CCDV-F Tools and MCP Integration Practice Question
Exhibit
[
{
"type": "tool_use",
"id": "toolu_01A2B3C4D5",
"name": "get_stock_price",
"input": {"ticker": "AAPL"}
},
{
"type": "tool_use",
"id": "toolu_01E6F7G8H9",
"name": "get_stock_price",
"input": {"ticker": "GOOGL"}
}
]Refer to the exhibit. Claude has generated two 'tool_use' blocks in a single response. Which approach is valid for handling these calls in the client application?
⚠ Common exam trap
Candidates incorrectly believe that Claude must process tool calls one by one, missing the capability of the API to handle multiple 'tool_use' blocks in a single response for parallel execution.
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
✓
The client can execute them in parallel and must return two tool_result blocks.
Claude supports parallel tool use, allowing it to request multiple operations at once to improve efficiency. The client can execute these calls in parallel or sequentially, but it must return a separate tool_result block for each tool_use block, ensuring the 'tool_use_id' in the result matches the 'id' provided by the model.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The client must execute them sequentially to avoid race conditions in the API.
Why it's wrong here
There is no requirement in the Anthropic API to execute tool calls sequentially. In fact, executing them in parallel is often preferred to reduce total latency. The client is responsible for managing its own local concurrency and ensuring that each tool result is correctly associated with its unique request ID.
- ✓
The client can execute them in parallel and must return two tool_result blocks.
Why this is correct
Parallel execution is a powerful feature that allows for faster response times. The client can initiate both stock price lookups simultaneously. When the results are ready, the client must send a new message back to the API containing two distinct tool_result blocks, each referencing the correct original tool_use_id.
- ✗
The client should combine both results into a single tool_result block.
Why it's wrong here
Combining results is not permitted. The API expects a one-to-one mapping between tool_use blocks and tool_result blocks. If the model asks for two separate pieces of information via two tool calls, the developer must provide two separate results so the model can correctly attribute the data to the respective queries.
- ✗
The client must discard the second call and only process the first one.
Why it's wrong here
Discarding tool calls will lead to an error or incomplete reasoning by the model. Claude expects all requested tool calls to be fulfilled. If a client ignores a tool call, the model will not have the information it specifically requested, likely resulting in a failure to answer the user's question accurately.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Anthropic exam blueprint
This CCDV-F practice question is part of Courseiva's free Anthropic 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 CCDV-F exam.