Software Developer

public class Main {
   public static void main(String[] args) {
       int x = 5;
       int y = 2;
      int z = x/y
       System.out.println(z);
   }
}

Which data structure follows the Last-In-First-Out (LIFO) principle?
A) Queue
B) Stack
C) Linked List
D) ArrayAnswer

Which of the following is NOT a fundamental concept of Object-Oriented Programming (OOP)?

Encapsulation
Polymorphism
Abstraction
Sequential Execution

What are Interfaces in Java? (Learn)

You are given a string 'STR'. The string contains [a-z] [A-Z] [0-9] [special characters]. You have to find the reverse of the string.

For example:

 If the given string is: STR = "abcde". You have to print the string "edcba".

follow up:

Try to solve the problem in O(1) space complexity. 

What is the time complexity of inserting an element at the end of an ArrayList in Java?

In Java, which keyword is used to define a subclass of a class? (Learn)

You have been given a string ‘S’.

You must return the string ‘S’ sorted in decreasing order based on the frequency of characters.

If there are multiple answers, return any of them.

Example :

Let 'S'= “abAb”. 

Here the characters ‘a’ and ‘A’ have frequency 1 and character ‘b’ has frequency ‘2’.  

Therefore the sorted string is “bbAa”. 

You are given an integer array 'A' of size 'N', sorted in non-decreasing order. You are also given an integer 'target'. Your task is to write a function to search for 'target' in the array 'A'. If it exists, return its index in 0-based indexing. If 'target' is not present in the array 'A', return -1.

Note:

You must write an algorithm whose time complexity is O(LogN)