Qualcomm's online assessment is usually reported on HackerRank and pairs a few coding problems with multiple-choice questions where you predict the output of C or C++ snippets and answer operating-system and data-structure theory. Embedded and firmware roles lean on pointers, bit manipulation and RTOS basics, and some hardware roles take a digital-electronics assessment instead. This page covers what the Qualcomm online assessment is, its format and timings, how it is scored, the rules to know before you start, how to prepare and a two-week practice plan.
What the Qualcomm online assessment is
Qualcomm publishes no OA specification, and formats differ by role and country, so this page reflects candidate reports and guides checked on November 12, 2026. Reports range widely: one Glassdoor report described two coding questions and five multiple-choice questions in 75 minutes; guides describe 90 minutes for two or three coding problems and 15 to 20 multiple-choice questions; and a 2021 off-campus account from India described 30 questions, 10 short coding tasks on arrays, strings, vectors and maps plus 20 output-prediction questions. A 2025 embedded intern candidate recalled aptitude items and C questions written as pseudocode, and a December 2025 San Diego intern report mentioned C concepts, RTOS and bit manipulation.
For revision, see C programming interview questions and embedded software engineer interview questions.
Format and timings
| Part | What it involves | Time and questions |
|---|---|---|
| Coding | Two or three easy to medium problems on arrays, strings, linked lists and trees; some campus versions have more, shorter tasks | Shared time limit |
| C and C++ output prediction | Pointers, pre- and post-increment, sizeof, structs and virtual function dispatch | Often 15 to 20 questions, as guides report |
| OS and data-structure theory | Processes and threads, scheduling, memory, synchronization and complexity | Same section |
| Embedded topics (some roles) | Bit manipulation, volatile, interrupts and RTOS basics | Same section |
| Digital electronics (some hardware roles) | Logic gates, flip-flops and timing basics | A separate assessment where used |
Total: commonly reported as 75 to 90 minutes; some campus tests run up to two hours.
How it is scored
- Coding problems are auto-graded on hidden test cases.
- Some Qualcomm tests are reported to use negative marking on multiple choice, so read the instructions before guessing.
- Guides say both sections are evaluated, so a strong coding score may not cover a weak multiple-choice score.
- Qualcomm publishes no cut-off.
Rules to know before you start
- Check which languages are allowed; C and C++ are the usual choices for embedded roles.
- Campus versions may time sections separately.
- Experienced candidates sometimes skip the OA and go straight to a recruiter or technical interviews.
- Outside help is not allowed.
How to prepare
- Predict the output of 20 short C snippets a day: pointer arithmetic, operator precedence, increments, static variables and sizeof.
- Practice bit tasks: set, clear and toggle a bit, count set bits, check a power of two and swap byte order.
- Revise operating systems: context switches, mutexes versus semaphores, priority inversion and virtual memory.
- Code easy to medium array, string and linked-list problems in C or C++ without library shortcuts.
- Hardware candidates: revise combinational and sequential logic in case your track uses a digital-electronics test.
A two-week practice plan
- Days 1 and 2: confirm your track (software, embedded or hardware) and try HackerRank's sample test.
- Days 3 to 5: 20 C and C++ output questions a day, checking every wrong answer by compiling it.
- Days 6 and 7: bit manipulation and memory: masks, shifts, alignment, stack versus heap.
- Days 8 and 9: operating systems and RTOS: scheduling, synchronization, interrupts and priority inversion.
- Days 10 and 11: two coding problems a day in C or C++ on arrays, strings and linked lists.
- Day 12: one full mock of two coding problems and 20 multiple-choice questions in 90 minutes.
- Day 13: review mistakes, then rest.
- Day 14: take the test in one sitting.
Related guides: what an online assessment is, the HackerRank assessment guide, Qualcomm coding interview questions.
On the day, and the mistakes to avoid
- Check the invitation for the platform, the sections, the time per section and whether wrong answers cost marks.
- Try the platform's sample test so the editor, run button and question navigation are familiar.
- Use a reliable laptop on a stable connection, with a working webcam if the invitation asks for one, and close other apps and tabs.
- Note whether sections are timed separately; time left in one section may not carry over.
- Answer the multiple-choice items you know quickly, flag the rest and protect time for the coding problems.
- Before submitting code, run your own edge cases and remove debug prints.
Mistakes that cost candidates:
- Spending the whole clock on one coding problem and leaving easy multiple-choice points unanswered.
- Guessing on every multiple-choice item in a test that uses negative marking.
- Revising only LeetCode and skipping the C output, pointer and operating-system questions.
- Submitting a brute-force solution that passes the samples but times out on hidden tests.
- Switching tabs or windows in a monitored test, which can be logged.
What happens after the Qualcomm online assessment
Candidates commonly report two or three technical interviews of 45 to 60 minutes covering coding, C and C++ fundamentals, operating systems and, for firmware roles, embedded design, followed by a manager or HR conversation. Expect detailed questions on your own projects, especially anything with hardware or low-level code. For the next stage, see our technical phone screen guide.
Where CoPilot Interview fits
Online assessments are tests you take on your own: outside help is not allowed, and proctoring settings can flag other apps, tab switches or a second voice. Practice beforehand instead. CoPilot Interview is an AI interview assistant; its free AI mock interview prepares you for the interviews that follow the assessment, with questions built from your résumé and the job description and each spoken answer scored out of ten. The free plan gives 15 minutes a day of live help in sessions of up to 15 minutes, with AI mock interviews included. Read the invitation carefully and follow your employer's rules.
Disclosure: CoPilot Interview is our product, so weigh what we say about it accordingly.
Frequently asked questions
Does Qualcomm use HackerRank?
Most candidate reports say yes for software and embedded roles, though Qualcomm publishes nothing official and formats vary by role.
What is on the Qualcomm OA?
Coding problems plus multiple-choice questions on C and C++ output, operating systems and data structures. Embedded tracks add bit manipulation and RTOS basics.
How long is the Qualcomm online test?
Reports range from about 75 to 90 minutes, and some campus tests run longer.
Is there negative marking on the Qualcomm test?
Some candidates report it. Check the instructions on the first screen before you guess.
Can I use AI tools during the Qualcomm online assessment?
No, unless the instructions explicitly allow it. Assessments are meant to be taken on your own, and proctoring settings can flag other apps, tab switches or pasted code. Use AI tools to practice beforehand, and follow your employer's rules.
Practice this interview before the real one
The AI mock interview builds questions from your resume and the job description, reads them aloud and scores each spoken answer out of 10. Included on the free plan.
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