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All Ethical hacking Interview Questions

Practice the complete collection of Ethical hacking interview questions including theory, coding, MCQs and real interview problems.

Total Questions: 152Topics: 30Complete interview preparation

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All Ethical hacking Interview Questions (152)

Scroll through every important Ethical hacking question asked in real interviews. Includes MCQs, subjective questions, and coding prompts.

1. Why is a written scope and Rules of Engagement mandatory before any ethical hacking test?

Difficulty: EasyType: MCQTopic: Scope Rules

To gain explicit authorization and define boundaries that keep testing lawful and safe
To make reports look longer for management
To avoid writing a final report
To ensure testers can attack any third-party system

Authorization proves consent and sets legal and safety limits. A good scope lists in-scope assets, time windows, contact paths, and what is out of bounds. This avoids accidental disruption and legal trouble.

Correct Answer: To gain explicit authorization and define boundaries that keep testing lawful and safe

Example Code

Scope: targets=[api.example.com, 203.0.113.0/24]; OOS=[prod-db]; window=Sat 01:00–05:00; emergency=+1-555-0100

2. Which ordering matches the common PTES workflow?

Difficulty: EasyType: MCQ

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All Ethical hacking Interview Questions

Overview

1. Why is a written scope and Rules of Engagement mandatory before any ethical hacking test?

2. Which ordering matches the common PTES workflow?

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3. In ethical hacking, what does “without authorization” generally imply for legality?

4. What is the purpose of a Safe Harbor clause in a vulnerability disclosure or bounty program?

5. Which activity is typically out of scope for standard penetration tests unless explicitly allowed?

6. Before running a phishing simulation, what ethical requirement must be met?

7. Why keep a chain of custody when handling sensitive evidence during an engagement?

8. Which option best describes the NIST testing flow for ethical hacking style assessments?

9. A strong Vulnerability Disclosure Policy should include which element?

10. How should an ethical hacker write a high-impact finding so it drives action?

11. State three ethical principles you follow during a test and why they matter.

12. You discovered personal data while testing. What steps do you take?

13. If you trigger a potential outage during testing, how do you respond?

14. What is the safest approach to test brute-force protections on a production login?

15. You gained low-privilege shell on a server in scope. How do you apply ethical post-exploitation?

16. What is the key difference between passive and active reconnaissance?

17. Which option lists mostly passive subdomain discovery sources?

18. Why are Certificate Transparency logs useful in recon?

19. Which search query best finds public PDFs under a domain?

20. In Shodan, which filter narrows results to an organization’s owned ranges?

21. Which DNS record is most helpful to map mail infrastructure during recon?

22. Why do testers review robots.txt during information gathering?

23. Which step helps you pivot from a company name to its netblocks for scope discovery?

24. Which tool and mode is typically used for active subdomain brute forcing?

25. What useful clues can document or image metadata reveal during OSINT?

26. State three ethical rules to follow during OSINT on a live company.

27. Outline a quick recon playbook for a new target domain that keeps risk low.

28. When would you choose Amass passive mode versus active mode?

29. How would you safely discover corporate email patterns and related attack surface?

30. What details should your recon evidence log capture so findings are reproducible?

31. Which Nmap option performs a TCP SYN or half-open scan?

32. Why are UDP scans slower and often less reliable than TCP scans?

33. Which flag enables service and version detection in Nmap?

34. Which Nmap option attempts remote OS fingerprinting?

35. What does Nmap’s NSE (Nmap Scripting Engine) provide?

36. Which NSE category is generally safe for production scanning without causing changes?

37. What does Nmap’s -T4 do?

38. Which option disables host discovery and treats targets as online?

39. Which simple technique is commonly used to capture a service banner on a TCP port?

40. Which NSE script family helps enumerate Windows SMB shares and users?

41. State three precautions to keep network scans safe on production systems.

42. How do you speed up UDP enumeration while keeping reasonable accuracy?

43. You see 80 and 443 open. What quick HTTP enumeration steps do you run?

44. You get many open ports. How do you prioritize follow-up testing?

45. How do you reduce scan noise to avoid tripping rate limits and IDS while still learning enough?

46. In the OWASP Top 10 (2021), which risk jumped to A01 and is now the most common cause of serious web issues?

47. What is the safest general defense pattern against SQL Injection in modern apps?

48. Which statement correctly contrasts Reflected or Stored XSS with DOM XSS?

49. Which example best fits OWASP A05: Security Misconfiguration?

50. Which choice is a practical fix under A02: Cryptographic Failures?

51. Under A07: Identification and Authentication Failures, which practice is most effective?

52. What is the best high-level approach for A06: Vulnerable and Outdated Components?

53. Which defense set most directly reduces SSRF risk (A10)?

54. What is the goal of A09: Security Logging and Monitoring Failures?

55. When planning a web test, which OWASP resource provides step-by-step checks for common areas like auth, input, and config?

56. During manual web testing, which Burp Suite tools pair helps you intercept then fine-tune a single request repeatedly?

57. What is the most reliable mitigation for CSRF on state-changing requests?

58. Walk through a safe, step-by-step method to test for SQL Injection on a single parameter.

59. Explain a simple strategy to reduce XSS across a front-end and back-end stack.

60. How would you responsibly use Burp Intruder during an interview-style exercise to test login throttling without harming users?

61. You are reviewing a new feature. What secure design checks do you do up front to avoid A04: Insecure Design?

62. In API security, what does BOLA (Broken Object Level Authorization) usually look like?

63. What is Broken Object Property Level Authorization (BOPLA) in APIs?

64. Which situation best describes Mass Assignment in an API?

65. What is the safest default when returning objects from an API?

66. What is a solid baseline for API authentication?

67. Which JWT practice is most important for API safety?

68. Why do APIs need rate limiting and abuse controls?

69. Which CORS configuration is safest for private APIs used by your web app?

70. Which error handling approach is best for APIs?

71. Explain a safe, step-by-step API hacking workflow you would follow on a new target.

72. How would you design token storage and rotation for a single page app and API?

73. You must prevent mass assignment across many endpoints. What practical pattern would you apply?

74. How can an API gateway help reduce risk without hiding bugs?

75. During testing you find sensitive data in responses. What is the right way to handle evidence and disclosure?

76. What is a safe way to test rate limiting on a production API during an engagement?

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