PLSQL Developer Interview Questions 2025

What is the difference between a function and a procedure?
Explain the use of %ROWTYPE in PL/SQL.
How does exception handling work in PL/SQL?
What are the types of exceptions in PL/SQL?
How can you optimize a PL/SQL block for performance?
What are triggers? Explain different types of triggers in Oracle.
What is a cursor in PL/SQL? How is an explicit cursor different from an implicit one?
Explain mutating table errors. How do you avoid them?
How does bulk collect improve performance in PL/SQL?
What are autonomous transactions in Oracle? Provide a use case.
Explain the role of collections in PL/SQL and their types.
How can you debug PL/SQL code?
What are ref cursors, and where are they used?
How do packages work in PL/SQL? Explain with an example.
What is the difference between IN, OUT, and IN OUT parameters?
What are materialized views, and how do they differ from standard views?
How do you perform DML operations within a PL/SQL block?
What are sequences in Oracle, and how do you use them?
Explain dynamic SQL in PL/SQL and its advantages.
How would you implement error logging in PL/SQL?

What are the various types of joins in SQL?
Explain the difference between WHERE and HAVING clauses.
How do you ensure data integrity in SQL?
What is indexing, and when would you use it?
Describe how a correlated subquery works.
Explain normalization and its types.
How would you identify and eliminate duplicate rows in a table?
What is a view in SQL, and how does it help with security?
How do you perform performance tuning in SQL queries?
What is the purpose of the MERGE statement in Oracle?
Describe partitioning in Oracle databases.
What is a CASE statement? Provide an example.
How would you retrieve the third-highest salary from an employee table?
What is the difference between ROWNUM and ROW_NUMBER()?
Explain the concept of constraints in Oracle.
What is a composite key?
How would you create a sequence for unique IDs in Oracle?
What are analytic functions in SQL?
How can you improve query execution plans?
Explain START WITH and CONNECT BY clauses in hierarchical queries.

A user reports incorrect results in a report. How would you debug it?
You are asked to customize an existing report for a specific requirement. Walk through the steps you would take.
How would you change the default value of a field on the server side?
What would you do if a high-priority issue was assigned during off-hours?
How would you approach a requirement to update multiple related tables in one transaction?
A client wants additional filters added to an existing report. How do you ensure performance is not impacted?
A script fails in production but runs fine in development. What could be the issue, and how do you resolve it?
Explain the steps to update an error message in a server-side API.
If a code change breaks existing functionality, how would you approach fixing it?
How do you handle conflicting priorities in a multi-client support environment?

Can you describe a challenging project you worked on and how you handled it?
How do you manage working with tight deadlines?
Explain how you handle critical feedback from a manager or client.
How do you ensure clear communication with non-technical stakeholders?
Have you ever faced a situation where you couldn’t meet client expectations? How did you handle it?
How do you prioritize tasks when working under pressure?
Describe how you approach learning new tools or technologies.
Give an example of a time you worked in a team to solve a problem.
How do you handle disagreements or conflicts with team members?
What strategies do you use to stay productive during night shifts?

What are common performance tuning techniques in PL/SQL?
Explain Oracle's multi-tenant architecture.
What are the differences between Oracle Apps versions 9 and 10?
What are materialized views, and how do you refresh them?
Discuss the differences between manual and automatic statistics gathering in Oracle.
How would you manage dependencies in a complex stored procedure?
What are the features of Oracle’s autonomous database?
How does Oracle's redo log mechanism work?
What is row chaining, and how do you resolve it?
How does database partitioning improve performance?

Explain how Azure DevOps is used for version control.
How would you create a release note for a code change?
Describe the deployment process in IFS for configuration and customization changes.
What is ACP (Application Configuration Package) in IFS?
How do you debug SQL queries in PL/SQL Developer?
What is the difference between Dev, NRT, and Production environments?
How do you prepare test cases for changes in a live database?
What tools do you use to monitor database performance?
Explain your process for resolving client issues reported in a support ticket.
How do you ensure documentation is up to date for ongoing projects?

How would you design an error-logging mechanism for an application?
Describe how you would implement role-based access control in Oracle.
How do you approach schema design for a new application?
Explain the challenges of scaling an Oracle database for a large application.
How do you decide between denormalization and normalization?
Describe the considerations for creating database backups.
What are the advantages of using Oracle RAC (Real Application Clusters)?
How would you implement a high-availability setup in Oracle?
Explain the concept of data sharding and its benefits.
What factors would you consider for data migration from one Oracle database to another?

If a user reports slow performance in a specific window, what steps will you take?
How would you approach explaining a technical solution to a non-technical client?
You are given an incomplete requirement document. How will you proceed?
If a patch causes downtime in production, how do you handle it?
A project deadline has been shortened significantly. How do you manage deliverables?
How would you communicate an unfeasible request to the client?
You notice security vulnerabilities in your database. What do you do next?
How do you prepare for a knowledge transfer when joining a new team?
If assigned to a role outside your comfort zone, how would you approach it?
Your manager assigns tasks that are unclear. What will you do?