400 Automation Testing Interview Questions with Answers 2026

Tool Engineering: Selenium, Playwright, Cypress, and Locators.

Programming & OOP: Java/Python/JS for Test Design and Reusability.

DevOps & CI/CD: Jenkins, GitHub Actions, Docker, and Git Workflows.

Advanced Strategy: API Testing, Performance, and Security Scenarios.

B) Automatically rerunning failed tests up to three times before reporting a failure.

C) Implementing explicit waits and identifying the root cause of non-determinism.

D) Moving all flaky tests to a separate "quarantine" suite that does not block the build.

E) Using Thread.sleep() to provide a consistent buffer for network latency.

F) Disabling the tests entirely until the next major release cycle.

Correct Answer: C

Overall Explanation: Flakiness is usually caused by race conditions or environment instability; solving it requires precise synchronization and root-cause analysis rather than masking the symptoms.

Detailed Option Explanations:

B: Incorrect. Retries mask instability and lead to "false greens" that eventually erode trust in the suite.

C: Correct. Explicit waits target specific conditions, and root-cause analysis ensures long-term stability.

D: Incorrect. While quarantining prevents build blocks, it doesn't solve the flakiness; it's a temporary management tactic, not a strategy for effectiveness.

E: Incorrect. Hard-coded sleeps are inefficient and do not adapt to varying environment speeds.

F: Incorrect. Disabling tests reduces test coverage and increases the risk of regressions.

In the context of the Page Object Model (POM), where should the assertions ideally be located to ensure maximum maintainability?

B) Inside the Base Page class to be shared across all pages.

C) Inside the Test Script (Test Class) rather than the Page Class.

D) Inside a separate utility class dedicated solely to validation.

E) Within the Constructor of the Page Class to verify page load.

F) Inside the Configuration file as global validation rules.

Correct Answer: C

Overall Explanation: POM is a design pattern intended to separate the representation of the UI (Page Classes) from the validation logic (Test Classes).

Detailed Option Explanations:

B: Incorrect. Base Page should only contain common actions/locators, not specific assertions.

C: Correct. Test scripts should control the "assertion" logic, while Page Classes provide the "services" of the page.

D: Incorrect. While helper methods are okay, the logic of the test flow belongs in the Test Class.

E: Incorrect. Asserting in a constructor can lead to brittle code and difficulty in instantiation.

F: Incorrect. Global rules cannot account for the specific behavioral checks of individual test cases.

Which principle of Object-Oriented Programming is most directly applied when creating a 'BasePage' class to hold common WebDriver methods like click() or sendKeys()?

B) Polymorphism

C) Inheritance

D) Abstraction

E) Composition

F) Interface Segregation

Correct Answer: C

Overall Explanation: Creating a parent class (BasePage) to share common functionality with child classes (Specific Pages) is a classic use of inheritance.

Detailed Option Explanations:

B: Incorrect. Polymorphism refers to performing a single action in different ways.

C: Correct. Inheritance allows child Page Classes to reuse methods defined in the BasePage.

D: Incorrect. Abstraction hides complex implementation details, but the act of extending the class is inheritance.

E: Incorrect. Composition involves "has-a" relationships; inheritance is "is-a."

F: Incorrect. This is a SOLID principle regarding interface design, not the primary mechanism of a BasePage hierarchy.

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