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Oracle Database 23ai Administration Associate Free Sample Questions

Description

Covers Oracle Database architecture and instance management, Oracle Net Services, user security, tablespace and storage management, undo data, moving data, creating PDBs, auditing, and performance.

20 free sample questions203 in the full practice test

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1Z0-182 Sample Questions

  1. Question 1

    Intermediate

    Introduction to Auditing · Create, Modify and Maintain Database Auditing

    A financial services company is implementing a unified audit policy named FIN_AUDIT_POLICY to monitor all SELECT, INSERT, and UPDATE operations on the CUSTOMERS table. After enabling the policy, the security officer notices that actions performed by the SYS user are not being captured. What must be done to ensure SYS user actions are also audited by this policy?

    Answer and explanation

    Correct answer: C

    By default, the SYS user is excluded from unified audit policies to prevent excessive audit record generation from routine administrative tasks. To include SYS actions, the AUDIT_SYS_OPERATIONS initialization parameter must be set to TRUE. The other options are syntactically incorrect or do not achieve the desired outcome; policies are not enabled with a BY SYS clause in the AUDIT statement itself.

  2. Question 2

    Intermediate

    Introduction to Performance · Measure Database Performance

    A database administrator is analyzing a performance issue where a specific batch job runs significantly slower than expected. The AWR report indicates high 'db file sequential read' wait events associated with the job's SQL statements. What is the most likely cause of this performance bottleneck?

    Answer and explanation

    Correct answer: C

    The 'db file sequential read' wait event is typically associated with single-block I/O operations, which are characteristic of index lookups or reads from ROWID access. This indicates that the database is reading many individual blocks from disk, likely via indexes. In contrast, 'db file scattered read' is associated with multi-block reads, such as full table scans. Latch contention and log file sync waits point to different types of bottlenecks.

  3. Question 3

    Intermediate

    Displaying Creating and Managing PDBs · Explain Techniques for Creating PDBs

    A DBA needs to create a new pluggable database (PDB) named SALES_PDB by cloning an existing PDB called TEMPLATE_PDB. The source TEMPLATE_PDB must remain online and available for read-write operations during the entire cloning process. Which clause must be included in the CREATE PLUGGABLE DATABASE statement to satisfy this requirement?

    Answer and explanation

    Correct answer: B

    The SNAPSHOT COPY clause allows for the creation of a PDB clone while the source PDB remains online in read-write mode. This is possible if the underlying storage system supports storage snapshots. If snapshots are not supported, the source PDB must be in read-only mode for the duration of the clone. The other options are not valid clauses for this purpose.

  4. Question 4

    Beginner

    Moving Data · Distinguish SQL*Loader Commands

    A database administrator is tasked with loading a large, comma-separated values (CSV) file named products.csv into the PRODUCTS table. The DBA wants to bypass the SQL engine and write data blocks directly to the datafiles for maximum performance. Which SQL*Loader option should be used in the control file or command line?

    Answer and explanation

    Correct answer: B

    The DIRECT=TRUE option enables a direct path load in SQL*Loader. This method bypasses much of the SQL command processing and the database buffer cache, writing formatted data blocks directly to the datafiles. This is significantly faster for large data loads than the default conventional path load, which uses standard INSERT statements.

  5. Question 5

    Beginner

    Managing Undo · Explain the Usage of Temporary Undo

    True or False: In an Oracle 23ai database, temporary undo is stored in a dedicated temporary undo tablespace.

    Answer and explanation

    Correct answer: B

    The statement is false. Temporary undo, which is generated for temporary tables, is stored in the temporary tablespace, not in a dedicated temporary undo tablespace. This improves performance by reducing the amount of redo generated for temporary data modifications.

  6. Question 6

    IntermediateMultiple answers

    Managing Storage · Explain Resumable Space Allocation

    An administrator manages a large data warehouse and needs to enable resumable space allocation for a critical overnight data loading session to prevent failures due to unexpected space shortages. What are TWO valid methods to enable this feature for the session? (Select TWO).

    Answer and explanation

    Correct answers: A, C

  7. Question 7

    Advanced

    Managing Storage · Identify Requirements for Block Space Management

    A developer needs to create a new table, APP_LOGS, which will store high-volume, transient log data. To optimize space utilization and reduce fragmentation, the administrator wants to ensure that space freed by DELETE operations is immediately available for new INSERTs within the same block. Which storage setting should be used during table creation?

    Answer and explanation

    Correct answer: D

    The requirement describes the behavior of Automatic Segment Space Management (ASSM), which is enabled by creating the table in a tablespace with SEGMENT SPACE MANAGEMENT AUTO. ASSM uses bitmaps to manage free space, allowing space from DELETE operations to be reused much more efficiently and immediately without relying on the legacy PCTUSED parameter. In ASSM tablespaces, PCTUSED is ignored. Setting PCTFREE 0 would pack blocks tightly but wouldn't guarantee immediate reuse of deleted space.

  8. Question 8

    Beginner

    Describe Oracle Database Architecture · Identify Logical and Physical Database Structures

    A new DBA is reviewing the database architecture. They need to understand which physical files store all the user and application data for the database. Which physical database structure serves this primary purpose?

    Answer and explanation

    Correct answer: C

    Data files are the physical files on disk that store the actual data of all logical structures such as tables and indexes. Control files contain metadata about the database structure. Redo log files record all changes made to the database for recovery purposes. Parameter files store initialization parameters for the instance.

  9. Question 9

    Beginner

    Configuring Oracle Net Services · Identify the Net Services Administration Components

    A systems administrator is configuring a client machine to connect to an Oracle database server. The administrator does not want to manage a local tnsnames.ora file on every client. They want to use a simplified connection string that includes the hostname, port, and service name directly. Which Oracle Net naming method should they use?

    Answer and explanation

    Correct answer: D

    The Easy Connect naming method allows clients to connect to an Oracle database without any configuration files. The connection string is provided directly in the format hostname:port/service_name. This is ideal for simple environments or when avoiding client-side configuration files like tnsnames.ora is a priority. Local Naming requires tnsnames.ora, and Directory Naming uses an LDAP directory.

  10. Question 10

    IntermediateMultiple answers

    Describe Managing Database Instances · Demonstrate Startup and Shutdown Procedures for an Oracle Database

    A database is started using the STARTUP MOUNT command. At this stage, which of the following actions can a DBA perform? (Select TWO).

    Answer and explanation

    Correct answers: B, D

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