01
Write SQL to verify an order was saved correctly.
Show answer
SELECT status, amount FROM orders WHERE order_id = 'ORD123';
-- compare with the UI, then check the matching rows in order_items
Qualcomm Software Testing Interview Questions & Answers
Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.
About Qualcomm hiring for Software Testing roles
Qualcomm designs semiconductors and wireless technologies, including Snapdragon processors, modems and connectivity chips for smartphones, PCs, automotive and IoT. Its India centres in Hyderabad and Bengaluru are major engineering sites for software, hardware and testing. It hires for embedded software engineers, test engineers, hardware engineers and data roles.
For Software Testing roles, this Qualcomm practice set focuses most on Agile, SQL and API Testing (6), Database Testing (6), Bug Life Cycle and Jira (5), Automation Basics for Manual Testers (5). It has 5 easy, 32 medium, 3 hard questions, so you can start easy and work up to the harder ones.
- Company type
- Hardware & semiconductors
- Headquarters
- San Diego, California, USA
- Main India offices
- Hyderabad, Bengaluru, Chennai
Qualcomm Software Testing interview process
- Online assessment (aptitude + technical + coding)
- Technical round 1
- Technical round 2
- Managerial round
- HR round
Typical pattern based on public candidate experiences. Rounds vary by role, team and year.
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02
A developer asks you to test a feature that has no acceptance criteria. How do you proceed?
Show answer
First ask the product owner or business analyst for the expected behaviour and write down the answers as draft acceptance criteria. Meanwhile, explore the feature, compare it with similar existing features and list assumptions. Share the assumptions in the story so everyone agrees before you sign off. Raise the missing criteria in the next refinement so future stories are not picked up without them.
03
What is recovery testing?
Show answer
Recovery testing checks how well the system recovers from crashes, hardware failures, network loss or other failures. For example, kill the server during a file upload, or disconnect the network during payment, and verify the system restores a consistent state, does not lose or duplicate data and resumes or shows a clear message. It also measures recovery time against agreed targets, which matters for banking and healthcare systems.
04
SQL: find rows where mandatory columns are NULL or empty in a customers table.
Show answer
-- Mandatory fields: name, email, phone
SELECT id, name, email, phone
FROM customers
WHERE name IS NULL OR TRIM(name) = ''
OR email IS NULL OR TRIM(email) = ''
OR phone IS NULL OR TRIM(phone) = '';
-- Expected result: no rows
05
What is defect removal efficiency?
Show answer
Defect removal efficiency shows how many defects the team found before release. DRE = defects found before release divided by (defects found before release plus defects found after release), multiplied by 100. If QA found 90 bugs and users reported 10, DRE is 90 percent. A falling DRE means testing is missing more defects, and the escaped bugs should be analysed to improve test coverage.
06
What is the Page Object Model?
Show answer
The Page Object Model is a design pattern where each page or major component gets a class that holds its locators and actions, such as LoginPage with a login method. Tests call these methods instead of using locators directly. When the login button changes, you update one place instead of fifty tests. Tests become readable, like steps a manual tester would write, and duplication drops. Keep assertions mostly in tests, not page objects.
07
What is performance testing and its types?
Show answer
Measuring speed and stability: load (expected users), stress (beyond limits), spike (sudden surge), endurance (long duration) and scalability testing.
08
SQL: verify that row counts and totals match between a source table and a target table after a data load.
Show answer
-- Compare counts and sums side by side; both columns must match
SELECT
(SELECT COUNT(*) FROM staging_orders) AS src_count,
(SELECT COUNT(*) FROM dw_orders) AS tgt_count,
(SELECT SUM(amount) FROM staging_orders) AS src_amount,
(SELECT SUM(amount) FROM dw_orders) AS tgt_amount;
09
What is Agile testing?
Show answer
Testing that is continuous and collaborative within each sprint, with testers working alongside developers and product owners from the start.
10
Tell me about a time you found an important bug that others missed.
Show answer
Model answer: Situation: before a release of an insurance app, all regression tests had passed. Task: I was doing a final exploratory round. Action: I renewed a policy on the last day of the month and saw that the premium was calculated for 31 days in a 30-day month. I logged it with exact data and the formula difference. Result: the date logic was fixed before release, and I added month-end cases to the suite.
11
Write test cases for a calculator app.
Show answer
Basic operations, division by zero, decimals, large numbers, order of operations, clear and backspace, repeated operations and memory keys.
12
How do you test push notifications?
Show answer
Verify notifications arrive when the app is in foreground, background and closed. Check title, text, icon and that tapping opens the right screen with the correct data. Test with notifications disabled at OS level and inside app settings. Check behaviour after logout, reinstall and on multiple devices with the same account. Test grouping of many notifications, time-sensitive ones, and that no notification shows private data on the lock screen.
13
What is API testing and why is it important?
Show answer
Testing services directly without the UI, checking status codes, responses, security and performance. It finds issues early and is faster than UI tests.
14
How do you manage testing for multiple projects with competing deadlines?
Show answer
Model answer: Situation: I was supporting two products whose releases fell in the same week. Task: deliver both without dropping quality. Action: I listed tasks by release date and risk, agreed priorities with both leads, blocked focus time for each product and shared daily status. I also asked a teammate to take retesting on one project. Result: both releases went out on time with no critical escapes.
15
The same bug keeps reopening across three sprints. What do you do?
Show answer
Stop the retest loop and call a short session with the developer, lead and product owner. Check whether the fix addresses the root cause or only the symptom, whether everyone agrees on the expected behaviour and whether different environments or data are involved. Run a root cause analysis and agree on clear acceptance tests before the next fix. Add an automated regression check so it cannot silently return.
16
Describe a time an automated test caught a regression that manual testing would have missed.
Show answer
Situation: a small tax rounding change was made late on a Friday. Task: no manual regression was planned for pricing. Action: our nightly API suite failed one data-driven case where a 3-item cart was off by one rupee; I checked the trace, reproduced it manually and logged it with the failing input. Result: it was fixed before release, and the team agreed to keep pricing tests in the pull request suite.
17
Tell me about a time you pushed for an accessibility fix the team wanted to postpone.
Show answer
Situation: before a release, I found the payment form errors were not announced by screen readers and not reachable by keyboard. Task: the team wanted to defer it. Action: I recorded a short NVDA video showing a user could not finish payment, linked it to WCAG and our customer commitments, and proposed a small fix. Result: the fix took half a day, shipped in the release and we added keyboard checks to our definition of done.
18
SQL: verify that soft-deleted users do not appear in the active users list.
Show answer
-- the active list query used by the app should return 0 rows here
SELECT u.user_id, u.email
FROM users u
WHERE u.is_deleted = 1
AND u.user_id IN (
SELECT user_id FROM active_users_view
);
19
A bug is not reproducible. What next?
Show answer
Re-check environment, data, browser and steps; check the logs; try the reporter's setup; add video and console logs; mark it 'cannot reproduce' only after discussing with the developer, and keep monitoring.
20
What is CSRF and how is it prevented?
Show answer
Cross-site request forgery tricks a logged-in user's browser into sending an unwanted request to a site, such as changing their email, because the browser automatically includes cookies. Prevention includes anti-CSRF tokens in forms, SameSite cookie settings and re-authentication for sensitive actions. Testers check that state-changing requests fail when the token is missing or reused, and that such actions are not done through GET requests.
21
What is data-driven testing?
Show answer
Data-driven testing runs the same test steps many times with different input and expected values taken from a table, CSV, JSON or spreadsheet. For example, one login test can run with valid users, locked users, wrong passwords and blank fields. It reuses the logic, makes adding cases easy and maps well to equivalence partitioning and boundary values from manual design. Tools support it through parameterised tests, such as pytest.mark.parametrize.
22
SQL: how do you test a foreign key defined with ON DELETE CASCADE?
Show answer
-- Create a parent and child, delete the parent, child rows must disappear
INSERT INTO customers (id, name) VALUES (501, 'Cascade Test');
INSERT INTO orders (id, customer_id, total) VALUES (7001, 501, 250);
DELETE FROM customers WHERE id = 501;
SELECT COUNT(*) FROM orders WHERE customer_id = 501;
-- Expected: 0
-- Also test inserting an order for a non-existent customer: it must fail
23
What is defect density?
Show answer
The number of defects per size of software, for example defects per thousand lines of code or per module, used to compare quality.
24
What is data masking and why is it used in test databases?
Show answer
Data masking replaces real sensitive values with realistic but fake ones, for example changing real phone numbers to valid-looking dummy numbers and real names to generated names. It lets teams test with production-like data volume and patterns without exposing customer information. It also supports compliance with India's Digital Personal Data Protection Act. Testers should check that masked data still passes validation rules and keeps relationships between tables intact.
25
The developer says "it's not a bug". What do you do?
Show answer
Re-check the requirement, reproduce with clear steps and evidence (screenshots, logs), discuss with the BA/PO and record the final decision.
26
What are response time, throughput and latency?
Show answer
Response time is the total time from sending a request to receiving the complete response, as the user experiences it. Latency is the delay before the first byte of the response arrives, mostly network and waiting time. Throughput is how many requests or transactions the system handles per unit of time, such as 500 requests per second. Good performance usually means low response time at the required throughput.
27
Write test cases for a coupon code field at checkout.
Show answer
Apply a valid coupon and check the discount and final amount. Test invalid, expired and not-yet-active coupons. Check minimum order value, maximum discount cap and category restrictions. Verify one-time-use coupons cannot be reused and that only one coupon applies if stacking is not allowed. Check case sensitivity and leading or trailing spaces. Remove the coupon and confirm the total resets. Change cart items after applying and verify the discount is recalculated.
28
What are entry and exit criteria?
Show answer
Entry criteria are conditions that must be met to start testing (build ready, environment set); exit criteria define when testing can stop (pass rate, no critical defects).
29
What are ACID properties and how can a tester check them?
Show answer
ACID means Atomicity, Consistency, Isolation and Durability. Atomicity: a transfer that debits one account must also credit the other, or neither happens; test by forcing a failure midway. Consistency: constraints still hold after the transaction. Isolation: two users updating together do not see each other's half-done work; test with two sessions. Durability: committed data survives a restart; test by committing, restarting the service and querying again.
30
How do you make test cases reusable and easy to maintain?
Show answer
Write one clear objective per case, keep steps short and avoid hard-coding data that changes. Put shared steps such as login into a common precondition instead of repeating them. Use consistent naming, link each case to a requirement and group them by module. Keep expected results specific but not tied to exact pixel layouts. Review and update cases whenever a story changes, so the suite stays trustworthy for regression.
31
What is Appium at a high level?
Show answer
Appium is an open-source tool for automating native, hybrid and mobile web apps on Android and iOS using the WebDriver protocol. Tests can be written in Java, Python, JavaScript and other languages, and it uses platform drivers such as UiAutomator2 for Android and XCUITest for iOS. It can run on emulators, simulators, real devices and cloud device farms. Stable accessibility IDs make the best locators for it.
32
What is a flaky test and what usually causes it?
Show answer
A flaky test passes and fails on the same code without any change. Common causes are timing problems such as fixed sleeps or missing waits, tests depending on each other or on shared data, unstable locators, animations, third-party services, test order in parallel runs and environment issues like slow servers. Flaky tests destroy trust in the suite, so teams quarantine them, find the root cause and fix it rather than adding retries forever.
33
SQL: find duplicate emails.
Show answer
SELECT email, COUNT(*)
FROM users
GROUP BY email
HAVING COUNT(*) > 1;
34
A CAPTCHA on the signup page blocks screen reader users. What do you recommend?
Show answer
Log it as a high-severity accessibility bug because it fully blocks a group of users from signing up. An image-only CAPTCHA fails WCAG unless an alternative is offered. Recommend options such as invisible or risk-based bot checks, an email or OTP verification step, an audio alternative plus another modality, and rate limiting on the server. Retest the full signup with NVDA and TalkBack after the change.
35
What do you check in mobile accessibility testing?
Show answer
Turn on the screen reader, TalkBack on Android or VoiceOver on iOS, and check every button, image and field has a meaningful label and the reading order is logical. Check text scales with system font size, colour contrast is sufficient and touch targets are large enough, about 48 by 48 density-independent pixels. Make sure information is not shown by colour alone and that the app works without complex gestures.
36
What is compatibility testing?
Show answer
Checking the application works across browsers, devices, operating systems, screen sizes and network conditions.
37
How do you capture screenshots, videos and traces when an automated test fails?
Show answer
Most frameworks support this through configuration. In Playwright, set screenshot to only-on-failure, video to retain-on-failure and trace to on-first-retry in the config, then open the trace viewer to step through actions, network calls and the page state. In Selenium, call save_screenshot in a teardown hook when a test fails. Store these artefacts in CI so anyone can debug the failure without rerunning it.
38
What is database testing and what does it cover?
Show answer
Database testing checks that the data an application stores and reads is correct, complete and safe. It covers schema checks (tables, columns, data types), constraints and keys, data integrity after create, update and delete actions, stored procedures, triggers and views, transactions, and basic performance of heavy queries. For example, after placing an order in the UI, a tester queries the orders and order_items tables to confirm every value was saved exactly as entered.
39
What is the use of SQL GROUP BY and HAVING in test validation?
Show answer
They let testers verify totals and counts per category, such as the number of orders per customer, and compare them with the UI or reports.
40
The app crashes only on one older Android version. What are your steps?
Show answer
Reproduce it on that exact OS version, using a real device or an emulator image, and note the device model and app build. Capture the crash log and stack trace. Check if the code uses an API or library not supported on that version, or a permission or storage behaviour that changed. Log the bug with logs and the minimum supported version from the requirement, so the team can decide to fix it or raise the minimum version.
Tips to crack the Qualcomm Software Testing interview
- Revise C programming, pointers, operating systems and computer architecture for embedded software roles.
- Learn basics of wireless communication like 4G and 5G, and what a system-on-chip does.
- Read about Snapdragon platforms and Qualcomm's work in automotive and AI PCs.
- Keep a one-minute story ready for every project on your CV: problem, your part, tools, result.
- Practise the hard questions on this page aloud; Qualcomm interviewers usually ask follow-ups on your first answer.
Frequently asked questions
How many rounds are there in the Qualcomm Software Testing interview?
Candidates usually go through 5 stages: Online assessment (aptitude + technical + coding); Technical round 1; Technical round 2; Managerial round; HR round. The exact rounds change with the role, team, location and your experience, so confirm the process with the recruiter.
Which topics should I prepare for the Qualcomm Software Testing interview?
This practice set leans on Agile, SQL and API Testing (6), Database Testing (6), Bug Life Cycle and Jira (5), Automation Basics for Manual Testers (5). Revise those first, then practise explaining one or two of your own projects end to end, because most Qualcomm interviewers ask you to walk through real work.
Are these the exact questions asked at Qualcomm?
No. These are curated practice questions that match the skills and difficulty usually tested in hardware & semiconductors interviews like Qualcomm's. They are not a leaked or verified list of past questions.
Where does Qualcomm hire Software Testing professionals in India?
Qualcomm has large teams in Hyderabad, Bengaluru, Chennai. Openings and locations change often, so check the Qualcomm careers page and filter by city and experience.
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