QUIZ 2025 ORACLE EFFICIENT FRESH 1Z0-931-25 DUMPS

Quiz 2025 Oracle Efficient Fresh 1Z0-931-25 Dumps

Quiz 2025 Oracle Efficient Fresh 1Z0-931-25 Dumps

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Oracle Autonomous Database Cloud 2025 Professional Sample Questions (Q64-Q69):

NEW QUESTION # 64
What predefined user is created when provisioning an Autonomous Database (ADB) instance to which you connect to create other users and grant roles?

  • A. SCOTT
  • B. SYS
  • C. DWDEV
  • D. ADMIN

Answer: D

Explanation:
When provisioning an Autonomous Database (ADB) instance, Oracle creates a default administrative user with extensive privileges. The correct user is:
ADMIN (B): The ADMIN user is automatically created during ADB provisioning and serves as the primary administrative account. It has full privileges to manage the database, including creating users, granting roles, and performing administrative tasks (e.g., scaling, backups). For example, after provisioning an ADB via the OCI console, you'd connect as ADMIN using the password you set, then run commands like: CREATE USER analyst1 IDENTIFIED BY "password"; GRANT CONNECT, RESOURCE TO analyst1;. This user is the entry point for initial configuration and ongoing management, authenticated via the client wallet for secure access (e.g., sqlplus admin/password@adb_high). The ADMIN user is distinct from traditional Oracle users like SYS because ADB's managed nature limits direct system-level access, funneling administration through ADMIN.
The incorrect options are:
SYS (A): In traditional Oracle databases, SYS is the superuser with ultimate control (e.g., owning the data dictionary). In ADB, however, SYS exists but is locked and inaccessible to customers due to the fully managed environment-Oracle manages system-level operations, and users connect as ADMIN instead.
DWDEV (C): There's no predefined DWDEV user in ADB. This might confuse with roles like DWROLE (for Data Warehouse developers), but no such user is created by default.
SCOTT (D): SCOTT is a sample user from older Oracle versions (with tables like EMP and DEPT), not created in ADB. It's irrelevant in this modern, managed context.
The ADMIN user's role ensures customers can manage ADB without needing Oracle's intervention, aligning with its autonomous design.


NEW QUESTION # 65
What REST verb is used to create an Autonomous Database service using REST APIs?

  • A. A "GET" REST call
  • B. An "INSERT" REST call
  • C. A "POST" REST call
  • D. A "PUT" REST call

Answer: C

Explanation:
Full Detailed In-Depth Explanation:
REST APIs use HTTP verbs:
A: True. POST creates new resources, such as an Autonomous Database instance.
B: False. GET retrieves data, not creates.
C: False. PUT updates existing resources.
D: False. INSERT is not a REST verb; it's SQL-specific.


NEW QUESTION # 66
Which two statements are correct about Autonomous Data Warehouse on Shared Exadata Infrastructure?

  • A. Parallelism is not enabled by default.
  • B. Oracle Database Result Cache is enabled by default for all SQL statements.
  • C. Compression is enabled by default. Autonomous Data Warehouse uses Hybrid Columnar Compression for all tables by default.
  • D. You have direct access to the database node.

Answer: B,C

Explanation:
Let's evaluate each statement about Autonomous Data Warehouse (ADW) on Shared Exadata Infrastructure:
A . Oracle Database Result Cache is enabled by default for all SQL statements: True. ADW enables the Result Cache by default to improve query performance by storing frequently accessed results in memory.
B . You have direct access to the database node: False. ADW is a fully managed service; users do not have direct access to underlying nodes, which Oracle manages for patching, scaling, and security.
C . Parallelism is not enabled by default: False. Parallelism is enabled by default in ADW to optimize large analytical queries across multiple CPUs.
D . Compression is enabled by default. Autonomous Data Warehouse uses Hybrid Columnar Compression for all tables by default: True. Hybrid Columnar Compression (HCC) is applied automatically to reduce storage and enhance query performance.
Thus, A and D are correct, reflecting ADW's default performance optimizations.


NEW QUESTION # 67
Which tab in the Data Load Explore tool shows the size of the table and the number of rows and columns?

  • A. Hierarchies tab
  • B. Data Sources tab
  • C. Measures tab
  • D. Statistics tab

Answer: D

Explanation:
The Data Load Explore tool in Autonomous Database helps users analyze loaded data. The correct tab is:
Statistics tab (B): The Statistics tab displays detailed metadata about a table, including its size (e.g., in MB or GB), number of rows, and number of columns. For example, after loading a CSV into a table SALES, this tab might show "Rows: 10,000, Columns: 5, Size: 2.3 MB," providing a quick overview of the dataset's scale and structure. It's designed for understanding data volume and composition, aiding decisions like partitioning or indexing.
The incorrect options are:
Hierarchies tab (A): This tab shows hierarchical relationships in the data (e.g., parent-child links), not basic table metrics like size or row count. It's more about data organization than statistics.
Data Sources tab (C): This tab lists the sources of loaded data (e.g., OCI Object Storage buckets or files), not the resulting table's properties. It focuses on origin, not metrics.
Measures tab (D): The Measures tab defines numerical aggregates (e.g., sum of sales), used for analytics, not raw table statistics like row or column counts.
The Statistics tab is the go-to for table sizing details in Data Load Explore.


NEW QUESTION # 68
Which statement is NOT correct when the Autonomous Database is stopped?

  • A. CPU billing is halted.
  • B. Tools are no longer able to connect to a stopped instance.
  • C. In-flight transactions and queries are stopped.
  • D. User with DWROLE can still access the database.

Answer: D

Explanation:
When an Autonomous Database is stopped, its operational state changes significantly:
Correct Answer (C): "User with DWROLE can still access the database" is not correct. When the database is stopped, all access is disabled, including for users with roles like DWROLE (a predefined role for Data Warehouse tasks). The database is offline, and no connections or operations are possible until it is restarted.
True Statements:
A: Tools (e.g., SQL Developer, JDBC clients) cannot connect to a stopped instance because the database services are unavailable.
B: In-flight transactions and queries are terminated upon stopping, with any uncommitted changes rolled back to maintain data consistency.
D: CPU billing ceases when the database is stopped, though storage billing continues, reflecting Oracle's pay-per-use model for compute resources.
This behavior ensures resource conservation and cost control while maintaining data integrity.


NEW QUESTION # 69
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