Selenium Testing Framework Quality Control & Assurance 2 — Questions and Answers
Question 1: In Selenium test automation, what is the primary purpose of implementing a Page Object Model (POM)?
- To speed up test execution by parallelizing tests
- To separate test logic from UI element locators, improving maintainability (Correct answer)
- To generate automatic test reports
- To handle browser-specific compatibility issues
Correct answer: To separate test logic from UI element locators, improving maintainability
POM separates test logic from UI locators so that when the UI changes, only the page object needs updating, not every test.
Question 2: Which Selenium quality practice ensures tests remain reliable when dynamic elements have changing IDs?
- Using absolute XPath expressions
- Relying on CSS class names that include counters
- Using relative XPath or stable attributes like data-testid (Correct answer)
- Hardcoding element indices in locators
Correct answer: Using relative XPath or stable attributes like data-testid
Stable attributes like data-testid or relative XPath avoid fragile locators that break when dynamic IDs change.
Question 3: What does a 'flaky test' mean in the context of Selenium QA?
- A test that always fails due to a bug
- A test that passes and fails intermittently without code changes (Correct answer)
- A test that runs only on certain browsers
- A test skipped by the test runner
Correct answer: A test that passes and fails intermittently without code changes
Flaky tests produce inconsistent results due to timing issues, network latency, or race conditions, not actual code defects.
Question 4: In quality assurance for Selenium suites, what is 'test isolation'?
- Running tests on an isolated network without internet
- Ensuring each test is independent and does not rely on the state left by another test (Correct answer)
- Separating unit tests from integration tests in different repositories
- Using incognito mode for every browser session
Correct answer: Ensuring each test is independent and does not rely on the state left by another test
Test isolation means each test sets up its own preconditions and cleans up afterward so failures don't cascade.
Question 5: Which assertion style is recommended for better failure messages in Selenium Java projects?
- Java's built-in assert keyword
- System.out.println comparisons
- TestNG or JUnit assertions like assertEquals with descriptive messages (Correct answer)
- Catching exceptions and printing stack traces
Correct answer: TestNG or JUnit assertions like assertEquals with descriptive messages
TestNG/JUnit assertions provide meaningful failure output including expected vs. actual values, making debugging faster.
Question 6: What QA metric measures the percentage of application features covered by automated Selenium tests?
- Code coverage
- Test pass rate
- Test coverage (functional coverage) (Correct answer)
- Defect density
Correct answer: Test coverage (functional coverage)
Functional (test) coverage tracks how many features or requirements have corresponding automated test cases.
Question 7: Why should Selenium tests avoid using Thread.sleep() for synchronization?
- It causes browser crashes
- It makes tests non-deterministic and wastes time when elements load faster than the sleep duration (Correct answer)
- It is not supported in Selenium 4
- It prevents parallel test execution from running
Correct answer: It makes tests non-deterministic and wastes time when elements load faster than the sleep duration
Thread.sleep() either waits too long wasting time or not long enough causing failures; explicit waits adapt to actual load times.
Selenium Testing Framework Quality Control & Assurance 2
In Selenium test automation, what is the primary purpose of implementing a Page Object Model (POM)?