Free IBM C1000-138 Exam Actual Questions

The questions for C1000-138 were last updated On Jun 10, 2025

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Question No. 1

How can an application developer create a better app using APIs?

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Correct Answer: A

Application developers can create better apps using APIs by combining multiple APIs to create composite apps. This approach allows developers to leverage the functionality of different APIs to create more valuable and innovative applications. By combining APIs, developers can access a wider range of data and functionality, create more personalized experiences, and solve complex problems more effectively.


IBM API Connect: Creating Composite APIs

IBM API Connect: Building Better Apps with APIs

Question No. 2

Which component provides insight into API usage?

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Correct Answer: C

API Analytics provides insight into API usage. It offers a comprehensive set of tools and metrics to monitor and analyze API performance, usage patterns, and user behavior. This information is valuable for understanding API adoption, identifying trends, and making data-driven decisions to improve API management.


IBM API Connect: API Analytics

IBM API Connect: Monitoring and Analyzing API Usage

Question No. 3

The DevOps team would like to incorporate API unit testing into the build and deploy step.

What could the API Connect Test application create to allow unit testing of their APIs?

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Correct Answer: C

The API Connect Test application can create mock tests to allow unit testing of APIs. Mock tests simulate the behavior of real APIs, allowing developers to test their code in isolation without relying on external dependencies. This can help to improve the quality and reliability of APIs.


IBM API Connect: API Connect Test Application

IBM API Connect: Unit Testing APIs

Question No. 4

The GraphQL developer incorporated a field that should not be available for introspection or validation by the client.

How would the API developer obfuscate the field so clients will not view them?

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Correct Answer: B

To obfuscate a field in a GraphQL schema so that it is not available for introspection or validation by the client, the API developer can apply the @hide directive to the field. This directive tells the GraphQL engine to exclude the field from the schema introspection and validation process, making it invisible to clients.


IBM API Connect: GraphQL API Development

IBM API Connect: GraphQL Schema Directives

Question No. 5

After a developer selects Secure using Client ID, what header is required when executing the API?

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Correct Answer: D

When a developer selects 'Secure using Client ID' in API Connect, the required header for executing the API is X-IBM-Client-Id. This header is used to authenticate the client and ensure that it has the necessary permissions to access the API.


IBM API Connect: Securing APIs with Client IDs

IBM API Connect: API Security