Infosys IT Analyst Interview Questions and Answers

One of the most difficult development tasks I have worked on was implementing a complex algorithm for real-time data processing.

• Developing a custom algorithm to handle large volumes of data in real-time

• Optimizing the algorithm for performance and efficiency

• Testing and debugging the algorithm to ensure accuracy and reliability

Yes, abstract class can have constructor.

• Abstract class can have a constructor, but it cannot be instantiated directly.

• The constructor of an abstract class is called when a concrete subclass is instantiated.

• The purpose of the constructor in an abstract class is to initialize the common state of the subclasses.

• Example: abstract class Animal { public Animal() { System.out.println('Animal constructor called'); } }

To find common elements in 2 array lists

• Iterate through both arrays and compare each element

• Use a hash set to store elements of one array and check for common elements in the other array

• Sort both arrays and use two pointers to compare elements

• Use built-in functions like intersect() in Python or array_intersect() in PHP

Yes, a constructor can be private.

• A private constructor can be used to prevent the creation of objects of a class from outside the class.

• It can also be used to implement the Singleton design pattern.

• Private constructors are declared using the private access modifier.

Spring is a framework for building Java applications, while Spring Boot is a tool for quickly creating Spring-based applications.

• Spring provides a comprehensive framework for building Java applications, while Spring Boot is a tool that simplifies the process of creating Spring-based applications.

• Spring Boot provides a set of pre-configured dependencies and an embedded web server, making it easy to get started with...read more