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Oracle Cloud Infrastructure 2025 Data Science Professional Sample Questions (Q22-Q27):

NEW QUESTION # 22
Which Oracle Data Safe feature minimizes the amount of personal data and allows internal test, development, and analytics teams to operate with reduced risk?

A. Data discovery
B. Security assessment
C. Data auditing
D. Data masking
E. Data encryption

Answer: D

Explanation:
Detailed Answer in Step-by-Step Solution:
* Objective: Identify the Data Safe feature that reduces personal data exposure.
* Understand Data Safe: Secures sensitive data in OCI databases.
* Evaluate Options:
* A: Encryption-Protects data, doesn't minimize it.
* B: Assessment-Identifies risks, doesn't alter data.
* C: Masking-Obfuscates personal data (e.g., SSNs)-correct.
* D: Discovery-Locates sensitive data, doesn't reduce it.
* E: Auditing-Tracks access, doesn't minimize data.
* Reasoning: Masking replaces sensitive data, reducing risk for teams-fits goal.
* Conclusion: C is correct.
OCI documentation states: "Data masking (C) in Data Safe transforms sensitive data into anonymized versions, minimizing exposure for test, dev, and analytics use." A protects, B assesses, D finds, E audits- only C reduces data per OCI's Data Safe features.
Oracle Cloud Infrastructure Data Safe Documentation, "Data Masking Overview".

NEW QUESTION # 23
Which type of file system does File Storage use?

A. NVMe SSD
B. NFSv3
C. Paravirtualized
D. iSCSI

Answer: B

Explanation:
Detailed Answer in Step-by-Step Solution:
* Objective: Identify the file system type for OCI File Storage.
* Understand File Storage: Network-attached storage in OCI.
* Evaluate Options:
* A: NFSv3-Network File System, used by File Storage-correct.
* B: iSCSI-Block storage protocol, not File Storage.
* C: Paravirtualized-Virtualization mode, not file system.
* D: NVMe SSD-Hardware, not file system.
* Reasoning: NFSv3 is OCI File Storage's protocol.
* Conclusion: A is correct.
OCI documentation states: "File Storage uses NFSv3 (A) as its file system protocol, providing shared storage across instances." B, C, and D are unrelated-only A aligns with OCI's File Storage design.
Oracle Cloud Infrastructure File Storage Documentation, "File System Protocol".

NEW QUESTION # 24
Which of the following analytical and statistical techniques do data scientists commonly use?

A. All of the above
B. Regression
C. Classification
D. Clustering

Answer: A

Explanation:
Detailed Answer in Step-by-Step Solution:
* Objective: Identify common data science techniques.
* Define Techniques:
* Classification: Predicts categories (e.g., spam vs. not).
* Regression: Predicts continuous values (e.g., sales).
* Clustering: Groups data (e.g., customer segments).
* Evaluate Options:
* A, B, C: All are standard ML/statistical methods.
* D: Encompasses all-correct as they're widely used.
* Reasoning: These are foundational in data science workflows.
* Conclusion: D is correct.
OCI documentation lists "classification, regression, and clustering as core techniques in data science, supported by tools like ADS SDK and AutoML." All (D) are common per OCI's ML framework, not just subsets (A, B, C).
Oracle Cloud Infrastructure Data Science Documentation, "Analytical Techniques".

NEW QUESTION # 25
Select two reasons why it is important to rotate encryption keys when using Oracle Cloud Infrastructure (OCI) Vault to store credentials or other secrets.

A. Periodically rotating keys makes it easier to reuse keys
B. Periodically rotating keys limits the amount of data encrypted by one key version
C. Key rotation improves encryption efficiency
D. Key rotation allows you to encrypt no more than five keys at a time
E. Key rotation reduces risk if a key is ever compromised

Answer: B,E

Explanation:
Detailed Answer in Step-by-Step Solution:
* Objective: Identify two reasons for key rotation in OCI Vault.
* Understand Key Rotation: Enhances security by updating keys.
* Evaluate Options:
* A: Five-key limit-False, no such restriction.
* B: Efficiency-False, not the purpose.
* C: Reuse-False, rotation prevents reuse.
* D: Reduces risk-True, limits exposure-correct.
* E: Limits data-True, reduces breach scope-correct.
* Reasoning: D and E are security-focused-key Vault benefits.
* Conclusion: D and E are correct.
OCI documentation states: "Key rotation in Vault (D) reduces risk if a key is compromised and (E) limits the data encrypted by a single key version, enhancing security." A, B, and C misrepresent rotation's purpose- only D and E align with OCI's Vault best practices.
Oracle Cloud Infrastructure Vault Documentation, "Key Rotation Benefits".

NEW QUESTION # 26
As a data scientist, you use the Oracle Cloud Infrastructure (OCI) Language service to train custommodels.
Which types of custom models can be trained?

A. Image classification, Named Entity Recognition (NER)
B. Sentiment Analysis, Named Entity Recognition (NER)
C. Object detection, Text classification
D. Text classification, Named Entity Recognition (NER)

Answer: D

Explanation:
Detailed Answer in Step-by-Step Solution:
* Objective: Identify custom model types for OCI Language service.
* Understand OCI Language: Focuses on text analysis, not images.
* Evaluate Options:
* A: Image classification-Incorrect; Language is text-based.
* B: Text classification, NER-Both text tasks-correct.
* C: Sentiment-Pretrained, not custom; NER ok-incorrect.
* D: Object detection-Image-based, incorrect.
* Reasoning: B aligns with OCI Language's custom text capabilities.
* Conclusion: B is correct.
OCI documentation states: "OCI Language supports training custom models for text classification and Named Entity Recognition (NER) (B) using user data." A and D involve images, C includes pretrained sentiment- only B matches OCI Language's custom model scope.
Oracle Cloud Infrastructure Language Documentation, "Custom Model Types".

NEW QUESTION # 27
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