Selected MCQ

Current Question
What is two-factor authentication (2FA)?
  • A. Using the same password twice
  • B. Two random passwords
  • C. Two different methods to verify identity
  • D. Logging in on two devices
Correct Answer: C
Explanation:
2FA requires two different types of credentials (e.g., a password and an OTP code).
Related Question 1
What is multi-factor authentication (MFA)?
  • A. A single password login
  • B. A combination of two types of credentials
  • C. A long password only
  • D. Password plus CAPTCHA only
Correct Answer: B
Explanation:
MFA uses multiple factors (such as a password and a phone code) to verify identity, increasing security.
Related Question 2
Which of the following is an example of multi-factor authentication?
  • A. Password-only login
  • B. Fingerprint plus PIN entry
  • C. Single sign-on (SSO) via Google
  • D. CAPTCHA challenge only
Correct Answer: B
Explanation:
A fingerprint (something you are) plus a PIN (something you know) is multi-factor authentication.
Related Question 3
Which algorithm allows quantum computers to factor large numbers efficiently, threatening RSA encryption?
  • A. Shor's algorithm
  • B. Dijkstra's algorithm
  • C. FFT algorithm
  • D. Quicksort
Correct Answer: A
Explanation:
Shor's algorithm can factor integers in polynomial time, which could break RSA keys.