1Z0-1127-25 OCI Generative AI Service Practice Test 2 — 15 Questions

Question 1

Which OCI Generative AI API should be used to generate a summary of a long legal document?

Accepted Answer

Generate API. The OCI Generative AI Generate API (option D) is specifically designed for text generation tasks, including summarization, by taking a prompt and returning a coherent response. For a long legal document, you would provide the document text as part of the prompt and instruct the model to generate a summary, making the Generate API the correct choice for this use case.

Answer

Embedding API

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Rerank API

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Chat API

Question 2

Which OCI Generative AI service component is specifically designed to convert text into numerical vectors (embeddings) that can be used for semantic search and clustering?

Accepted Answer

Embedding. The Embedding component in OCI Generative AI service is specifically designed to convert text into numerical vectors (embeddings). These embeddings capture semantic meaning, enabling use cases like semantic search and clustering by measuring vector similarity (e.g., cosine similarity).

Answer

Summarisation

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Chat

Answer

Rerank

Question 3

A company wants to build a customer service chatbot that answers questions about their internal policy documents. The documents are updated monthly, and the team cannot afford to retrain a model each time. Which approach is MOST appropriate?

Accepted Answer

Use Retrieval-Augmented Generation (RAG) with the policy documents indexed in a vector store. RAG (Retrieval-Augmented Generation) allows the LLM to retrieve relevant document sections at inference time, so knowledge stays current without retraining. The other options either require expensive retraining for each update or lack document grounding.

Answer

Fine-tune a base LLM on the policy documents monthly

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Use a larger foundation model with a longer context window and paste all documents into each prompt

Answer

Train a custom model from scratch on the policy documents each month

Question 4

You need to convert a set of customer support tickets into vector embeddings for a similarity search application. Which OCI Generative AI model should you use?

Accepted Answer

Cohere Embed (e.g., embed-english-v3.0). The Cohere Embed models are designed for text-to-vector embedding. The other options are for text generation or reranking.

Answer

Cohere Rerank

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Meta Llama 3

Answer

Cohere Command R

Question 5

A data scientist has fine-tuned a Cohere Command R model using the T-Few technique. They now need to deploy this custom model for real-time inference with low latency. What is the recommended deployment option in OCI Generative AI?

Accepted Answer

Provision a dedicated AI cluster and host the fine-tuned model on it. Dedicated AI clusters provide isolated, low-latency inference for custom fine-tuned models. Shared infrastructure is multi-tenant and may have variable latency; on-demand inference does not support custom models directly.

Answer

Use the OCI Generative AI Playground to test the model

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Use the shared infrastructure endpoint with an API call

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Create an InferenceClient pointing to the fine-tuned model directly without a cluster

Question 6

A developer is using the OCI Generative AI Chat API with Cohere Command R+ to build a multi-turn conversational agent. They want the agent to always respond in a formal tone, regardless of the user's phrasing. Which parameter should they set in the API request to achieve this consistently?

Accepted Answer

Use the 'system' parameter (or preamble_override) to provide a system message like 'You are a formal assistant'. A system message or preamble override sets the overall behavior and tone of the assistant for the entire conversation. Temperature controls randomness; max tokens limits length; stop sequences end generation — none are suitable for defining a persistent tone.

Answer

Set the 'stop_sequences' parameter to include periods

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Set the 'temperature' parameter to 0.1

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Set the 'max_tokens' parameter to 200

Question 7

A company uses OCI Generative AI Agents to build a RAG application that answers questions from documents stored in OCI Object Storage. The knowledge base is updated daily. Which step is necessary to ensure the agent incorporates the latest documents?

Accepted Answer

Re-sync the knowledge base after updating the documents in Object Storage. The knowledge base indexes the data sources. To reflect changes in the source documents, you must re-sync or re-index the knowledge base. The agent endpoint or session API does not automatically refresh content.

Answer

Use the Embedding API to manually index each new document

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Set the session API to refresh automatically

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Recreate the agent each time documents change

Question 8

You want to test different prompts and parameters (temperature, max tokens) for a summarization task using a foundation model without writing any code. Which OCI tool should you use?

Accepted Answer

OCI Generative AI Playground. The OCI Generative AI Playground provides an interactive UI to experiment with models and parameters. CLI, SDK, and console navigation are not for interactive experimentation.

Answer

OCI Console -> Generative AI -> Models

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OCI CLI with the 'oci generative-ai' commands

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Python SDK with InferenceClient

Question 9

A security administrator needs to grant a data science team access to use OCI Generative AI resources (e.g., run inference, create fine-tuning jobs) but only within a specific compartment. What is the correct IAM policy statement?

Accepted Answer

Allow group DataScientists to manage generative-ai-family in compartment Production. The 'allow group to use generative-ai-family in compartment' is the standard OCI IAM policy for granting access to all GenAI resources in a compartment. The other options have incorrect resource types or conditions.

Answer

Allow group DataScientists to manage llm-models in compartment Production

Answer

Allow group DataScientists to use all-resources in tenancy

Answer

Allow group DataScientists to read ai-services in compartment Production

Question 10

A team is fine-tuning a Llama 3 model using OCI Generative AI. The training dataset contains 10,000 prompt-completion pairs in JSONL format. After submitting the fine-tuning job, it fails with a 'Data validation error'. What is the most likely cause?

Accepted Answer

The JSONL file uses 'input' and 'output' as key names instead of 'prompt' and 'completion'. OCI fine-tuning requires a specific JSONL format with 'prompt' and 'completion' keys. If the keys are named differently (e.g., 'input'/'output'), validation fails. Model units, compartment, and base model are not typically validation issues.

Answer

The base model selected does not support fine-tuning

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The dataset is in the wrong compartment

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The fine-tuning job does not have enough model units allocated

Question 11

An application needs to generate embeddings for text in multiple languages (English, Spanish, French). Which OCI Generative AI embedding model should be used?

Accepted Answer

embed-multilingual-v3.0. The embed-multilingual-v3.0 model is designed for multilingual text. The English-only model would not handle other languages well.

Answer

embed-english-v3.0

Answer

Cohere Command R

Answer

Meta Llama 3

Question 12

You are using the OCI Generative AI Playground with a Cohere Command R model. You want the model to generate more varied and creative responses. Which parameter should you increase?

Accepted Answer

Temperature. Temperature controls the randomness of the output. Higher temperature (e.g., 0.8) makes the model more creative and varied. Max tokens, frequency penalty, and stop sequences do not primarily affect creativity.

Answer

Stop sequences

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Max tokens

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Frequency penalty

Question 13

A developer is using the OCI Generative AI Generate API (not Chat API) to create a single-turn text completion. They need to include a system-level instruction that guides the model's behavior for that request. Which parameter should they use?

Accepted Answer

'preamble_override' parameter. The Generate API uses 'preamble_override' to set a system instruction for the completion. The 'system' parameter is for the Chat API. 'max_tokens' and 'temperature' are not system instructions.

Answer

'temperature' parameter

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'system' parameter

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'max_tokens' parameter

Question 14

A company wants to use OCI Generative AI Agents for a question-answering system over their internal knowledge base stored in OCI Object Storage. The data consists of PDF and Word documents. What is the first step to make this data usable by the agent?

Accepted Answer

Create a knowledge base and associate it with the Object Storage bucket. A knowledge base must be created and linked to the data source (Object Storage bucket) so the agent can index and retrieve the content. Creating an agent first without a knowledge base would not work. The Embedding API is lower-level; the agent service abstracts this.

Answer

Use the Embedding API to generate embeddings for all documents

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Create a dedicated AI cluster for inference

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Create an OCI Generative AI Agent

Question 15

A company wants to reduce costs for a high-volume, latency-tolerant text generation workload using OCI Generative AI. Which TWO strategies should they consider?

Accepted Answer

Use on-demand (pay-per-token) pricing instead of a dedicated AI cluster. On-demand pricing (pay-per-token) and using a smaller/faster model (like Command R instead of R+) are cost-saving measures. Dedicated clusters increase cost; the largest model is more expensive; increasing temperature doesn't affect pricing.

Answer

Provision a dedicated AI cluster for consistent throughput

Answer

Increase the temperature parameter to reduce token usage

Answer

Use the largest available model to ensure best quality