Careeroza

Scenario Questions

A test passes locally but fails on Jenkins. How do you debug it?

  1. Read the report: error message, screenshot, URL and page source at failure.
  2. Run locally with the same settings: -Dheadless=true, same browser version, same window size (headless default is 800×600).
  3. Check environment differences: URL, test data, time zone, slower agent (timing / waits), proxy or VPN.
  4. Check parallel issues: shared static driver or shared test data.
  5. Add logs around the step and rerun the job; fix the root cause instead of adding sleeps.

Your regression suite takes 4 hours. How do you reduce it?

  • Run in parallel (TestNG threads + Grid / Docker / cloud): often 5–10× faster.
  • Create test data and log in through the API instead of the UI.
  • Move pure logic checks (calculations, validations) to API or unit tests.
  • Remove Thread.sleep and long implicit waits; use explicit waits.
  • Split suites: smoke per build, full regression nightly; tag tests by priority.

How do you automate a page with OTP or CAPTCHA?

You do not break them; you ask for a testable setup in QA:

  • CAPTCHA disabled or a fixed test key in QA/UAT (Google reCAPTCHA has test keys).
  • Fixed OTP for test numbers (e.g. 123456) or an API/database hook to read the generated OTP.
  • For email OTP, read it from a test mailbox API with retry and backoff.

Note: Saying "I would use OCR to read the CAPTCHA" is a red flag in interviews: CAPTCHA exists to stop automation.

A button click sometimes does nothing or throws ElementClickInterceptedException. What do you do?

Something covers the button (a spinner, a cookie banner, a sticky header) or it is not ready yet.

wait.until(ExpectedConditions.invisibilityOfElementLocated(By.cssSelector(".loading-spinner")));
WebElement btn = wait.until(ExpectedConditions.elementToBeClickable(By.id("checkout")));
((JavascriptExecutor) driver).executeScript("arguments[0].scrollIntoView({block:'center'});", btn);
btn.click();

Close the banner in setup if it always appears. Use a JavaScript click only if the overlay is a test-environment artefact, and say why in a comment.