Infosys SQL Interview Questions and Answers

Round duration - 140 minutes
Round difficulty - Medium

Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.

Q1. 
Sum of Two Numbers Represented as Arrays
Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...read more
Ans. 
Given two numbers represented as arrays, calculate their sum and return the result as an array.
• Iterate through the arrays from right to left, adding digits and carrying over if necessary

• Handle cases where one array is longer than the other by considering the remaining digits

• Ensure the final sum array does not have any leading zeros
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Round duration - 20 minutes
Round difficulty - Easy

The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.

Round duration - 8 minutes
Round difficulty - Easy

This round was conducted right after finishing and clearing the technical round at the same place and on the same day.

Q1. Solid principles in c#
Ans. 
Solid principles are a set of design principles for writing maintainable and scalable code in C#.
• Single Responsibility Principle (SRP) - a class should have only one reason to change

• Open/Closed Principle (OCP) - a class should be open for extension but closed for modification

• Liskov Substitution Principle (LSP) - derived classes should be substitutable for their base classes

• Interface Segregation Principle (ISP) - client...read more
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Q1. Spring container and beans
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Q2. Annotations used in Springboot
Ans. 
Annotations are used in Springboot to simplify configuration and reduce boilerplate code.
• Annotations are used to define the behavior of Spring components

• They can be used to define the scope of a bean, inject dependencies, and handle exceptions

• Some commonly used annotations include @Component, @Autowired, and @ExceptionHandler
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Q3. Java 8 New Features and explanation
Ans. 
Java 8 introduced several new features including lambda expressions, streams, and default methods.
• Lambda expressions allow for functional programming and simplify code.

• Streams provide a way to process collections of data in a functional style.

• Default methods allow for adding new methods to interfaces without breaking existing implementations.

• Other features include the Optional class, Date and Time API, and Nashorn Java
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Q1. What is your expected package
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