- A
Resend the authorization request with the code included in the redirect URI.
Why wrong: Repeating the authorization request will generate a new code, not produce an access token.
- B
Decode the authorization code using base64 to extract the access token.
Why wrong: The authorization code is not base64-encoded access token; decoding will not produce a usable token.
- C
Use the authorization code directly in subsequent API requests as a bearer token.
Why wrong: The authorization code is a temporary credential that must be exchanged for an access token; it cannot be used directly.
- D
Exchange the authorization code for an access token by calling the token endpoint with the code and client credentials.
This is the correct step in the authorization code grant flow.
200-901 Understanding and Using APIs Practice Question
This 200-901 practice question tests your understanding of understanding and using apis. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A security team is developing an application that collects network alerts from Cisco Firepower Management Center (FMC) API. The API requires OAuth2 authorization code grant flow. After obtaining an authorization code, what must the application do to get an access token?
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
Exchange the authorization code for an access token by calling the token endpoint with the code and client credentials.
In the OAuth2 authorization code grant flow, the authorization code is an intermediate credential that must be exchanged for an access token. The application must call the token endpoint, presenting the authorization code along with its client credentials (client ID and client secret) to receive the access token. This exchange is required by RFC 6749 and is a fundamental security measure to ensure the client is authorized to obtain the token.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Resend the authorization request with the code included in the redirect URI.
Why it's wrong here
Repeating the authorization request will generate a new code, not produce an access token.
- ✗
Decode the authorization code using base64 to extract the access token.
Why it's wrong here
The authorization code is not base64-encoded access token; decoding will not produce a usable token.
- ✗
Use the authorization code directly in subsequent API requests as a bearer token.
Why it's wrong here
The authorization code is a temporary credential that must be exchanged for an access token; it cannot be used directly.
- ✓
Exchange the authorization code for an access token by calling the token endpoint with the code and client credentials.
Why this is correct
This is the correct step in the authorization code grant flow.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that the authorization code itself can be used as a bearer token or decoded to reveal the access token, when in fact it must be exchanged at the token endpoint with client credentials.
Detailed technical explanation
How to think about this question
Under the hood, the authorization code is typically a random string with a short expiration (e.g., 10 minutes) and is bound to the client ID and redirect URI. The token endpoint exchange requires the client to authenticate (often via client_secret or client assertion) and includes the grant_type=authorization_code parameter. In Cisco FMC API, the token endpoint returns an access token (often a JWT) and optionally a refresh token, which the application must store securely for subsequent API calls.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this 200-901 question test?
Understanding and Using APIs — This question tests Understanding and Using APIs — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Exchange the authorization code for an access token by calling the token endpoint with the code and client credentials. — In the OAuth2 authorization code grant flow, the authorization code is an intermediate credential that must be exchanged for an access token. The application must call the token endpoint, presenting the authorization code along with its client credentials (client ID and client secret) to receive the access token. This exchange is required by RFC 6749 and is a fundamental security measure to ensure the client is authorized to obtain the token.
What should I do if I get this 200-901 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.
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