Infosys Sailpoint Developer Interview Questions and Answers

Strings in Java are immutable to ensure data integrity and security.

• Immutable strings prevent accidental modification of data.

• String pool optimization is possible due to immutability.

• Enhances thread safety in multi-threaded environments.

Encapsulation, Inheritance, Polymorphism, Abstraction

• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Inheritance: Ability of a class to inherit properties and behavior from another class

• Polymorphism: Ability to present the same interface for different data types

• Abstraction: Hiding the complex implementation details and showing only the necessary features

Private variables can only be accessed within the class they are declared in, while public variables can be accessed from outside the class.

• Private variables are declared using the 'private' keyword, while public variables are declared using the 'public' keyword.

• Private variables are encapsulated within the class, providing data hiding and security, while public variables can be accessed and modified from outside the c...read more