CCDV-F Practice Test 2 — 10 Questions

Question 1

Refer to the exhibit. A developer is configuring an MCP server to provide an agent with database access. What is the primary purpose of the 'args' field in this configuration block?

Accepted Answer

It specifies the command-line flags and parameters used to initialize the server.. The 'args' field provides the necessary runtime parameters for the MCP server process. In this specific exhibit, it tells the 'uvx' command which package to run and which specific database file to mount. Correct configuration of these arguments is vital for the agent to successfully connect to the intended external resource.

Answer

It defines the JSON Schema for the tools provided by the SQLite server.

Answer

It lists the specific SQL queries the agent is permitted to execute.

Answer

It acts as a whitelist for authorized users of the SQLite server.

Question 2

When using tool use with streaming enabled in the Anthropic API, how does the client receive the tool arguments?

Accepted Answer

Through incremental 'input_json' deltas within content block events.. Streaming tool use involves receiving the tool call in parts. The client receives a 'content_block_start' for the tool_use, followed by multiple 'content_block_delta' events containing fragments of the JSON in the 'input_json' field. The client must accumulate these fragments and parse the final JSON string only after the 'content_block_stop' event.

Answer

As a single, complete JSON object in the first stream event.

Answer

Via a separate WebSocket channel dedicated to tool execution.

Answer

As a Base64 encoded string at the end of the message stream.

Question 3

When using Claude to process multiple independent documents in a single prompt, what is the best way to ensure Claude can refer to each document accurately in its response?

Accepted Answer

Wrap each document in tags like and .. Giving each document a unique identifier within XML tags is the most effective way to help Claude disambiguate between multiple sources. By using attributes or specific tag names like , you provide a clear reference system that the model can use in its reasoning and output, preventing it from mixing up details between different texts.

Answer

Separate the documents with simple newline characters and horizontal rules.

Answer

Provide each document in a separate user message within a single API call.

Answer

Bold the title of each document at the start of its respective section.

Question 4

When constructing a request for the Messages API, where should instructions that guide Claude's personality, tone, and global constraints be placed for optimal performance and architectural clarity?

Accepted Answer

In the system top-level parameter outside of the messages array.. The Messages API distinguishes between the conversational flow and the operational constraints of the model. Placing instructions in the system parameter allows the model to separate the 'how' of the response from the 'what' of the user query. This structural separation is a core mechanic for building robust, steerable applications that behave consistently across different sessions.

Answer

As the first message in the messages array with the role set to 'user'.

Answer

As a hidden field within each individual content block of the user role.

Answer

Appended to the end of the last message with the role set to 'assistant'.

Question 5

In the context of MCP, what is the primary purpose of the 'List Resources' capability of a server?

Accepted Answer

To allow the client to discover data sources that can be read by the model.. Resources in MCP are a way for servers to expose data that is not necessarily an executable tool. The 'List Resources' capability allows the client to see what data sources are available—such as log files, database tables, or documentation—so the model can then 'read' those resources to gain context for its tasks.

Answer

To provide a directory of available functions the model can execute.

Answer

To enumerate the hardware specifications of the host machine.

Answer

To list the active connections currently handled by the MCP Client.

Question 6

A developer is designing a subagent architecture with the Claude Agent SDK. The main agent delegates a codebase audit to a specialized subagent to keep the primary conversation focused. Which TWO practices help ensure the delegation works correctly? (Choose two.)

Accepted Answer

Give the subagent a narrowly scoped task description and only the tools it needs for the audit.. Effective delegation depends on isolation and distillation. Scoping the subagent's task and tools keeps it focused and safe, while returning a concise structured summary preserves the main agent's context budget and attention. Sharing full history, granting broad tools, or dumping raw logs all reintroduce the noise that subagents are meant to filter out.

Answer

Configure the subagent with the same broad toolset as the main agent to maximize flexibility.

Answer

Have the subagent write its raw logs directly into the main agent's message history for transparency.

Answer

Share the main agent's entire conversation history with the subagent so it has maximum context.

Question 7

A developer is building a Claude-powered agent that calls an internal `search_customer_notes` tool. The agent runs with a system prompt that includes a user-supplied `account_id`. A security review finds that an attacker can craft a prompt injection that convinces Claude to call the tool with a different `account_id` than the one in the system prompt. Which control most directly prevents this privilege escalation while keeping the agent functional?

Accepted Answer

Pass the authenticated `account_id` from the server-side session into the tool implementation and ignore any `account_id` Claude supplies in tool arguments.. Authorization decisions must be enforced outside the model. Because Claude can be manipulated by prompt injection, any parameter that determines which records are accessible must come from a trusted server-side session rather than from model output. Binding the account_id server-side keeps the agent useful while ensuring it cannot be tricked into reading another customer's notes.

Answer

Increase the tool's rate limit so that mass enumeration of account IDs is impractical.

Answer

Use a more capable Claude model with stronger instruction-following to reduce injection success.

Answer

Add a sentence to the system prompt instructing Claude to never change the `account_id` value.

Question 8

A developer is building a pipeline that summarizes a 200-page technical manual with Claude Sonnet. The manual is too long for a single request, so the developer splits it into 40 chunks and summarizes each chunk independently. The final summaries must remain factually consistent with one another and with the source, and the developer has a fixed token budget. Which two techniques should the developer apply to keep the chunk summaries consistent and grounded? (Choose two.)

Accepted Answer

Carry a running 'state' summary of key entities, definitions, and decisions forward into each subsequent chunk request.. Cross-chunk consistency requires either shared context or a reconciliation step. Carrying a running state forward gives each request the key facts established earlier, while a verification pass that reconciles adjacent summaries catches contradictions before they propagate. Together they maintain grounding and consistency within a bounded token budget, unlike duplicating output or resending all prior text.

Answer

Include the full text of all previously processed chunks in every new request.

Answer

Ask the model to summarize each chunk twice and concatenate both outputs to increase coverage.

Answer

Lower the temperature to zero and rely on deterministic sampling to guarantee identical facts across chunks.

Question 9

A developer is architecting a system where Claude must interact with a proprietary internal database. According to the Model Context Protocol (MCP) architecture, which component is responsible for surfacing the database schemas and handling the actual execution of the SQL queries?

Accepted Answer

MCP Server. In the Model Context Protocol architecture, the MCP Server is the specific component designed to host tools and resources. It acts as the interface to local or remote data sources, providing the necessary context and execution environment. Understanding this separation of concerns is vital for developers to ensure that security boundaries and data access are managed correctly within the MCP ecosystem.

Answer

MCP Client

Answer

MCP Transport

Answer

MCP Host

Question 10

A developer is building a pipeline that uses Claude to convert free-text incident reports into a strict JSON object with fields severity, services, and summary. During testing, roughly 8 percent of outputs include a friendly preamble such as 'Sure, here is the JSON:' or wrap the object in markdown code fences, which breaks the downstream parser. The developer has already described the schema precisely in the prompt. What is the most reliable next step to eliminate the malformed outputs?

Accepted Answer

Add a few-shot example showing the exact JSON output with no preamble, and pre-fill the assistant turn with an opening curly brace so Claude must continue the object.. Pre-filling the assistant turn with an opening curly brace forces the model to begin inside the object, making a preamble or code fence structurally impossible. Pairing that constraint with a few-shot example that shows the exact no-preamble form teaches the desired surface pattern and covers cases where the schema itself is ambiguous.

Answer

Lower the temperature to zero and add the sentence 'Respond only with JSON' to the end of the user message.

Answer

Wrap the schema description in <json_schema> tags and instruct Claude to output only what matches the schema.

Answer

Increase max_tokens so the model has room to finish the JSON object without truncation.