Using the Claude API

Which TWO of the following are valid ways to handle long-running conversations within the Messages API to stay within context window limits?

When designing a prompt for Claude, why is it recommended to place the most important instructions at the very beginning or the very end of the prompt?

Refer to the exhibit. An engineer wants to use Prompt Caching to optimize this request. What is the correct way to modify the request body to enable this?

When migrating from legacy Claude models to the Claude 3.5 Sonnet Messages API, what is the most important structural change you must implement?

Which of the following describes the correct behavior when using the 'stream' parameter in the Messages API?

Which TWO of the following are true about Anthropic's 'usage' metadata returned in the API response?

What is the primary function of the 'temperature' parameter in the Claude API?

When integrating Claude into an application that processes PII (Personally Identifiable Information), what is the most recommended approach to maintaining data privacy?

A developer is building an application that needs to maintain a specific tone and set of behavioral constraints across multiple turns of a conversation. Where should these instructions be placed in the Messages API call to ensure the most consistent adherence by the model?

When constructing a request for the Messages API, which TWO roles are valid within the 'messages' array?

Refer to the exhibit. An application receives this JSON response from the Claude API. Which action should the developer take to handle this specific error effectively?

A developer needs to stop Claude from generating text as soon as it produces a double newline sequence ('\n\n'). Which API parameter should be used to implement this?

A developer is implementing streaming with the Claude API. Which TWO of the following event types are standard parts of the Anthropic Server-Sent Events (SSE) stream?

When using Claude 3.5 Sonnet to process a high-resolution image via the API, which requirement must be met for the image input to be accepted?

Which HTTP header is required in every request to the Claude API to specify the version of the API being used?

A developer wants to utilize 'Tool Use' (function calling) with Claude. Which TWO steps are necessary to properly define a tool in the API request?

Refer to the exhibit. What is the specific effect of the 'tool_choice' parameter as configured in this request?

A company is using the Claude API for a customer support chatbot. They notice that the 'stop_reason' in the API response is frequently 'max_tokens'. What does this indicate about the interaction?

Which TWO of the following are valid ways to provide 'content' within a message object in the Claude API?

A developer wants to reduce latency for a complex multi-step prompt by 'pre-filling' the assistant's response. How is this achieved in the Messages API?

Which of the following headers provides information about the remaining request quota for a specific API key after a call is made?

A software engineer is building a real-time customer support chatbot using the Claude Messages API. To improve the user experience, they want the assistant's response to appear gradually on the screen as it is being generated. Which parameter must be set to true in the API request to enable this functionality?

A developer needs to configure a Claude 3 model to generate a wide variety of creative and unpredictable marketing slogans for a new product line. Which TWO parameter adjustments would best support this goal?

An application is processing very long documents through the Claude API. The developer notices that some responses are being cut off before they are naturally finished. Which property in the API response should they inspect to determine if the truncation was caused by reaching a length limit?

A developer is building a robust error-handling wrapper for the Messages API. Which THREE HTTP status codes should specifically trigger a retry logic with exponential backoff in a production environment?

When designing a high-throughput application using Claude 3, a developer is concerned about the costs of repeatedly sending a 20,000-token context in every request. Which API feature should they implement to optimize both cost and performance?

Refer to the exhibit. Based on the headers returned in the API response, what is the most immediate constraint the developer should be concerned about for their next few requests?

A developer wants to ensure that Claude always responds in a professional, concise tone and never uses emojis. What is the most effective way to implement this across all API calls in their application?

An enterprise is scaling their Claude integration and needs to manage their rate limits effectively. Which TWO strategies are recommended by Anthropic to handle rate limiting gracefully?

A company needs to summarize thousands of short customer feedback snippets every hour. Speed and low cost are their primary requirements, while the complexity of each task is very low. Which Claude 3 model should they choose for this specific API integration?

You are building a chat application using Claude 3.5 Sonnet. You need to ensure the model maintains a consistent tone and follows specific formatting constraints across a long conversation. Which approach best optimizes API usage while maintaining context?

When using the Claude API, which parameter should be adjusted if you want to influence the model's creativity and randomness?

You are processing large documents with Claude. If the document exceeds the context window, which strategy is most effective for maintaining quality results?

When calling the Claude API, what is the primary benefit of setting a 'max_tokens' value that is close to the expected output length?

You are building a high-throughput application. Which TWO of the following strategies are best for optimizing your API costs and efficiency?

A developer is building a document-summarization service with the Claude API. After upgrading from a Claude 3 model to a newer model, the application's HTTP requests start failing with a 400 error complaining about an unrecognized parameter. The developer's request body includes a field that was accepted before. Which change to the request body is MOST likely required?

A developer is writing an assistant that must always answer in strict JSON with a fixed set of keys. They want to guarantee the model's output is parseable without writing custom repair logic. Which approach best fits the Messages API?

A developer maintains a long-running support session and wants to keep the conversation coherent without exceeding the model's context window. They currently resend the entire transcript on every turn. Which approach best addresses the context limit while preserving conversational continuity?

A developer is integrating the Claude API into a production pipeline and needs to handle a response where the model stopped because it hit the output token ceiling before finishing its answer. Which TWO actions are appropriate? (Choose two.)

A developer is building a document summarization service that calls the Claude Messages API. The service must always respond in valid JSON containing exactly two fields: "summary" and "confidence". The developer wants to maximize the chance of receiving a valid JSON object without writing a custom parser. Which approach should the developer take?

A developer is sending a large knowledge-base article to the Claude Messages API for analysis. The API returns HTTP 400 with an error message indicating the input is too long. Which statement best describes the correct remediation?

A developer is writing the first integration test against the Claude Messages API using the official Anthropic SDK. The test must send a single user turn and read the model's text reply. Which request structure correctly represents the required Messages API input?

A developer wants Claude to call an internal inventory function when a user asks about stock levels, but the function must only be invoked when the model decides it is needed. The application will execute the function and return the result. Which sequence correctly implements this with the Messages API?

A developer needs Claude to always respond with a valid JSON object containing specific fields for a downstream parser. The team wants the strongest guarantee that the model's reply will conform to a defined structure. Which capability should the developer use?

A developer is implementing a retrieval-augmented generation pipeline with the Claude Messages API. Retrieved documents are inserted into the user turn, and the developer wants the model to cite which document supports each claim. Which technique most directly improves the model's ability to attribute statements to specific source documents?

A team is instrumenting its Claude Messages API integration to monitor usage and cost. Which TWO response fields should the developer log to track token consumption per request? (Choose two.)

A developer is optimizing a high-volume classification workload on the Claude Messages API. Every request shares a long, static set of instructions and few-shot examples, followed by a short variable user input. The developer wants to cut cost and latency without changing output quality. Which feature should the developer apply?

A developer wants Claude to answer questions strictly from a provided internal policy document and to refuse when the answer is not present. The team must ensure the model treats the document as authoritative reference material rather than as instructions to follow. Which approach best achieves this?

A developer is building a customer-facing assistant with the Claude Messages API and must implement multi-turn conversations that stay within context limits while remaining coherent. Which TWO practices are appropriate for managing the conversation history? (Choose two.)

A developer is building a document Q&A service on the Claude API. Each request sends the full 180-page PDF as base64 in a single text content block, and most calls now fail with a 400 error stating the request exceeds the maximum allowed size. The developer wants to keep using the same model and continue asking questions about the whole document. Which approach should the developer take?

A developer is building a backend service that calls the Claude Messages API to summarize user-submitted articles. The service must enforce a hard limit: no summary should exceed 500 tokens. The developer sets max_tokens to 500. During testing, a response returns stop_reason: "max_tokens". What is the most accurate interpretation of this result?

A team is building a support triage assistant on the Claude API. They want the model to classify each ticket into a fixed set of categories and also return a short justification, while guaranteeing that the category value is always one of five allowed strings. They are choosing between tool use with a JSON schema and free-form text output parsed with a regex. Which TWO statements correctly describe the advantages of the tool use approach in this scenario? (Choose two.)

A developer is designing a tool use workflow with the Claude Messages API. After the model returns a tool_use content block, the application executes the tool and must send the result back. Which TWO of the following are required for the follow-up request to be processed correctly? (Choose two.)

An engineer is writing a first integration against the Claude Messages API and needs to select the correct endpoint and required authentication header. The application will send a messages array with user and assistant turns and read the response content blocks. Which configuration is correct?

A developer writes a Python script that calls the Claude Messages API. The script currently reads the API key from a hardcoded string in the source file and the file is committed to a public repository. Which change best addresses the security concern while keeping the script functional?

A developer is sending a single request to the Anthropic Messages API with a system prompt and a user message. The application needs Claude to return a JSON object that strictly conforms to a predefined schema without any explanatory prose. Which request configuration should the developer use to maximize the likelihood of receiving only valid JSON?

A developer is tuning a classification workload that sends many short prompts to the Claude Messages API. They want to reduce cost and latency without changing the model or the prompt text. They set up prompt caching for the shared system prompt. Which configuration correctly enables caching for that system prompt block?

A developer is building a document-summarization service that sends very large PDFs to Claude. The first request returns a 413 error with a message indicating the request entity is too large. The developer wants to keep using the Messages API directly. Which change best resolves the error while preserving the ability to summarize the full document?

A developer wants Claude to always reply in strict JSON matching a provided schema for an internal data-extraction pipeline. They consider the tool use feature as a way to constrain output. Which statement best describes how to use tool use to reliably obtain schema-conformant output?

A developer is writing code that calls the Anthropic Messages API and needs to authenticate each request. The developer has retrieved the API key from a secure secret manager at runtime. Where should the API key be placed in the HTTP request?

A team is instrumenting a production Messages API integration and wants to programmatically detect throttling and transient server faults so their client library can back off and retry. Which TWO HTTP status codes should their response handler treat as retryable conditions? (Choose two.)

A developer is building a multi-turn assistant that must remember details from earlier in a long conversation. After many exchanges, the developer notices that Claude starts forgetting information provided near the beginning of the session. The application currently sends only the latest user message with each API call. What is the most likely cause and the appropriate fix?

A developer is implementing retry logic for calls to the Anthropic Messages API in a production service. The service must handle transient failures gracefully without overwhelming the API. Which TWO practices should the developer implement? (Choose two.)

An engineer is designing a multi-tenant SaaS feature that lets each customer supply their own Anthropic API key, which the backend stores encrypted and uses when calling the Messages API on that tenant's behalf. A security review asks how requests should be attributed so usage can be billed back and abuse isolated per tenant. Which practice best meets this requirement?

A developer is adding a retrieval step so Claude can answer questions over a 200-page internal policy manual. The full manual exceeds the context window, so the application must select relevant sections to include in each Messages API request. Which strategy best keeps answers accurate while staying within the context limit?