Wipro Plsql Developer Interview Questions and Answers

Performance tuning is the process of optimizing the performance of a system or application.

• Identifying and resolving performance bottlenecks

• Optimizing database queries and indexes

• Improving hardware and network configurations

• Reducing resource usage and improving response time

• Monitoring and analyzing system performance

Stored procedure is a precompiled program that is stored in a database and can be called by other programs.

• Stored procedures are used to encapsulate business logic and improve performance.

• PL/SQL is a procedural language used to write stored procedures in Oracle databases.

• Stored procedures can accept input parameters and return output parameters or result sets.

• They can also be used to enforce security and data integrity...read more

Create a function based on shared logic

• Identify common logic that can be reused in multiple functions

• Create a separate function to encapsulate the shared logic

• Call the shared function from other functions where the logic is needed

Types of cursors include implicit, explicit, and parameterized cursors.

• Implicit cursors are automatically created by Oracle when a SQL statement is executed.

• Explicit cursors are defined by the programmer using the DECLARE, OPEN, FETCH, and CLOSE statements.

• Parameterized cursors allow for dynamic SQL statements to be executed with different parameters.

Developed a PL/SQL project for managing inventory and sales data in a retail store.

• Designed database tables to store product information, sales transactions, and customer details.

• Implemented PL/SQL procedures and functions for adding, updating, and querying data.

• Created triggers to enforce business rules and maintain data integrity.

• Developed reports using PL/SQL queries to analyze sales performance and inventory levels

I work on performance optimization by analyzing query execution plans, indexing, and code refactoring.

• Analyzing query execution plans to identify bottlenecks

• Creating appropriate indexes to improve query performance

• Refactoring code to optimize resource usage

• Using tools like Explain Plan and SQL Tuning Advisor