Pass the Oracle Oracle Cloud Solutions Infrastructure 1z0-1110-25 Questions and answers with CertsForce

Detailed Answer in Step-by-Step Solution:

Understand OCI Anomaly Detection: This service trains models to detect anomalies in multivariate data (e.g., sensor readings), requiring data to be accessible within OCI’s ecosystem.

Assess Storage Requirements: The training data must be in a scalable, OCI-compatible location that the Anomaly Detection service can access programmatically.

Evaluate Options:

A. Your local machine: Data on a local machine isn’t directly accessible to OCI services without upload, making it impractical for cloud-based training.

B. MySQL database: While OCI supports MySQL, Anomaly Detection doesn’t natively integrate with it for training data; it prefers file-based input.

C. Autonomous Data Warehouse: This is a database for analytics, not the default storage for Anomaly Detection training data, which expects CSV/JSON files.

D. Object Storage Bucket: OCI Object Storage is a scalable, durable storage service that Anomaly Detection uses to ingest training data (e.g., CSV files).

Reasoning: Object Storage is the standard for large-scale data in OCI services, offering seamless integration with Anomaly Detection via APIs or SDKs.

Conclusion: D is the correct choice as it aligns with the service’s architecture.

The OCI Anomaly Detection service requires training data to be uploaded to an Object Storage Bucket in formats like CSV or JSON. This is explicitly outlined in the official documentation, which states that users must “upload the training dataset to an OCI Object Storage bucket” before creating a data asset for model training. Local storage (A) isn’t viable for cloud processing, and databases like MySQL (B) or Autonomous Data Warehouse (C) aren’t supported as primary inputs. Object Storage (D) provides the scalability and accessibility needed for multivariate anomaly detection workflows.

Oracle Cloud Infrastructure Anomaly Detection Documentation, "Preparing Training Data" section.

Detailed Answer in Step-by-Step Solution:

Objective: Determine collaboration method in OCI Data Science (Notebook Sessions).

Evaluate Options:

A: Access control—Possible but not primary collaboration.

B: Version control (e.g., Git)—Standard for code sharing—correct.

C: Shared instance—Not supported; sessions are single-user.

D: Chat/video—Not a feature of OCI Data Science.

Reasoning: B leverages Git for team collaboration—OCI’s recommended method.

Conclusion: B is correct.

OCI documentation states: “Collaborate in Data Science by integrating version control systems like Git (B) with notebook sessions to share code and notebooks.” A is limited, C isn’t feasible, and D isn’t available—only B matches OCI’s collaboration approach.

Oracle Cloud Infrastructure Data Science Documentation, "Collaboration with Git".

Detailed Answer in Step-by-Step Solution:

Objective: Select an ADSTuner strategy to minimize cost and assess model quality.

Understand ADSTuner: Optimizes hyperparameters with configurable search spaces.

Evaluate Options:

A: Detailed—Exhaustive, high cost—incorrect.

B: No search space—False; tuning requires a space.

C: Perfunctory—Quick, low-cost assessment—correct.

D: Dictionary—Defines space but not a strategy.

Reasoning: Perfunctory balances cost and initial quality check.

Conclusion: C is correct.

OCI documentation states: “ADSTuner’s perfunctory strategy (C) performs a quick, low-cost search to assess model quality, ideal for initial tuning.” Detailed (A) is costly, B misstates requirements, and D is a method, not a strategy—only C fits the goal.

Oracle Cloud Infrastructure ADS SDK Documentation, "ADSTuner Search Strategies".

Detailed Answer in Step-by-Step Solution:

Objective: Identify Apache Spark’s ML library.

Understand Spark: A big data framework with specialized libraries.

Evaluate Options:

A: MLib (correctly MLlib)—Spark’s machine learning library.

B: GraphX—Graph processing, not ML.

C: Structured Streaming—Streaming data, not ML.

D: HadoopML—Not a Spark library (Hadoop-related).

Reasoning: MLlib is Spark’s official ML toolkit (e.g., regression, clustering).

Conclusion: A is correct (noting “MLib” should be “MLlib”).

OCI Data Science supports Spark via Data Flow, where “MLlib (Machine Learning library) provides scalable ML algorithms.” GraphX (B) and Structured Streaming (C) serve other purposes, and HadoopML (D) isn’t real—MLlib (A) is the standard, despite the typo.

Oracle Cloud Infrastructure Data Flow Documentation, "Apache Spark MLlib".

Detailed Answer in Step-by-Step Solution:

Define Feature Engineering: It’s the process of creating or modifying features to improve model performance.

Evaluate Options:

A: Parameter tuning adjusts model hyperparameters (e.g., learning rate), not features.

B: Model interpretation (e.g., SHAP values) explains predictions, not feature creation.

C: Transforming features (e.g., normalizing, encoding) is the core of feature engineering—correct.

D: Understanding features occurs during exploration, not engineering.

Reasoning: Feature engineering directly manipulates data inputs (e.g., converting timestamps to day-of-week), distinct from tuning or interpretation.

Conclusion: C is the precise definition.

OCI Data Science documentation defines feature engineering as “the process of transforming raw data into features that better represent the underlying problem to the predictive models, resulting in improved model accuracy.” Examples include scaling or creating interaction terms, aligning with C. Other options (A, B, D) relate to different ML stages.

Oracle Cloud Infrastructure Data Science Documentation, "Feature Engineering Overview".

Detailed Answer in Step-by-Step Solution:

Define Resource Principals: They allow OCI resources (e.g., notebook sessions) to authenticate to other OCI services without user credentials.

Evaluate Options:

A: False—Resource principals eliminate manual credential management.

B: False—They’re secure, leveraging IAM policies, not less secure than API keys.

C: False—Data Science supports resource principals for accessing resources (e.g., Object Storage).

D: True—Resource principals are an IAM feature authorizing resources as actors.

Reasoning: D captures the essence of resource principals as an IAM mechanism.

Conclusion: D is correct.

OCI documentation states: “A resource principal is an IAM feature that enables OCI resources, such as compute instances or notebook sessions, to act as principal actors and authenticate to other OCI services using policies.” This refutes A (no credentials needed), B (secure method), and C (supported in Data Science), making D the accurate statement.

Oracle Cloud Infrastructure IAM Documentation, "Resource Principals".

Detailed Answer in Step-by-Step Solution:

Objective: Choose the better model for cancer prediction based on metrics.

Understand Metrics:

Accuracy: Overall correct predictions.

Recall: True positives / (True positives + False negatives)—crucial for cancer (minimizing misses).

Context: Cancer prediction prioritizes recall—false negatives (missed cancers) are critical.

Evaluate Models:

Model 1: 80% accuracy, 70% recall—Misses more cancers.

Model 2: 75% accuracy, 85% recall—Misses fewer cancers.

Evaluate Options:

A: High recall—True, but lacks context.

B: High accuracy—Misses recall’s importance.

C: Recall’s impact—Correct for cancer use case—best.

D: Lesser recall impact—Incorrect for this priority.

Reasoning: C emphasizes recall’s critical role—aligns with medical needs.

Conclusion: C is correct.

OCI documentation advises: “For critical predictions like cancer detection, prioritize recall (e.g., Model 2 at 85%) over accuracy (Model 1 at 80%) to minimize false negatives, as missing cases has severe consequences (C).” A is partial, B overlooks context, D reverses priority—only C fits OCI’s ML evaluation guidance for this scenario.

Oracle Cloud Infrastructure Data Science Documentation, "Evaluating Classification Models".