Dexian DISYS Interview Questions and Answers

Use indexed for loop instead of for each loop to reduce time complexity.

• Indexed for loop has a constant time complexity of O(1) whereas for each loop has a time complexity of O(n).

• Indexed for loop is faster when accessing elements in an array.

• Example: for (int i = 0; i < array.length; i++) { //access array[i] }

• Example: for (String str : stringArray) { //access str }

I prefer Java as it is versatile, widely used, and has a strong community support.

• Java is versatile and can be used for a variety of applications

• Java is widely used in enterprise environments

• Java has a strong community support with a large number of libraries and frameworks available

Classes are blueprints for creating objects in object-oriented programming. Objects are instances of classes.

• Classes define the properties and behaviors of objects

• Objects are instances of classes that contain data and methods

• Classes can inherit properties and behaviors from other classes

• Objects can interact with each other by calling methods on each other