Infosys Interview Questions, Process, and Tips

I gave Aptitude Test in 1st round

Q1. Explain DML and DQL
Ans. 
DML stands for Data Manipulation Language and is used to manipulate data in a database. DQL stands for Data Query Language and is used to retrieve data from a database.
• DML is used to insert, update, delete, and retrieve data in a database

• Examples of DML commands include INSERT, UPDATE, DELETE

• DQL is used to retrieve data from a database

• Examples of DQL commands include SELECT
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Q2. Explain exception handling in java
Ans. 
Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.
• Exceptions are objects that are thrown at runtime when an error occurs

• Try block is used to enclose the code that might throw an exception

• Catch block is used to handle the exception and provide a specific response

• Finally block is used to execute code regardless of whether an exception is thrown or not

• Example: try { // code tha...read more
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Easy. Basic questions

Medium difficulty. 2 coding rounds. Easy and hard.

Q1. Tell me about yourself
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Q2. About java programming and AWS.
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Basic Aptitude with more focus on english

Q1. Asked about the basics from the resume and basic knowedge of technologies.
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Q2. 1, Tell me about yourself. 2. SQL basic queries. 3. general awareness.
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Q1. They asked about basic concepts of java,java 8,springboot,hibernate,jdbc,multithreading ,collection and oops concept
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Q1. They asked question about my project
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Q1. They asked the related to project deliverables and how to handle the pressure in project
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Q1. What are OOPS concepts?
Ans. 
OOPS concepts are fundamental principles of Object-Oriented Programming that help in designing and implementing software systems.
• Encapsulation: Bundling data and methods together in a class.

• Inheritance: Creating new classes from existing ones, inheriting their properties and behaviors.

• Polymorphism: Objects of different classes can be treated as objects of a common superclass.

• Abstraction: Hiding complex implementation d...read more
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Q2. Explain the Abstract class with a real-life example
Ans. 
Abstract class is a class that cannot be instantiated and is used as a blueprint for other classes.
• An abstract class provides common attributes and methods that can be inherited by its subclasses.

• It can have both abstract and non-abstract methods.

• Abstract classes are used to achieve abstraction and provide a common interface for related classes.

• Real-life example: Animal class can be an abstract class with common attrib
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Q3. What are the benefits of Cloud Technologies?
Ans. 
Cloud technologies offer numerous benefits such as scalability, cost savings, flexibility, and increased collaboration.
• Scalability: Cloud technologies allow businesses to easily scale their resources up or down based on demand.

• Cost savings: Cloud services eliminate the need for upfront hardware and infrastructure investments, reducing costs.

• Flexibility: Cloud platforms provide the flexibility to access data and applica...read more
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