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DBA Consultant Interview Questions and Answers

Updated 23 Sep 2024

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Q1. How do you perform database backup and restoration in MSSQL?

Ans.

Performing MSSQL database backup and restoration involves using SQL Server Management Studio or T-SQL commands.

  • Use SQL Server Management Studio to perform backup and restoration tasks.

  • For backup, right-click on the database, select Tasks, then Backup. Choose the backup type, destination, and options.

  • For restoration, right-click on Databases, select Restore Database. Choose the source, destination, and options.

  • Alternatively, use T-SQL commands like BACKUP DATABASE and RESTORE ...read more

Q2. How do you optimize a slow-running query?

Ans.

Optimizing a slow-running query involves identifying bottlenecks and making adjustments to improve performance.

  • Identify the root cause of the slow query by analyzing execution plans

  • Consider creating or modifying indexes to improve data retrieval

  • Optimize the query itself by rewriting it to be more efficient

  • Update statistics on tables involved in the query to help the query optimizer make better decisions

  • Consider partitioning large tables to improve query performance

Q3. Sql server database administrator structure

Ans.

The SQL Server DBA structure includes roles such as junior DBA, senior DBA, and lead DBA.

  • Junior DBA: responsible for basic tasks such as backups and restores

  • Senior DBA: responsible for performance tuning and troubleshooting

  • Lead DBA: responsible for managing the team and making strategic decisions

  • Other roles may include database architect and database developer

  • The structure may vary depending on the organization's size and needs

Q4. What is DBMS in Oracle ?

Ans.

DBMS in Oracle stands for Database Management System, which is a software that manages the storage, retrieval, and organization of data in a database.

  • DBMS in Oracle is a software system that allows users to define, create, maintain, and control access to the database.

  • It provides an interface for users to interact with the database and perform various operations like querying, updating, and managing data.

  • Oracle Database is a popular DBMS that offers features such as data secur...read more

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