Mu Sigma Intern Interview Questions and Answers

Q1. Core java concepts,Sql queries,2 coding question based on arrays and string
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Q2. Reverse the string
Ans. 
Reverse a given string
• Use a loop to iterate through the characters of the string

• Swap the characters from start to end to reverse the string

• Return the reversed string
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Q3. Find third highest salary from a employee table
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Q1. Advance java and project related
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Q2. Springboot and spring diff
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Q3. Springboot annotations used in your project
Ans. 
Some common Springboot annotations used in projects are @RestController, @Autowired, @RequestMapping, @Service, @Component, @Repository.
• @RestController - Used to define RESTful web services.

• @Autowired - Used for automatic dependency injection.

• @RequestMapping - Used to map web requests to specific handler methods.

• @Service - Used to indicate that a class is a service.

• @Component - Used to indicate that a class is a Spring...read more
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Q4. Springboot dependencies
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Q1. In How many ways we can create objects in Java
Ans. 
Objects in Java can be created in multiple ways, including using new keyword, cloning, deserialization, and reflection.
• Using the 'new' keyword

• Cloning an existing object

• Deserialization from a file or network

• Using reflection to create objects dynamically
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Q2. Difference between Interface and Abstract Class
Ans. 
Interface is a contract that defines the methods a class must implement, while abstract class can have both implemented and abstract methods.
• Interface methods are public and abstract by default, while abstract class can have abstract and non-abstract methods.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used to achieve multiple inheritance in Java, while abstract ...read more
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Q3. What is Serialization
Ans. 
Serialization is the process of converting an object into a format that can be easily stored or transmitted.
• Serialization is used to convert complex data structures or objects into a stream of bytes.

• Serialized data can be stored in files, databases, or sent over a network.

• Common serialization formats include JSON, XML, and Protocol Buffers.
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Q1. Basic mern stack question along with some coding question.
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Q1. Same as round one. This one is in bit details.
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Q1. Basic hr round. Lot of different aspect they gave.
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Q1. 2 sum problem on number
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Q1. Json data manipulation
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Q1. Normal hr question
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10 apti test questions with 2 coding and query based questions

2 programing questions with core python concept

Q1. Gave case study based on java scheduler
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Q1. Gave programming question to solve
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Q1. Typical HR questions
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