You are analyzing a sequence diagram where a client application interacts with a RESTful API to retrieve user information. The sequence diagram shows the following steps: 1. The client sends an HTTP GET request to '/users/123'. 2. The API server validates the request and queries the database for user ID 123. 3. The database responds with user details. 4. The API server formats the response and sends an HTTP 200 status with the user data back to the client. Based on this sequence diagram, which of the following statements are correct?

A. The client uses the GET method to request data from the API.

C. The API server acts as an intermediary between the client and the database.

D. The HTTP 200 status in the response indicates a successful operation.

A. The client uses the GET method to request data from the API.

B. The database directly sends the user information to the client.

C. The API server acts as an intermediary between the client and the database.

D. The HTTP 200 status in the response indicates a successful operation.

E. The sequence diagram shows an example of a WebSocket communication.

200-901 Question 173: You are analyzing a sequence diagram where a client application... | 200-901 Dumps

200-901 practice question 173 of 204

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200-901 Question 173

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You are analyzing a sequence diagram where a client application interacts with a RESTful API to retrieve user information. The sequence diagram shows the following steps:

The client sends an HTTP GET request to '/users/123'.
The API server validates the request and queries the database for user ID 123.
The database responds with user details.
The API server formats the response and sends an HTTP 200 status with the user data back to the client.

Based on this sequence diagram, which of the following statements are correct?

A
The client uses the GET method to request data from the API.
B
The database directly sends the user information to the client.
C
The API server acts as an intermediary between the client and the database.
D
The HTTP 200 status in the response indicates a successful operation.
E
The sequence diagram shows an example of a WebSocket communication.

Show answer and explanation

Correct answers: A, C, D

Explanation

This question tests your ability to interpret a sequence diagram involving API calls and understand the roles of different components (client, API server, database) in the process. The correct answers highlight the use of the GET method, the API server's intermediary role, and the significance of the HTTP 200 status code in RESTful communications.

A. Correct.
Correct: The HTTP GET method is commonly used to request data from a RESTful API, and this is explicitly shown in step 1 of the sequence diagram.
B. Incorrect.
Incorrect: The database does not communicate directly with the client. Instead, the API server queries the database and then sends the response back to the client.
C. Correct.
Correct: The API server serves as an intermediary between the client and the database, handling the client's request and processing the database's response.
D. Correct.
Correct: HTTP 200 is a standard response code indicating that the request was successfully processed by the server.
E. Incorrect.
Incorrect: The sequence diagram involves RESTful API communication using HTTP, not WebSocket communication.

200-901 practice question 173 of 204

200-901 Question 173

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