Yalamanchili Software Exports Plsql Developer Interview Questions and Answers

Q1. EXPLAIN ABOUT UR PRJECT
Ans. 
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
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Q2. How do you work on performance optimization
Ans. 
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
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Q1. Window Functions in SQL
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Window functions in SQL are used to perform calculations across a set of table rows related to the current row.
• Window functions are used to calculate values based on a set of rows related to the current row.

• They allow you to perform calculations without grouping the rows into a single output row.

• Examples of window functions include ROW_NUMBER(), RANK(), and LAG().
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Q1. Uses of Packages in PL/SQL
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Packages in PL/SQL are used to group related procedures, functions, variables, and other PL/SQL constructs together for better organization and security.
• Packages help in modularizing code for easier maintenance and debugging

• They provide encapsulation and hide implementation details

• Packages can contain multiple procedures, functions, variables, cursors, and exceptions

• They improve performance by reducing network traffic

• E...read more
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Q1. CREATE A FUNCTION BASED ONLOGIC SHARED
Ans. 
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
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Q2. FOR AN ENTITY GIVE DTAILS OF PREVOUS AND NEXT DATE FOR PARTICULAR DEPATMENT
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Oracle pl sql developer

Q1. Factorial of a number
Ans. 
Factorial of a number is the product of all positive integers up to that number.
• To calculate factorial of a number, multiply all positive integers up to that number.

• Factorial of 0 is 1.

• Example: Factorial of 5 is 5*4*3*2*1 = 120.
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Q2. Sql queries including 2nd highest salary and table joins
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Q1. Sql question and table joins
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Q2. Modelling of schema
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Modelling of schema involves designing the structure of a database to organize and represent data.
• Identify entities and their relationships

• Define attributes for each entity

• Establish primary and foreign keys

• Normalize the schema to reduce redundancy

• Consider performance and scalability
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Q1. What is packages and types
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Packages and types are two important components in PL/SQL used for organizing and defining reusable code and data structures.
• Packages are containers for related procedures, functions, variables, and other PL/SQL constructs.

• Types are user-defined data structures that can be used to define new data types in PL/SQL.

• Packages can contain types as well as other PL/SQL constructs, providing a way to organize and encapsulate r...read more
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Q1. 1. Tell me about yourself. 2. Topics like Stored procedure, functions, cursors, package.
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Q1. Types of cursors
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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.
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