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” …

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 events. …

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 {

…

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

…

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)

…

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 up …

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) {

…

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 or …

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;

…

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;

…

11: Threads performing tasks by talking to each other

Q. Given the following code


public class WorkingOnXandY {

    public static void main(String[] args) {
        SharedObject obj = new SharedObject();

        Thread thread1 = new Thread(new Runnable() {
            @Override
            public void

…

12: Complete the trades matching logic

Q. Given the following code


import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class TradeMatcher {

    private final Scanner in;
    private final BufferedWriter out;

    public TradeMatcher(Scanner

…

13: Atomicity, Visibility, & synchronization in Java

Q. Given the following code, Client


package com.homeassignment.task5;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.LockSupport;

public class Client {

    private AtomicInteger requestCount = new AtomicInteger(0);
    private

…

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