Oracle Database Administration II Free Practice Test — 30 Questions

Question 1

A financial services company needs to implement a backup strategy for its Oracle database that minimizes downtime while ensuring data consistency. The database must remain accessible to users during the backup process. Which type of backup would be most appropriate for this scenario?

Accepted Answer

Hot backup

Question 2

In a scenario where a database administrator is tasked with improving the overall reliability and performance of an Oracle Database, which of the following practices should be prioritized to achieve these goals effectively?

Accepted Answer

Implementing a comprehensive backup and recovery strategy, including regular testing of recovery procedures

Question 3

A database administrator is tasked with ensuring that their Oracle database environment complies with industry regulations while also adhering to internal best practices. They are considering various strategies to enhance compliance and security. Which approach should the administrator prioritize to effectively balance regulatory requirements with operational efficiency?

Accepted Answer

Implement a comprehensive access control policy that includes role-based access, regular audits, and encryption of sensitive data.

Question 4

A database administrator is tasked with optimizing the performance of a database that frequently encounters issues related to insufficient space for data storage. The administrator discovers that one of the data files is set to autoextend but has reached its maximum size limit. What is the most effective action the administrator should take to ensure continued performance and data availability?

Accepted Answer

Increase the maximum size limit of the data file to allow for more data storage.

Question 5

A database administrator is evaluating backup strategies for a critical production database that experiences high transaction volumes. The goal is to minimize downtime during recovery while also managing storage costs effectively. Which backup strategy would best meet these requirements?

Accepted Answer

Implement a combination of full backups weekly and incremental backups daily to balance recovery speed and storage efficiency.

Question 6

In a scenario where a company is experiencing intermittent connectivity issues between its application servers and the Oracle database, the database administrator is tasked with diagnosing the problem. The administrator suspects that the Oracle Net Services configuration might be contributing to the issue. Which of the following actions should the administrator prioritize to ensure a stable connection and improve overall network performance?

Accepted Answer

Review and optimize the listener configuration to ensure it is properly handling incoming connection requests and not overloaded.

Question 7

In a scenario where a primary database (DB1) has an average transaction processing time of $T_1 = 0.5$ seconds, and a standby database (DB2) has an average transaction processing time of $T_2 = 0.3$ seconds, what is the percentage improvement in processing time when switching from DB1 to DB2 for $N$ transactions?

Accepted Answer

$40\%$

Question 8

In a scenario where a database administrator needs to recover a table that was mistakenly modified during a critical operation, which Flashback Technology feature would be the most appropriate choice to restore the table to its previous state without affecting other database operations?

Accepted Answer

Flashback Table

Question 9

A database administrator is tasked with optimizing a large sales database that has been experiencing performance issues during peak hours. The administrator considers implementing partitioning to improve query performance. Which partitioning strategy would be most effective if the majority of queries filter data based on the sales date, and the database is expected to grow significantly over the next few years?

Accepted Answer

Range partitioning based on sales date

Question 10

In a corporate environment, the database administrator is tasked with enhancing the security of the Oracle Database by implementing a robust password management policy. Which of the following strategies would best ensure that users adhere to strong password practices while minimizing the risk of unauthorized access?

Accepted Answer

Enforce a policy that requires passwords to be at least 12 characters long, including a mix of uppercase letters, lowercase letters, numbers, and special characters, and mandate a password change every 90 days.

Question 11

In a scenario where a database administrator is tasked with manually creating a new Oracle database for a financial application, which of the following steps should be prioritized to ensure the database is set up correctly and securely?

Accepted Answer

Configure the initialization parameter file to define memory allocation and process limits before executing the CREATE DATABASE command.

Question 12

A database administrator is tasked with improving the performance of an Oracle database that is experiencing slow response times during peak usage hours. After reviewing the performance metrics, the administrator identifies that the SGA is currently set to a low value, while the PGA appears to be adequately sized. What should the administrator prioritize to enhance the database performance effectively?

Accepted Answer

Increase the SGA size to allow more data caching and reduce disk I/O.

Question 13

In a scenario where a database administrator is tasked with managing a multitenant architecture in Oracle Database 12c, which of the following statements best describes the relationship between the container database (CDB) and the pluggable databases (PDBs) in terms of administration and resource management?

Accepted Answer

The CDB manages the overall resources and configuration, while each PDB operates independently with its own users and settings.

Question 14

In a scenario where a database administrator is tasked with manually creating a new Oracle database for a financial application, which of the following steps should be prioritized to ensure the database is set up correctly and securely?

Accepted Answer

Define the initialization parameters in the parameter file to optimize memory usage and set the character set for the application.

Question 15

In a corporate database, the HR department wants to ensure that no employee can be assigned a salary greater than $200,000. To enforce this rule, the database administrator decides to implement a trigger. Which of the following approaches would best achieve this requirement while ensuring that the trigger operates efficiently and maintains data integrity?

Accepted Answer

Create a BEFORE INSERT trigger that checks the new salary value against the $200,000 limit and raises an error if the limit is exceeded.

Question 16

In a scenario where a database administrator is tasked with creating a new Oracle database for a high-traffic e-commerce application, which feature of the Database Configuration Assistant (DBCA) would be most beneficial in ensuring that the database is optimized for performance and scalability from the outset?

Accepted Answer

The ability to customize initialization parameters during the database creation process

Question 17

In a scenario where a database administrator has enabled Automatic Memory Management (AMM) for an Oracle Database, they notice that the performance of the database is fluctuating during peak usage times. The administrator suspects that the MEMORY_TARGET parameter may not be optimally set. What is the most effective approach for the administrator to take in order to diagnose and resolve the performance issues related to AMM?

Accepted Answer

Monitor the memory usage statistics using the V$MEMORY_DYNAMIC_COMPONENTS view to assess how memory is being allocated and adjust the MEMORY_TARGET parameter accordingly.

Question 18

A database administrator is tasked with optimizing the performance of an Oracle database that experiences fluctuating workloads. The administrator considers adjusting the memory configuration to better accommodate these changes. Which approach should the administrator take to effectively manage memory allocation in this scenario?

Accepted Answer

Implement Automatic Memory Management (AMM) to allow the database to dynamically adjust memory allocation based on workload demands.

Question 19

A database administrator is tasked with improving the performance of a frequently queried table that is also subject to regular updates. The administrator considers adding an index to the table to enhance read performance. However, they are concerned about the potential impact on write operations. What is the most appropriate action the administrator should take to balance the performance of both read and write operations?

Accepted Answer

Evaluate the specific queries being run against the table and consider indexing only the columns that are frequently used in WHERE clauses.

Question 20

In a scenario where a database administrator is troubleshooting performance issues in an application that utilizes Remote Procedure Calls (RPCs) to interact with an Oracle database, which approach would most effectively enhance the efficiency of these RPCs while ensuring data integrity and security?

Accepted Answer

Implementing a caching mechanism to store frequently accessed data and reduce the number of RPC calls made to the database.

Question 21

A database administrator is tasked with migrating a large schema from one Oracle database to another. They decide to use Data Pump for this operation. During the export process, they want to ensure that only specific tables are included while excluding others that are not necessary for the migration. Which approach should the administrator take to achieve this goal effectively?

Accepted Answer

Use the INCLUDE and EXCLUDE parameters in the Data Pump export command to specify the desired tables and exclude the unnecessary ones.

Question 22

In a scenario where a database administrator notices that the database is experiencing slow performance during peak hours, they suspect that background processes may not be functioning optimally. Which background process is primarily responsible for writing modified data from memory to disk, and how does its performance impact overall database efficiency?

Accepted Answer

Database Writer (DBWn)

Question 23

A database administrator is tasked with configuring the System Global Area (SGA) for an Oracle Database. If the total SGA size is set to $S$ megabytes, and the Database Buffer Cache is allocated 60% of the SGA, the Shared Pool 30%, and the Redo Log Buffer 10%, what will be the size of the Shared Pool when the total SGA size is increased to 128 megabytes?

Accepted Answer

$38.4 	ext{ MB}$

Question 24

A financial institution is implementing standard auditing to monitor access to sensitive customer data. The database administrator is tasked with configuring the auditing settings to ensure that all SELECT operations on the customer table are logged. However, the administrator is also concerned about the potential performance impact of extensive auditing. Which approach should the administrator take to effectively balance security and performance?

Accepted Answer

Enable standard auditing specifically for SELECT operations on the customer table while limiting the audit trail to only the most critical users.

Question 25

A database administrator is designing a new table to store employee information, including employee ID, name, department ID, and salary. The administrator wants to ensure that each employee has a unique employee ID and that the department ID corresponds to a valid department in another table. Which type of constraint should the administrator implement to achieve this?

Accepted Answer

A primary key constraint on the employee ID and a foreign key constraint on the department ID

Question 26

A financial services company needs to implement a backup strategy for its Oracle database that minimizes downtime while ensuring data integrity. The database must remain accessible to users during the backup process. Which backup method should the database administrator choose to meet these requirements?

Accepted Answer

Hot backup

Question 27

A database administrator is tasked with designing a backup strategy for a critical production database that experiences frequent updates. The administrator wants to minimize backup time and storage requirements while ensuring that recovery can be performed quickly in case of a failure. Which backup strategy should the administrator implement to achieve these goals effectively?

Accepted Answer

Implement a combination of full backups weekly and incremental backups daily to capture changes efficiently.

Question 28

A database administrator notices that their Oracle database is experiencing slow performance during peak usage times, particularly with complex queries that involve sorting and joining large datasets. After reviewing the memory allocation, they suspect that the current settings for the SGA and PGA may not be optimal. What is the most effective first step the administrator should take to address this issue?

Accepted Answer

Analyze the current SGA and PGA settings to identify potential bottlenecks and adjust the memory allocation accordingly.

Question 29

In a scenario where a database administrator is tasked with improving the performance of an Oracle database that has been experiencing slow response times, which monitoring tool would be most effective for identifying long-term performance trends and potential bottlenecks?

Accepted Answer

Oracle Enterprise Manager (OEM)

Question 30

A database administrator notices that the performance of the Oracle database has significantly degraded during peak usage hours. To effectively diagnose the underlying issues, which diagnostic tool should the administrator utilize to gain comprehensive insights and actionable recommendations for performance improvement?

Accepted Answer

Automatic Diagnostic Monitor (ADDM)

Oracle Database Administration II Free Practice Test — 30 Questions

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