Selected MCQ

Current Question
Why is SHA-256 generally preferred over MD5 for hashing in security applications?
  • A. SHA-256 is faster
  • B. SHA-256 produces shorter hashes
  • C. SHA-256 is more collision-resistant
  • D. SHA-256 is symmetric encryption
Correct Answer: C
Explanation:
SHA-256 is considered secure against collisions, whereas MD5 is vulnerable to collision attacks.
Related Question 1
Which of these is a best practice for password security?
  • A. Writing passwords on sticky notes
  • B. Using multi-factor authentication
  • C. Reusing the same password everywhere
  • D. Sharing passwords with colleagues
Correct Answer: B
Explanation:
MFA (like combining a password with a code) greatly increases account security.
Related Question 2
What is a common use of a security certificate on websites?
  • A. To improve page speed
  • B. To prove domain ownership and enable HTTPS
  • C. To store user data
  • D. To track cookies
Correct Answer: B
Explanation:
SSL/TLS certificates authenticate website identity and enable encrypted HTTPS connections.
Related Question 3
What does 'least privilege' mean in cybersecurity?
  • A. Admins have all privileges
  • B. Users have only the access necessary for their role
  • C. Everyone has the same privileges
  • D. Turn privileges off at night
Correct Answer: B
Explanation:
Least privilege means giving users only the permissions they need, minimizing potential damage.
Related Question 4
In network security, what does a DMZ (demilitarized zone) refer to?
  • A. A private office
  • B. An isolated subnet for public-facing servers
  • C. A type of malware
  • D. A strong encryption method
Correct Answer: B
Explanation:
A DMZ is a separate network area that isolates public services (e.g., web servers) from the internal LAN.
Related Question 5
Which hashing algorithm is considered insecure due to collision vulnerabilities?
  • A. SHA-256
  • B. MD5
  • C. SHA-3
  • D. Blowfish
Correct Answer: B
Explanation:
MD5 is outdated and vulnerable to collisions; SHA-256 and SHA-3 are more secure.