractice this →
Explain OS schedulers and scheduling algorithms.
asked 2×mediumPractice this →
Explain memory management concepts in operating systems.
asked 2×mediumPractice this →
Write a program to return a stream of bytes from a function.
asked 2×mediumPractice this →
What is a page fault and what steps are followed to handle it
asked 2×mediumPractice this →
Explain deadlock situations and methods for deadlock detection and prevention.
asked 2×mediumPractice this →
What are acceleration structures in ray tracing and how do they improve performance?
asked 2×mediumPractice this →
How can data be accessed after a function returns? Explain why auto variables cannot be accessed.
asked 2×mediumPractice this →
Determine the output of C programs involving nested if-else, storage classes (register), const keyword, and pointer initialization
asked 2×mediumPractice this →
Explain double pointers and their use cases.
asked 2×easyPractice this →
Explain function overloading and function overriding.
asked 2×easyPractice this →
Explain the difference between Scheduler and Dispatcher
asked 2×easyPractice this →
What is the difference between a macro and an inline function?
asked 2×easyPractice this →
Explain the difference between singly linked list and doubly linked list
asked 2×easyPractice this →
Explain the differences between singly linked list and doubly linked list
asked 2×easyPractice this →
Explain Linear Search and compare it with other search algorithms in terms of time complexity
asked 2×easyPractice this →
Why was CDMA phased out?
asked oncemediumPractice this →
Explain structure padding in C
asked oncemediumPractice this →
Explain the Banker's Algorithm
asked oncemediumPractice this →
Explain the use of pragma in C
asked oncemediumPractice this →
Create a Singleton class in C++
asked oncemediumPractice this →
Where is the page table located?
asked oncemediumPractice this →
Explain CPU scheduling algorithms
asked oncemediumPractice this →
Explain face detection techniques.
asked oncemediumPractice this →
Explain the Diamond Problem in OOP.
asked oncemediumPractice this →
Implement your own memcpy function.
asked oncemediumPractice this →

DSA

Showing 13 of 266 reported in this area

Detect a loop in a linked list.
asked 5×easyPractice this →
Reverse a linked list
asked 4×easyPractice this →
Reverse a singly linked list.
asked 4×easyPractice this →
Implement a queue using a linked list
asked 4×easyPractice this →
Reverse bits of a number
asked 3×easyPractice this →
Print the left view of a binary tree.
asked 2×mediumPractice this →
Traverse a binary tree in spiral (zigzag) order
asked 2×mediumPractice this →
Swap two nibbles in a byte
asked 2×easyPractice this →
Explain Binary Search algorithm.
asked 2×easyPractice this →
Count the number of set bits in a given number.
asked 2×easyPractice this →
Delete a node in a binary tree.
asked oncemediumPractice this →
Detect a cycle in a linked list.
asked oncemediumPractice this →
Remove a loop from a linked list.
asked oncemediumPractice this →

Aptitude

Showing 3 of 30 reported in this area

Data interpretation questions using pie charts
asked oncemediumPractice this →
Logical reasoning questions testing analytical aptitude
asked oncemediumPractice this →
Aptitude questions involving quantitative and logical reasoning
asked oncemediumPractice this →

Puzzles

Showing 3 of 29 reported in this area

Apple and Orange basket puzzle
asked oncemediumPractice this →
Puzzle: Torch and Bridge problem
asked oncemediumPractice this →
Puzzle: Apples and Oranges problem
asked oncemediumPractice this →

System design

Showing 3 of 12 reported in this area

How would you implement ray tracing on the GPU using Vulkan ray tracing extensions?
asked 2×hardPractice this →
Design and implement file upload functionality.
asked oncemediumPractice this →
Design and draw the database schema for a project.
asked oncemediumPractice this →

Behavioural

Showing 3 of 6 reported in this area

Describe a conflict you faced in a group project and how you resolved it.
asked oncemediumPractice this →
How do you communicate with developers and stakeholders during the testing process?
asked oncemediumPractice this →
How would you respond to different workplace scenarios?
asked oncePractice this →

Showing 60 of 860 questions. Ranked by how often the same question came back across reports.

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Common questions

What questions does Qualcomm ask?

Candidate interview reports most often cover CS fundamentals (67%) and DSA (26%).

How many rounds does Qualcomm interview have?

Candidate interview reports show an average of 3.8 rounds per experience, with a typical sequence of Online test → Technical → Technical → HR. Individual interview paths can vary.

Is the Qualcomm interview hard?

Among questions with a reported difficulty, the mix is easy 39%, medium 57%, hard 4%.

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