200-901 Understanding and Using APIs Practice Question
Which TWO of the following are valid OAuth 2.0 grant types? (Select TWO)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Client credentials
Authorization code and client credentials are standard grant types. Basic is not OAuth 2.0. API key is a different authentication method. Implicit is deprecated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Client credentials
Why this is correct
Standard OAuth 2.0 grant for server-to-server.
- ✓
Authorization code
Why this is correct
Standard OAuth 2.0 grant type.
- ✗
API key
Why it's wrong here
API key is a separate authentication method, not OAuth 2.0.
- ✗
Basic authentication
Why it's wrong here
Basic is an HTTP authentication scheme, not an OAuth 2.0 grant.
- ✗
Implicit grant
Why it's wrong here
Implicit is deprecated in OAuth 2.0 Security BCP.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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