Cheat sheets

Selenium WebDriver

Waits, locators, stale elements, and framework answers interviewers keep asking.

Playwright

Auto-waiting, locators, fixtures, network control, and debugging.

Cypress

Command queue, retries, intercepts, and the limits interviewers probe.

API testing

Status codes, what to assert, auth, and the cases beyond the happy path.

SQL for testers

Joins, grouping, duplicates, and the queries you write to verify data.

Java for SDETs

The Java you are asked to write and explain in automation interviews.

Test design techniques

The named techniques interviewers expect, each with a one-line example.

Git, Docker and CI

The commands and ideas that come up when you say you run tests in CI.

Mobile testing and Appium

Appium basics, mobile-specific risks, and what to say about devices.

Performance testing and JMeter

Load test types, the metrics to quote, and a JMeter refresher.

Postman and Newman

Collections, variables, scripts and running them in CI.

BDD and Agile for testers

Gherkin, the three amigos, and what QA does in Scrum.