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Rejected

Engineer (C++) at Qualcomm

Difficulty
Process took
2-3 Weeks
Rounds
3
Format
Hybrid
Applied via
Referral

How it went

  • If the interviewer challenges your responses, don’t panic. Clarify your reasoning, and be open to discussing alternatives.
  • Interviews can be challenging, but staying calm under pressure and clearly explaining your thought process is key.

What they would tell you

  • If the interviewer challenges your responses, don’t panic. Clarify your reasoning, and be open to discussing alternatives.
  • Interviews can be challenging, but staying calm under pressure and clearly explaining your thought process is key.

How to prepare

  • Make sure you're comfortable explaining virtual memory, thrashing, defragmentation, and other memory management topics. Brush up on OS theory.
  • Practice object-oriented design patterns like Singleton, Factory, and Observer. Learn how to discuss scalability, maintainability, and the trade-offs involved in system design.

Round by round

  1. 1

    Technical Problem Solving60 min

    The interview started with a brief introduction, and then the interviewer moved straight into problem-solving. The first problem was finding the maximum element in a binary tree, followed by another challenging problem Binary Tree Maximum Path Sum. Both were standard questions and felt manageable. After solving them, the interviewer asked a third question related to Asteroid Collision.

    • Binary Tree Maximum Path Sum - used DFS traversal to find the maximum sum and explained the logic clearly.
    • Asteroid Collision - used a stack to simulate the collision process, which worked perfectly.
  2. 2

    Technical Core Concepts60 min

    This round was conducted by a senior engineer, and it started with a series of Operating System questions. We discussed topics like defragmentation, thrashing, and virtual memory. Then we moved to C++-specific concepts like the auto storage class and virtual functions. OS Concepts

    • Explained virtual memory and thrashing with examples, showing my understanding of memory management in operating systems. C++ Concepts

    • Discussed virtual functions and auto storage classes. I provided examples of dynamic polymorphism using virtual functions and explained static vs. dynamic binding.

  3. 3

    Hiring Manager Round60 min

    Began with the Hiring Manager asking about my previous rounds, followed by a deep dive into my resume. I was asked to explain the projects I worked on, particularly how I optimized code for runtime improvements. Project Discussion- I talked about my previous work where I optimized runtime performance through code changes. For behavioral, use the STAR method to clearly structure your responses.

What came up

HardHybrid0 1 years

A candidate-reported account, lightly edited. Interview processes change by team and date.

Sources