Infosys Interview Questions, Process, and Tips for Experienced

Q1. Order of occurrence program
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Q1. Almost same as round 1
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Q1. Java String Based Questions
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Q2. Garbage Collections
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Q1. Asked about event driven architecture
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Q2. Asked about grpc
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Q3. Asked about recent project architecture
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Q4. Asked about microservice architecture
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Q1. What the procedure for patching in oracle apps R12.2
Ans. 
Patching in Oracle Apps R12.2 involves applying patches using adop utility and following specific steps.
• Apply patches using adop utility

• Run pre-patch and post-patch scripts

• Follow patching documentation for specific steps

• Perform patching in a non-production environment first
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Q2. How to apply R12.2 patch in faster way
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To apply R12.2 patch faster, use parallel workers, pre-install patches, and automate the process.
• Use parallel workers to speed up the patching process

• Pre-install prerequisite patches to reduce downtime during patching

• Automate the patching process using scripts or tools

• Leverage Oracle E-Business Suite's online patching feature for minimal downtime
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Apptitude test contain 4 parts - logical reasoning,verbal ability,puzzle ,code

Q1. Asked basic java questions, project and sql questions
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Q2. What is OOPS concept in java?
Ans. 
OOPS concept in Java stands for Object-Oriented Programming System, which is a programming paradigm based on the concept of objects.
• OOPS focuses on creating objects that contain both data and methods to manipulate that data.

• Key principles of OOPS include Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation involves bundl...read more
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Q3. Expalin joins in sql?
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Joins in SQL are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column between them

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• INNER JOIN returns rows when there is at least one match in both tables

• LEFT JOIN returns all rows from the left table and the matched rows from the righ...read more
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Q4. Explain your project?
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Q5. Difference between delete and drop in sql?
Ans. 
Delete is used to remove rows from a table, while drop is used to remove an entire table from the database.
• DELETE is a DML command, while DROP is a DDL command.

• DELETE statement is used with a WHERE clause to specify which rows to delete, while DROP statement is used to remove the entire table structure.

• DELETE does not remove the table itself, only the rows within it, while DROP removes the table along with all its data
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