100 Cypress Interview Questions: Tests, Debugging, Integration

Cypress is a popular end-to-end testing framework for modern web applications. Its powerful, easy-to-use tools allow developers and QA engineers to write reliable, automated tests that ensure the stability of websites and web applications. Whether you’re a beginner or an experienced Cypress user, preparing for a Cypress interview can be challenging due to the vast scope of topics covered.

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100 Cypress Interview Questions: Tests, Debugging, Integration

This article compiles 100 essential Cypress interview questions, ranging from basic concepts to advanced techniques, covering topics such as installation, writing tests, debugging, and integrating with other tools. These questions will help you excel in your next Cypress interview.

Basic Cypress Questions

1. What is Cypress?
2. How is Cypress different from Selenium?
3. Can you explain the architecture of Cypress?
4. What are the main features of Cypress?
5. How do you install Cypress?
6. What are the default folders created when you install Cypress?
7. What file types does Cypress support for writing tests?
8. What browsers does Cypress support?
9. How do you run Cypress tests on different browsers?
10. How do you open the Cypress Test Runner?
11. How do you run tests in Cypress from the command line?
12. What is the difference between cy.visit() and cy.request()?
13. How do you assert elements in Cypress?
14. How do you locate elements in Cypress using selectors?
15. What are Cypress commands, and how are they queued?
16. How does Cypress handle asynchronous code?
17. How do you set up a test suite in Cypress?
18. How do you write a test case in Cypress?
19. Can Cypress handle APIs?
20. How do you test API endpoints using Cypress?

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Intermediate Cypress Questions

21. How does Cypress handle timeouts, and how can you customize them?
22. What are Cypress aliases, and how do you use them?
23. What is the difference between cy.get() and cy.find()?
24. How do you handle uncaught exceptions in Cypress tests?
25. How do you test a single-page application (SPA) using Cypress?
26. How do you make Cypress tests reusable?
27. What is Cypress’s beforeEach and afterEach used for?
28. Can you explain Cypress fixtures and how they are used?
29. How do you use Cypress custom commands?
30. How do you handle cross-domain issues in Cypress?
31. How do you simulate a network request failure in Cypress?
32. How do you stub a network request using cy.intercept()?
33. How do you write tests for forms in Cypress?
34. How do you test file uploads in Cypress?
35. What is Cypress’s viewport, and how do you change it?
36. How do you test responsiveness in Cypress?
37. What is the purpose of cy.wrap() in Cypress?
38. How do you access variables between tests in Cypress?
39. How does Cypress handle browser automation?
40. How do you mock browser alerts or confirm dialogs?

Advanced Cypress Questions

41. How do you run Cypress tests in parallel?
42. How do you integrate Cypress with CI/CD pipelines (e.g., Jenkins, GitLab, etc.)?
43. How do you set up test data for Cypress tests?
44. How do you use cy.task() to execute Node.js code?
45. What are Cypress plugins, and how are they used?
46. How do you write end-to-end tests with Cypress?
47. Can Cypress be used for testing mobile applications?
48. How do you debug failing Cypress tests?
49. How do you use Cypress with Docker?
50. What are Cypress’s .then() and .should() used for?
51. How do you integrate Cypress with a testing framework like Mocha or Chai?
52. How do you handle file downloads in Cypress?
53. How does Cypress handle cookies and sessions?
54. How do you test WebSocket-based applications using Cypress?
55. What is Cypress Dashboard, and how is it used?
56. How do you handle browser events (like hover, scroll, etc.) in Cypress?
57. How do you set environment variables in Cypress?
58. How do you write tests for third-party widgets?
59. How do you manage authentication in Cypress tests?
60. Can Cypress handle shadow DOM?

Best Practices & Optimizations

61. What are some best practices for writing maintainable Cypress tests?
62. How do you avoid flaky tests in Cypress?
63. How do you handle test retries in Cypress?
64. What is the difference between UI-driven and API-driven tests in Cypress?
65. How do you structure a large test suite in Cypress?
66. How do you optimize Cypress tests for performance?
67. How do you handle dynamic elements in Cypress?
68. How do you create custom assertions in Cypress?
69. How do you test accessibility (a11y) using Cypress?
70. What are Cypress commands like cy.wait(), and how do you avoid overusing them?
71. How do you ensure tests are independent and do not rely on previous test outcomes?
72. How do you automate visual regression testing in Cypress?
73. How do you handle flaky network requests in Cypress?
74. What is Cypress’s retry-ability feature, and how does it work?

Cypress Integrations

75. How do you integrate Cypress with a database?
76. How do you integrate Cypress with REST APIs?
77. How do you integrate Cypress with GraphQL APIs?
78. Can Cypress be integrated with BrowserStack or Sauce Labs?
79. How do you integrate Cypress with Jenkins for automated test execution?
80. How do you generate reports from Cypress test results?

Debugging & Troubleshooting

81. What debugging techniques can you use in Cypress?
82. How do you use Cypress’s built-in cy.debug() method?
83. How do you use browser dev tools in conjunction with Cypress?
84. How do you handle failures due to slow network conditions?
85. How do you handle browser incompatibility issues in Cypress?
86. What are some common causes of flaky tests, and how do you solve them?
87. How do you debug JavaScript errors in Cypress?
88. How do you increase Cypress’s timeout when waiting for elements to load?
89. How do you handle out-of-memory errors during Cypress test runs?
90. What steps would you take if Cypress tests work locally but fail on CI?

Miscellaneous Cypress Questions

91. How does Cypress handle browser tabs and windows?
92. Can you use Cypress to test desktop applications?
93. What is Cypress cy.clock() and how is it used?
94. What is the difference between cy.spy() and cy.stub()?
95. How do you capture screenshots and videos in Cypress?
96. How do you schedule Cypress tests in a continuous testing environment?
97. What are the limitations of Cypress, and how can you work around them?
98. Can Cypress be used for performance testing?
99. How do you maintain and update tests in a fast-paced development environment?
100. What’s new in the latest version of Cypress?

Mastering Cypress requires both theoretical knowledge and practical experience. These 100 interview questions will help you prepare effectively and showcase your expertise. By understanding key Cypress concepts, you’ll be better equipped to face technical interviews and demonstrate your proficiency in web application testing with Cypress.