Qualcomm

1. 1

   Online test

   Online assessment, MCQ only, 3 sections
   HirePro90 min60 questions-0.25 for a wrong answer

   Section	Qs	Min	Topics
   Aptitude	20	30	percentages, ratios, probability, ages, seating arrangement, data tables, patterns, logical reasoning
   Programming basics	20	30	C/C++ output prediction, pointers, selection sort steps, OS scheduling, computer architecture
   Core CS (Digital or CS by choice)	20	30	pointers and volatile, bit manipulation, number-system conversion, OS, computer networks, computer architecture, DSA

   aptitude · C/C++ · OS · computer architecture · computer networks

   Sections timed 30 minutes each and taken in order. Attempts reported around 46 of 60. Aptitude time pressure about 90 seconds per question.

2. 2

   Technical interview

   Technical interview (single round)
   Microsoft Teams45 min

   projects · recursion and stack frames · caching · language choice · compilers · encryption basics · memory leaks · smart pointers · static and global variables · preprocessor · endianness · five-stage pipeline · data hazards · REST APIs · scalability · rate limiting · database indexing · write-ahead logging · OCR/ML project reasoning

   Duration 37 to 50 min across accounts (45 slot). Interviewers friendly and gave hints; no separate HR round. Some interviews had live coding in an online editor, others verbal or notepad only. Interviewer background (security, compiler) steered topics.

Advice from candidates

137 pieces of advice, in their own words. Names removed.

• Some questions are interrelated( like seating arrangements , if you decoded one you can answer others based on that also )so try to use your time wisely .

  online_test · 2025-26

• Dont panic if you dont know answers , interviewers are very cooperative .

  interview · 2025-26

• Be honest , and you should have knowledge of all of your projects written in your resume like how it works and most importantly why you followed that approach because interviewers try to raise cross questions form that part.

  interview · 2025-26

• When given coding question discuss with the interviewers the approach parallel while writing code giving explanation of what you are writing

  interview · 2025-26

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Question patterns reported

The kind of problem, not the problem itself. Our practice questions are written to match these patterns.

• Onlinelinked reasoning set where one seating arrangement answers several questions
• Technicalprint matrix in spiral order
• Technicalreverse a singly linked list
• Technicalswap two numbers without temporary
• Technicalhigh-level LRU cache design
• Technicalbit manipulation of medium difficulty
• Technicaltwo logical puzzles
• Onlinefinal-value tracing of short C snippets with pointers
• Onlinelogic gate count for a Boolean expression
• Onlinepre/post-increment expression evaluation
• Onlinestring literal mutability and terminator
• Onlinestate of array after k selection sort steps
• Onlinetable-based percentage questions
• Technicalfactorial iterative vs recursive, optimise with lookup table
• Technicalmutually recursive definition leading to stack overflow
• Technicalunique and shared pointer copy and reference count tracing
• Technicalsum of node values per tree level using BFS
• Technicaldelete kth node from end of singly linked list
• Technicalqueue built from two stacks, explained verbally
• Technicalper-user sliding window rate limiter with a queue
• Technicalfind duplicates in sorted then unsorted array
• Onlinepointer and double-pointer output tracing
• Onlineseating arrangement driving several questions
• Onlinematch technology to its main advantage