A number is called an Armstrong number if it is equal to the cube of its every digit. For example, 153 is an Armstrong number because of 153= 1+ 125+27, which is equal to 1^3+5^3+3^3. You need to write a program to check if the given number is Armstrong number or not., You need to write a simple Java program to check if a given String is palindrome or not. A Palindrome is a String which is equal to the reverse of itself, e.g., "Bob" is a palindrome because of the reverse of "Bob" is also "Bob." Though be prepared with both recursive and iterative solution of this problem. The interviewer may ask you to solve without using any library method, e.g. indexOf() or subString() so be prepared for that., Write a Java program to check if a given number is prime or not. Remember, a prime number is a number which is not divisible by any other number, e.g. 3, 5, 7, 11, 13, 17, etc. Be prepared for cross, e.g. checking till the square root of a number, etc., Write a program to remove duplicates from an array in Java without using the Java Collection API. The array can be an array of String, Integer or Character, your solution should be independent of the type of array., Write a program to check if two given String is Anagram of each other. Your function should return true if two Strings are Anagram, false otherwise. A string is said to be an anagram if it contains the same characters and same length, but in a different order, e.g. army and Mary are anagrams. You can ignore cases for this problem, but you should clarify that from your interview., You need to write a Java program to sort an array of integers using a quick sort algorithm. You cannot use any library method, e.g. JDK or a third party library, which means, you need to first implement the quicksort algorithm and then sort the array..

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