Coding - Complete the code Archives

Blog Archives

01: String parsing & date formatting – complete the given code

Q. Complete the method “changeDateFormat(String paragraph)” which takes a string input containing dates in mm/dd/yyyy format and converts them to “dd/mm/yyyy” format. For example, “My birthday is on 04/25/1980” becomes “My birthday is on 25/04/1980”


public class Sentences {
    
    public static String changeDateFormat(String paragraph) {
        throw new RunTimeException("Complete this method.");

…

02: Working with Java Collections – Complete the given code

Q. Complete the method “canAttendAll(Collection seminars)” which takes a collection of seminar objects with start and end timestamps, and the method should determine if there is an overlap in seminars…

Members Only Content

…

03: Tree navigation – is a BST Tree?

Q. Complete the method “isValidBST(Node root)” which takes a “Tree node” as an input to evaluate if the input is a valid BST (i.e. Binary Search Tree)?



public class BinarySearchTree {
 
    public static boolean isValidBST(Node root) {
        throw new RuntimeException("To be completed");
    }

    public static void main(String[] args) { 
        Node n4 = new Node(2, null, null);
        Node n5 = new Node(4, null, null); 
        Node n6 = new Node(6, null, null);
        Node n7 = new Node(8, null, null);
        
        Node n1 = new Node(3, n4, n5);
        Node n3 = new Node(7, n6, n7);
        
        //root node
        Node n2 = new Node(5, n1, n3);
 
        System.out.println(isValidBST(n2));

…

04: Are Anagrams – Complete the given code

Q. Complete the “areAnagrams(String a, String b)” method so that it returns if two given input strings are anagram or not?


public class InputAreAnagrams {
    public static boolean areAnagrams(String a, String b) {
       throw new RuntimeException("Not yet implemented....");
    }

    public static void main(String[] args) {
        System.out.println(areAnagrams("leading", "aligned"));
    }
}

public class InputAreAnagrams {

public static boolean areAnagrams(String a, String b) {

throw new RuntimeException("Not yet implemented...."

…

05: Is a palindrome – complete the given code

Q. Complete the method “isPalindrome(String str) ” which takes a “string” as an input to evaluate if the input is a palindrome?


public class Palindrome {
    public static boolean isPalindrome(String str) {
      throw new RuntimeException("To be completed");
    }

    public static void main(String[] args) {
        System.out.println(isPalindrome("A man, a plan, a canal -- Panama"));
    }
}

public class Palindrome {

public static boolean isPalindrome(String str) {

throw new RuntimeException("To be completed");

}

public static void main(String[] args) {

System.

…

06: Change Dir Path – String parsing & working with collections

Q. Complete the method ” public DirPath cd(String newPath)” which applies the following rules: / : starting with “/” means root directory, else next directory path. ../ : means go…

Members Only Content

…

07: Index of long consecutive characters in a string – flow control

Q. Complete the method “int startIndexOfLongestRun(String input)” that returns the start index of a character that has the longest consecutive count.


public class MaxConsecutiveChar {
    public static int startIndexOfLongestRun(String input) {
       throw new RuntimeException("To be completed");
    }

    public static void main(String[] args) {
        System.out.println(startIndexOfLongestRun("aaccccccaaaaa"));
    }
}

public class MaxConsecutiveChar {

public static int startIndexOfLongestRun(String input) {

throw new RuntimeException("To be completed");

}

public static void main(String[] args) {

System.

…

08: Jumping Frog problem in Java – Complete the given code

Q. Complete the method “int numberOfWays(int n)” where n is the distance to cover and the method should return the number of possible combinations if a frog can jump 1…

Members Only Content

…

09: Find all permutations of a given string – best example to understand recursion

Q. Complete the method “Set getAllCombinations(String input) ” where input is any string and the method should return all possible combinations of a given string.


import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

public class WordPermutations {

    public static Set<String> getAllCombinations(String input) {
        throw new RuntimeException("Complete the given code");
    }

    public static void main(String[] args) {
        Collection<String> words = getAllCombinations("abc");
        for (String word : words)
            System.out.println(word);

…

10: Find all permutations of a given string – Iteration in Java

Q. Complete the method “Set getAllCombinations(String input) ” where input is any string and the method should return all possible combinations of a given string.


import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

public class WordPermutations {

    public static Set<String> getAllCombinations(String input) {
        throw new RuntimeException("Complete the given code");
    }

    public static void main(String[] args) {
        Collection<String> words = getAllCombinations("abc");
        for (String word : words)
            System.out.println(word);

…

Blog Archives

01: String parsing & date formatting – complete the given code

02: Working with Java Collections – Complete the given code

Members Only Content

03: Tree navigation – is a BST Tree?

04: Are Anagrams – Complete the given code

05: Is a palindrome – complete the given code

06: Change Dir Path – String parsing & working with collections

Members Only Content

07: Index of long consecutive characters in a string – flow control

08: Jumping Frog problem in Java – Complete the given code

Members Only Content

09: Find all permutations of a given string – best example to understand recursion

10: Find all permutations of a given string – Iteration in Java

800+ Java & Big Data Interview Q&As

200+ Java & Big Data Tutorials

Disclaimer