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Apple Software Testing Interview Questions & Answers

Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.

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01

What are the boundary values for an age field that accepts 18–60?

AppleEasy
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Test 17, 18, 19, 59, 60 and 61.
02

Write test cases for a search box.

AppleMedium
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Valid keyword, partial match, no results, special characters, very long text, empty search, case sensitivity, spelling errors, suggestions and speed of results.
03

What are the levels of testing?

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Unit, integration, system and acceptance testing, moving from individual components to the complete product in front of users.
04

What is a sprint retrospective?

AppleMedium
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A team meeting at the end of a sprint to discuss what went well, what did not and what to improve next.
05

What is a REST API?

AppleMedium
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An API style using HTTP methods on resources identified by URLs, usually exchanging JSON and staying stateless.
06

What is root cause analysis for defects?

AppleMedium
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Finding why a defect was introduced, such as unclear requirements or missed reviews, to prevent similar defects in future.
07

What is the difference between DELETE and TRUNCATE?

AppleMedium
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DELETE removes selected rows and can be rolled back; TRUNCATE quickly removes all rows and resets the table.
08

How do you reduce the number of defects slipping into production?

AppleHard
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Shift left with early reviews, improve test design, automate regression, use better test data, add monitoring and learn from escaped defects.
09

What goes into a test plan?

AppleMedium
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Scope (in and out), objectives, approach, environments, schedule, roles, entry/exit criteria, risks and mitigation, deliverables and tools.
10

How do you test a REST API with authentication?

AppleMedium
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Check access with valid, expired and missing tokens, role-based permissions, error codes and that sensitive data is never exposed.
11

What is usability testing?

AppleMedium
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Evaluating how easy and pleasant a product is to use by observing real users complete tasks and noting confusion.
12

What metrics do QA teams track?

AppleMedium
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Test execution rate, pass percentage, defect density, defect leakage, defect rejection ratio, requirement coverage and automation coverage.
13

Write test cases for an online money transfer.

AppleMedium
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Valid transfer, insufficient balance, daily limit, wrong beneficiary, OTP failure, network drop mid-transaction, duplicate click and statement update.
14

What is a blocker bug?

AppleMedium
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A defect that stops testing or release of a feature because no workaround exists, so it is highest priority.
15

What is regression testing, and when do you automate it?

AppleMedium
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Re-testing existing features after a change. Automate stable, repetitive, high-value flows that run every release.
16

What is decision table testing?

AppleMedium
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List conditions and actions in a table and cover every combination of conditions (rules) — ideal for business rules like loan approval: salary > X AND credit score > Y → approve.
17

Explain SQL joins briefly.

AppleMedium
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INNER returns matching rows, LEFT keeps all left rows, RIGHT keeps all right rows and FULL keeps all rows from both tables.
18

What are common HTTP status codes?

AppleMedium
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200 OK, 201 Created, 204 No Content, 400 Bad Request, 401 Unauthorized, 403 Forbidden, 404 Not Found, 500 Internal Server Error.
19

What is test coverage and how do you measure it?

AppleMedium
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The extent of requirements or code exercised by tests. Measure requirement coverage with a traceability matrix and code coverage with tools.
20

What is a test scenario for the login functionality at a high level?

AppleEasy
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Valid login, invalid login, forgot password, locked account and session handling are the main scenarios to cover.
21

What is the testing pyramid?

AppleMedium
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A model with many fast unit tests at the base, fewer API or integration tests in the middle and a small number of UI tests at the top.
22

How would you test a payment gateway?

AppleHard
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Success, failure and pending flows, timeouts, refunds, double-click payments, every method (UPI, cards, net banking), rounding, security (no card data stored) and reconciliation with bank reports.
23

Smoke vs sanity testing?

AppleEasy
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Smoke testing checks that the critical features of a new build work (broad and shallow). Sanity testing checks that a specific fix or area works after a change (narrow and deep).
24

What is defect density?

AppleMedium
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The number of defects per size of software, for example defects per thousand lines of code or per module, used to compare quality.
25

What is pairwise testing?

AppleMedium
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A technique that tests all pairs of input values instead of every combination, greatly reducing test cases while catching most defects.
26

Production has a critical bug. What are your steps?

AppleHard
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Reproduce and assess impact, inform stakeholders, help developers fix and verify in staging, run regression and check monitoring after the hotfix, then do a post-mortem.
27

What is the difference between a test suite and a test run?

AppleMedium
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A suite is a collection of related test cases; a run is one execution of a set of tests against a build.
28

Write SQL to verify an order was saved correctly.

AppleMedium
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SELECT status, amount FROM orders WHERE order_id = 'ORD123'; -- compare with the UI, then check the matching rows in order_items
29

What is SQL and why do testers use it?

AppleEasy
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A language to query databases. Testers use it to verify data saved by the application, prepare test data and check backend results.
30

What are entry and exit criteria?

AppleMedium
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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).
31

What is error guessing?

AppleMedium
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Using experience to guess where defects likely hide, such as empty fields, special characters or unexpected sequences, and designing tests for them.
32

Write test cases for a lift (elevator).

AppleEasy
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Moves to the chosen floor, doors open and close, door sensor stops closing on obstruction, overload alarm, emergency button, behaviour in a power cut, max capacity and the floor display.
33

How do you test an API using Postman?

AppleMedium
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Create a request with method, URL, headers and body, send it, check status and body, add test scripts and save it in a collection.
34

What is the difference between static and dynamic testing?

AppleMedium
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Static testing reviews documents and code without executing; dynamic testing executes the software to observe behaviour.
35

What is SDLC and STLC?

AppleEasy
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SDLC is the full software development life cycle; STLC is the testing life cycle: requirement analysis, test planning, test design, environment setup, execution and closure.
36

What is defect leakage?

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Defects found after release that testing should have caught; leakage % = defects in production / total defects x 100.
37

What is a test plan and what does it contain?

AppleEasy
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A document defining scope, approach, resources, schedule, entry and exit criteria, risks and deliverables of testing.
38

What makes a good bug report?

AppleEasy
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A clear title, steps to reproduce, expected vs actual result, environment/build, severity and priority, and evidence (screenshot, video, logs).
39

What is a test closure report?

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A final document summarising what was tested, defects found and open, metrics, lessons learned and the recommendation for release.
40

What is a bug triage meeting?

AppleMedium
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A regular review where QA, development and product assess new bugs and decide severity, priority, owner and target release.
41

How do you test a REST API that is not ready yet?

AppleHard
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Use mocks or stubs from the API contract such as Swagger, write test cases early and validate again when the real service is available.
42

How do you decide the priority of test cases?

AppleMedium
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By business criticality, usage frequency, defect history, risk and dependencies, running high-priority cases first.
43

What is the difference between an error, a defect and a failure?

AppleEasy
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A human error causes a defect in the code, and when that defect is executed it produces a failure visible to users.
44

What is the difference between GET and POST?

AppleMedium
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GET retrieves data and has parameters in the URL; POST sends data in the body to create or process something.
45

What is mobile app testing and what extra checks does it need?

AppleMedium
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Test on real devices and OS versions, interrupts such as calls, battery, network changes, gestures, permissions and app store guidelines.
46

How would you test a login page for security?

AppleHard
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Check SQL injection, brute-force lockout, password masking, session timeout, HTTPS, cookie flags, error messages not revealing users and password reset flow.
47

What is UAT?

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User Acceptance Testing — end users or the client verify that the system meets business needs in a production-like environment before go-live.
48

How do you test an application when requirements change frequently?

AppleMedium
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Keep tests modular, prioritise by risk, use exploratory testing, automate stable parts and keep close contact with product owners.
49

What is a test environment?

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The hardware, software, data and configuration where testing happens, set up to mirror production as closely as practical.
50

What are the seven principles of testing?

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Testing shows presence of defects, exhaustive testing is impossible, test early, defects cluster, the pesticide paradox, testing is context-dependent and absence-of-errors is a fallacy.
51

Write test cases for an ATM withdrawal.

AppleMedium
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Valid card and PIN, wrong PIN, three failed attempts, amount above balance, amount above daily limit, invalid denomination, machine out of cash, network failure and receipt printing.
52

What is a hotfix?

AppleMedium
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An urgent patch released outside the normal schedule to fix a critical production defect, followed by regression testing and merge back to the main branch.
53

What are the typical JIRA workflows for bugs?

AppleMedium
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Statuses like To Do, In Progress, In Review, Ready for QA, Done and Reopened, with transitions that depend on the team's configuration.
54

What is the difference between a test case and a test scenario?

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A scenario is a high-level thing to test (user logs in); test cases are the detailed steps and data that verify it.
55

A bug is not reproducible. What next?

AppleMedium
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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.
56

Write test cases for a file upload feature.

AppleMedium
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Allowed and disallowed formats, size limits, empty file, duplicate names, special-character names, cancel upload, slow network and multiple files.
57

What do you check when testing an API in Postman?

AppleMedium
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Status code, response body and schema, headers, response time, error messages for invalid input, authentication (401/403) and that data is saved in the database.
58

The developer says "it's not a bug". What do you do?

AppleMedium
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Re-check the requirement, reproduce with clear steps and evidence (screenshots, logs), discuss with the BA/PO and record the final decision.
59

What is compatibility testing?

AppleMedium
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Checking the application works across browsers, devices, operating systems, screen sizes and network conditions.