- A
Validate and sanitize all user inputs
Input validation prevents injection attacks.
- B
Expose all API endpoints automatically for transparency
Why wrong: Exposing all endpoints increases attack surface; only needed endpoints should be exposed.
- C
Allow mass assignment for ease of development
Why wrong: Mass assignment can lead to data tampering; it should be explicitly defined.
- D
Implement rate limiting to prevent abuse
Rate limiting mitigates brute force and DoS attacks.
- E
Apply least privilege to API keys and roles
Least privilege limits the impact of compromised credentials.
Question 628 of 1,000
CCSP Cloud Application Security Practice Question
This CCSP practice question tests your understanding of cloud application security. 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.
Which THREE of the following are recommended practices for securing cloud application APIs? (Select three.)
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
✓
Validate and sanitize all user inputs
Rate limiting, input validation, and least privilege are key API security practices. Mass assignment is a vulnerability to avoid, not a practice, and exposing all endpoints is contrary to security.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Validate and sanitize all user inputs
Why this is correct
Input validation prevents injection attacks.
Related concept
Authentication checks who the user is.
- ✗
Expose all API endpoints automatically for transparency
Why it's wrong here
Exposing all endpoints increases attack surface; only needed endpoints should be exposed.
- ✗
Allow mass assignment for ease of development
Why it's wrong here
Mass assignment can lead to data tampering; it should be explicitly defined.
- ✓
Implement rate limiting to prevent abuse
Why this is correct
Rate limiting mitigates brute force and DoS attacks.
Related concept
Authentication checks who the user is.
- ✓
Apply least privilege to API keys and roles
Why this is correct
Least privilege limits the impact of compromised credentials.
Related concept
Authentication checks who the user is.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CCSP questions on access control and AAA configuration.
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FAQ
Questions learners often ask
What does this CCSP question test?
Cloud Application Security — This question tests Cloud Application Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Validate and sanitize all user inputs — Rate limiting, input validation, and least privilege are key API security practices. Mass assignment is a vulnerability to avoid, not a practice, and exposing all endpoints is contrary to security.
What should I do if I get this CCSP question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CCSP questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jul 4, 2026
This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.
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