Introduction:
Database administrator (DBA) is becoming increasingly important in today’s technological-driven business environment. Across the world, more and more organizations rely on data to discover analytical insights on market conditions, new business models, and cost-cutting measures. Knowledge and capabilities make it a high-paying job, and DBAs are more in demand.
If you want a secure job in this field, a comprehensive understanding of DBAs is important. This article explores and discusses the top 10 frequently asked DBA questions and insightful answers to help you ace your interview.
What is DBA
DBAs are the backbone of an organization responsible for designing, implementing, and maintaining complex databases. With their expertise in database management systems, these professionals play an important role in optimizing performance and safeguarding the database. However, the responsibilities of DBA vary with the need of the organization they work for. Oracle DBA refers to a DBA that specializes in Oracle Database Technology.
Guide to becoming a certified DBA–
- Acquire the required qualification.
- Complete certified courses in DBA
- Get Certified
- Practice DBA and gain experience
- Understand Top Skills To Earn a DBA Program
Top 10 frequently asked questions and answer that will help you crack your DBA interview
Define Oracle and Oracle Database.
Oracle is a database server that manages an organization’s data in a very organized manner. It allows users not just to store but retrieving of data can also be done. The software that manages the database and related physical data is called the Oracle database.
What are the key responsibilities of a DBA?
The key responsibilities of DBA are to maintain, design, and implement the complex database. It also includes- Database installation and configuration, Database Design and Schema management, Capacity planning, Upgrades, and patching.
Which database management systems should a DBA be familiar with?
A DBA must be familiar with several database management systems, including IBM Db2, Microsoft SQL Server, and MongoDB.
What are the best practices for database performance tuning?
Database performance tuning involves several techniques and practices to optimize performance. These practices include monitoring performance, code optimization, identifying queries through index usage, optimizing disk through file distribution, and load balancing.
How can a DBA handle database backups and disaster recovery?
A DBA can handle database backups and disaster recovery by implementing a comprehensive strategy like establishing a backup schedule, executing regular backups, and using tools like Oracle Recovery Manager (RMAN).
What are the 5 mandatory processes of Oracle?
Mandatory background processes of Oracle are DBWn, LGWR, CKPT, SMON, PMON, and RECO.
What is the major difference between SMON and PMON oracle background processes?
PMON is the Process Monitor responsible for recovering processes when the user process fails.
SMON is a compulsory process that starts automatically and performs recovery after failure, checks temporary segments, cleans tempt segments, and coalesces free space.
When does a DBA need to set the “Large Pool“?
Large pools restrict the RMAN and MTS from competing with other subsystems. It must be set up while performing parallel operations, using Oracle automatic storage management or Real application cluster.
How to install Oracle on the Linux system?
Set up disks and kernel parameters, create a DBA group, and run the installer to begin the installation process.
What is the Emerging trends field of database administration?
The latest trends in database products bridge SQL and NoSQL, giving users the best capabilities both offer. Other trends include- Cloud-based DBMS, Augmented DBMS, In-memory databases, Graph databases, Open source DBMSs, etc.
Conclusion
Now this the right time to apply for the job and prepare for the interview. One can ace the Oracle DBA interview by answering these critical questions easily. Apart from this, your knowledge and confidence can help you score better in the interview.
