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What is the main purpose of using a refresh token in a NestJS authentication system?

easy📝 Conceptual Q11 of 15
NestJS - Authentication
What is the main purpose of using a refresh token in a NestJS authentication system?
ATo store user credentials securely on the client side
BTo replace the access token permanently
CTo issue a new access token without requiring the user to log in again
DTo encrypt the user's password
Step-by-Step Solution
Solution:

  1. Step 1: Understand token roles in authentication

    Access tokens allow access but expire quickly; refresh tokens help get new access tokens without re-login.

  2. Step 2: Identify refresh token purpose

    Refresh tokens are used to request new access tokens after expiration, keeping the user logged in safely.

  3. Final Answer:

    To issue a new access token without requiring the user to log in again -> Option C

  4. Quick Check:

    Refresh token = new access token without re-login [OK]
Quick Trick: Refresh tokens renew access tokens without user login [OK]
Common Mistakes:
  • Confusing refresh token with access token
  • Thinking refresh token stores user credentials
  • Assuming refresh token replaces access token permanently

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