LTIMindtree Engineer Trainee Interview Questions and Answers for Freshers

Interface in Java defines a set of methods that a class must implement.

• Interface in Java is a blueprint of a class. It only contains method signatures without the body.

• Classes can implement multiple interfaces but can only extend one class.

• Example: interface Animal { void eat(); } class Dog implements Animal { public void eat() { System.out.println("Dog is eating"); }}

In Java, a class is a blueprint for creating objects. It defines the properties and behaviors of objects.

• A class in Java is a template for creating objects, which encapsulates data for the object and methods to manipulate that data.

• Classes are defined using the 'class' keyword followed by the class name.

• Example: class Car { private String color; public void setColor(String c) { color = c; } }

Creating a student table in SQL with ID and name columns and setting the order of ID

• Use CREATE TABLE command to create the student table

• Specify ID and name columns with their data types

• Set the ID column as the primary key to enforce uniqueness and order

A Java program to check if a given string is a palindrome.

• Create a function that takes a string as input.

• Use two pointers, one starting from the beginning and one from the end, to compare characters.

• If all characters match, the string is a palindrome.

• Example: 'racecar' is a palindrome, 'hello' is not.

Explanation of a class in Java using a fruit class example

• A class in Java is a blueprint for creating objects. It defines the properties and behaviors of objects.

• In the case of a fruit class, properties could include name, color, and taste, while behaviors could include methods like ripen() and rot().

• Example: class Fruit { String name; String color; String taste; void ripen() { //code to ripen fruit } void rot() { //code to rot fruit }}