Oracle Financial Services Software Oracle Database Administrator Interview Questions and Answers

Q1. How many nodes can we implement in rac
Ans. 
Up to 60 nodes can be implemented in RAC.
• RAC stands for Real Application Clusters

• The number of nodes depends on the version of Oracle Database being used

• Oracle Database 12c supports up to 60 nodes in RAC
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Q1. What is the difference between 11i and R12
Ans. 
11i and R12 are two different versions of Oracle E-Business Suite.
• 11i is the older version, released in 2000, while R12 was released in 2007.

• R12 has a more modern architecture and improved features, such as online patching and subledger accounting.

• Upgrading from 11i to R12 requires careful planning and testing.

• Both versions are still in use, but Oracle has announced that support for 11i will end in 2020.
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Q1. How. Many years of experience do you have
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Q1. What is ur salary expectations
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General dba related questions

Q1. Technical discussion regarding oracle and experience
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Q2. Commands for rman backups and difference between them
Ans. 
RMAN backups can be performed using commands like BACKUP DATABASE, BACKUP ARCHIVELOG, BACKUP CONTROLFILE, etc.
• BACKUP DATABASE: used to backup the entire database

• BACKUP ARCHIVELOG: used to backup archived redo logs

• BACKUP CONTROLFILE: used to backup the control file

• BACKUP TABLESPACE: used to backup specific tablespaces

• BACKUP AS COPY: used to create a physical copy of data files during backup
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Q3. Dataguard questions
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Q4. How do you create schema, difference between data types
Ans. 
To create a schema, use CREATE SCHEMA statement. Data types include VARCHAR2, NUMBER, DATE, etc.
• Create a schema using CREATE SCHEMA statement

• Specify data types for columns when creating tables

• Common data types include VARCHAR2, NUMBER, DATE, etc.

• Use appropriate data types based on the type of data being stored
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Q1. This was the lead of the team and involved little technical questions and more of understanding work culture
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Q1. Basics architecture, rman, datapump, upgrade, asm
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Q1. Block corruption, upgrade, rman datapump, asm, patching
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Q1. Basics..... Speaking skills.. Salary discussion
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Q1. How do you resolve gap on a Physical Standby in Dataguard ?
Ans. 
Resolve gap on a Physical Standby in Dataguard by identifying the missing archived redo log files and manually copying them over.
• Check the alert log for errors related to missing archived redo log files

• Identify the sequence number of the missing redo log files

• Manually copy the missing archived redo log files from the primary database to the standby database location

• Register the missing redo log files using the ALTER DA
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Q2. What do you do when client complains about poor performance of Database ?
Ans. 
Investigate the issue, analyze performance metrics, identify bottlenecks, optimize queries, and implement performance tuning.
• Investigate the issue by analyzing logs, monitoring tools, and gathering information from the client.

• Analyze performance metrics such as CPU usage, memory usage, disk I/O, and query execution times.

• Identify bottlenecks in the database system such as slow queries, inefficient indexing, or hardware...read more
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Q1. Do you have knowldge on cloud ?
Ans. 
Yes, I have knowledge on cloud computing.
• I have experience working with cloud databases like Oracle Cloud Database

• I am familiar with cloud storage solutions like Amazon S3 and Google Cloud Storage

• I have implemented cloud backup and disaster recovery strategies in previous roles
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Q2. Do you have knowledge on other RDBMS ?
Ans. 
Yes, I have knowledge on other RDBMS such as MySQL, SQL Server, and PostgreSQL.
• I have experience working with MySQL, including database design and optimization.

• I am familiar with SQL Server and have performed tasks such as backup and recovery.

• I have worked with PostgreSQL and have knowledge of advanced features like partitioning and replication.
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Q1. What about your self introduction
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Q2. Tell obout your hobbies
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Q3. Tell obout your techincal skills
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Q4. This job which can be useful for you
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Q5. Tells about what about your skills
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Q6. You can reach a goal
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General dba related questions

Q1. Technical discussion regarding oracle and experience
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Q2. Commands for rman backups and difference between them
Ans. 
RMAN backups can be performed using commands like BACKUP DATABASE, BACKUP ARCHIVELOG, BACKUP CONTROLFILE, etc.
• BACKUP DATABASE: used to backup the entire database

• BACKUP ARCHIVELOG: used to backup archived redo logs

• BACKUP CONTROLFILE: used to backup the control file

• BACKUP TABLESPACE: used to backup specific tablespaces

• BACKUP AS COPY: used to create a physical copy of data files during backup
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Q3. Dataguard questions
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Q4. How do you create schema, difference between data types
Ans. 
To create a schema, use CREATE SCHEMA statement. Data types include VARCHAR2, NUMBER, DATE, etc.
• Create a schema using CREATE SCHEMA statement

• Specify data types for columns when creating tables

• Common data types include VARCHAR2, NUMBER, DATE, etc.

• Use appropriate data types based on the type of data being stored
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Q1. This was the lead of the team and involved little technical questions and more of understanding work culture
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