VirtusaPolaris Full Stack Software Developer Interview Questions and Answers

30 mins round and 1 coding question

Development of a feature

Q1. Simple technical basics , plus had asked to write program on how linked list would work
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Q1. I was ghosted , no one didn't join the panel . I called and mailed the person who had scheduled the interview but he too didn't pick up the call
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Speed and distance, boat and stream

Q1. What is the difference between the DELETE and TRUNCATE commands in SQL?
Ans. 
DELETE command removes specific rows from a table, while TRUNCATE command removes all rows from a table.
• DELETE command is used to remove specific rows from a table based on a condition.

• TRUNCATE command is used to remove all rows from a table, resetting auto-increment values.

• DELETE command is slower as it logs individual row deletions, while TRUNCATE is faster as it does not log individual deletions.

• DELETE can be rolled...read more
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Q1. Based on your tech skills mentioned in your resume
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Q1. About the company and compensation
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Q1. Why do you want to leave your current workplace?
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Q1. Java vs Javascript , Meaning of Synchronization in Java , Multihreading in Js
Ans. 
Java is a backend language, Javascript is a frontend language. Synchronization in Java ensures only one thread can access a resource at a time. JavaScript is single-threaded but can handle asynchronous operations using callbacks, promises, and async/await.
• Java is a backend language used for server-side development, while JavaScript is a frontend language used for client-side scripting.

• Synchronization in Java is a techn...read more
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Q2. Write a pojo class to display the Employee Details,Pojo vs Bean
Ans. 
A Pojo class is a simple Java class that contains only private fields, public getters and setters, and no-arg constructor.
• Create private fields for employee details like name, id, salary, etc.

• Generate public getters and setters for each field.

• Include a no-arg constructor in the class.

• Example: public class Employee { private String name; private int id; public String getName() { return name; } public void setName(String...read more
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Q3. How to to compare two objects with same class (equals & Hashcode methods)
Ans. 
To compare two objects with the same class, override the equals and hashCode methods in the class.
• Override the equals method to compare the fields of the objects for equality.

• Override the hashCode method to generate a unique hash code based on the object's fields.

• Ensure that the equals and hashCode methods are consistent with each other.

• Example: public class Person { private String name; private int age; }
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Q4. Springboot questions basics like How to connect to 2 databases at a time How to change the table name in entity class(@Table)
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Q5. JPA Repository inbuilt methods
Ans. 
JPA Repository provides inbuilt methods for common database operations in Spring applications.
• JPA Repository provides methods like save(), findById(), findAll(), deleteById(), etc.

• These methods help in performing CRUD operations on entities without writing custom queries.

• For example, userRepository.save(user) saves a user entity to the database.
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