API Authentication u0026 Authorization Testing Quiz Quiz

1. JWT Validation

   What is the primary purpose of validating a JSON Web Token (JWT) in API authentication testing?

   1. To ensure the API server is running correctly.
   2. To verify the JWT's expiration, signature, and claims.
   3. To check the size of the JWT.
   4. To confirm the user's IP address matches the JWT's origin.
   5. To only check the token's signature against a static secret.

2. OAuth 2.0 Grant Types

   Which OAuth 2.0 grant type is most suitable for native mobile applications where the client secrets cannot be securely stored?

   1. Authorization Code Grant
   2. Resource Owner Password Credentials Grant
   3. Client Credentials Grant
   4. Implicit Grant
   5. Authorization Grant

3. RBAC Implementation

   When testing Role-Based Access Control (RBAC) in an API, what is a critical test case to include?

   1. Ensuring that all users have access to all resources.
   2. Verifying that users can only access resources permitted by their assigned roles.
   3. Checking the API's response time for different user roles.
   4. Validating the format of the role identifiers.
   5. Confirming the database connection for roles is always active.

4. API Key Security

   What is the most effective way to protect API keys from being compromised in a front-end web application?

   1. Store the API key directly in the JavaScript code.
   2. Use environment variables on the server-side and proxy API requests through the back-end.
   3. Obfuscate the API key in the client-side code.
   4. Encrypt the API key with a simple cipher.
   5. Never store API keys. Instead use public API's whenever possible.

5. Rate Limiting

   What is the primary goal of implementing rate limiting in an API?

   1. To improve the API's documentation.
   2. To prevent denial-of-service attacks and manage API usage.
   3. To reduce the size of the API responses.
   4. To increase the number of supported API versions.
   5. To simplify the API's security configuration.

6. Input Validation for Authorization

   Why is input validation crucial as part of the authorization process in an API?

   1. To speed up the authorization process.
   2. To prevent injection attacks and ensure only authorized data is processed.
   3. To reduce the size of the authorization headers.
   4. To comply with regulatory requirements for data storage.
   5. To ensure the API is easy to use.

7. Authentication vs. Authorization

   Which of the following best describes the difference between authentication and authorization?

   1. Authentication verifies identity; authorization grants access based on that identity.
   2. Authentication grants access; authorization verifies identity.
   3. Authentication and authorization are the same thing.
   4. Authentication is used for internal APIs; authorization for external APIs.
   5. Authentication uses passwords; authorization uses API keys.

8. Testing IDOR Vulnerabilities

   When testing for Insecure Direct Object Reference (IDOR) vulnerabilities in an API, what should you primarily focus on?

   1. Validating the API's response time.
   2. Ensuring that users cannot access or modify resources belonging to other users.
   3. Testing the API's error handling capabilities.
   4. Checking the API's documentation for clarity.
   5. Verifying the API's compliance with industry standards.

9. CORS Misconfiguration

   A misconfigured Cross-Origin Resource Sharing (CORS) policy can lead to which of the following security vulnerabilities?

   1. SQL injection attacks.
   2. Cross-site scripting (XSS).
   3. Denial-of-service (DoS) attacks.
   4. Unauthorized access to API resources from different origins.
   5. Data exfiltration through server side rendering.

10. Testing for Brute Force Attacks

    What is a common technique for testing an API's resistance to brute-force attacks on authentication endpoints?

    1. Disabling rate limiting to observe maximum request volume.
    2. Submitting a large number of login requests with valid credentials.
    3. Submitting a large number of login requests with invalid credentials in a short period.
    4. Analyzing the API's code for potential vulnerabilities.
    5. Using a complex password for the administrator account.