Darwinbox Coding Questions & Answers 2024 (Round Wise), Check Darwinbox Coding Questions

Darwinbox Coding Questions & Answers 2024 | Darwinbox Coding Questions Round 1 | Darwinbox Coding Placement Paper | Darwinbox Coding Questions Round 2 | Darwinbox Previous Coding Question Papers

Darwinbox Coding Questions & Answers 2024: Darwinbox will conduct the Coding Test for each hiring Process. Every year, they hire many employees to fill many positions. As of now, they are going to hold the test for the Darwinbox Coding. So, aspirants who are going to attend this hiring process kindly check out the Darwinbox Coding Questions & Answers before attending the process.

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All the contenders need to be good before the Test. We have provided the sample Darwinbox Round 1 Coding Questions & Answers for your preparation. With the help of this preparation good on the coding test & score good marks. If you qualify in this round only you may continue to attend the selection process, so read the article properly to get detailed information about the Darwinbox Previous Coding Questions

Darwinbox Coding Questions Round 1

Question: Order Check 

Problem Statement: In an IT company there are n number of Employees, they are asked to stand in ascending order according to their heights.But some employees are not currently standing in their correct position.

Your task is to find how many employees are there who are not standing in their correct positions.

Example

height=[1,2,1,3,3,4,3]

The 4 employees at indices 1,2,5 and 6 are not in the right positions. The correct positions are (1,1,2,3,3,3,4).Return 4.

Function Description

Complete the function countEmployees in the editor below.

count Employee has the following parameter(s):

int height[n]:an array of heights in the order the employees are standing

Returns:

Int : the number of employees not standing in the correct positions

Constraints

•    1<=n<=10^5
•    1<=height[i]<=10^9

Sample case 0

Sample input 0

7 ->height[] size n=7

1

2

1

3

3

4

3

Sample output 0:

4

Explanation

The four employees who are  not standing in the correct positions are at indices [1,2,5,6] return 4. The correct positions are [1,1,2,3,3,3,4].

JAVA PROGRAM

import java.util.*;
public class Main
{
  public static int countEmployees (int arr[])
  {
    int n = arr.length;
    int temp[] = new int[n];
    for (int i = 0; i < n; i++)
        temp[i] = arr[i];
      Arrays.sort (arr);
    int count = 0;
    for (int i = 0; i < n; i++)
      if (arr[i] != temp[i])
	  count++;
      return count;
  }
  public static void main (String[]args)
  {
    Scanner sc = new Scanner (System.in);
    int n = sc.nextInt ();
    int arr[] = new int[n];
    for (int i = 0; i < n; i++)
      arr[i] = sc.nextInt ();
    System.out.println (countEmployees (arr));
  }
}

PYTHON PROGRAM

def countEmployees(n,arr):
    dup_arr=arr[:]
    dup_arr.sort()
    count=0
    for i in range(n):
        if arr[i]!=dup_arr[i]:
            count+=1 
        else:
            pass
    return count
n=int(input())
arr=[ ]
for i in range(n):
    arr.append(int(input()))
print(countEmployees(n,arr))

C++ PROGRAM

#include<bits/stdc++.h>
using namespace std;

int countEmployees(int arr[], int n) {
    int temp[n];
    for (int i = 0; i < n; i++)
        temp[i] = arr[i];
    
    sort(arr, arr + n);
    
    int count = 0;
    for (int i = 0; i < n; i++) {
        if (arr[i] != temp[i])
            count++;
    }
    return count;
}

int main() {
    int n;
    cin >> n;
    int arr[n];
    
    for (int i = 0; i < n; i++)
        cin >> arr[i];
    
    cout << countEmployees(arr, n) << endl;
    
    return 0;
}

Question: Maximum Revenue

Problem Statement: Amit is a salesman who wishes to know the maximum revenue received from a given item of the N products each day . Amit has a sales record of N products for M days.Helo amit to find the highest revenue received each day.

Input :

• The first line of the input consists of two space-separated integers- day(M) and item(N) representing the days and the products in the sales record.
• The next M lines consist of N space separated integers representing the sales revenue from each product each day.

Output:

• Print m space-separated integers representing the maximum revenue received each day .

Example Input:

• 3 4
• 101 123 234 344
• 143  282 499 493
• 283 493 202 304

Output:

• 344 499 493

Explanation:

• The maximum revenue received on the first day is 344 , followed by a maximum revenue of 499 on the second day and a maximum revenue of 493 on the third day.

JAVA PROGRAM

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int m=sc.nextInt();
    int n=sc.nextInt();
    int arr[][]=new int[m][n];
    int i,j;
    for(i=0;i<m;i++){
        for (j=0;j<n;j++){
            arr[i][j]=sc.nextInt();
        }
    }
    for (i=0;i<m;i++){
        int max = Integer.MIN_VALUE;
        for(j=0;j<n;j++){
            if(arr[i][j]>max){
                max = arr[i][j];
            }
        }
        System.out.println(max);
    }
 }
}

PYTHON PROGRAM

m = int(input())
n = int(input())
arr = []
for i in range(0, m):
   ar = []
   for j in range(0, n):
       ar.append(int(input()))
   arr.append(ar)

for i in arr:
   print(max(i), end=" ")

C++ PROGRAM

#include <bits/stdc++.h>
using namespace std;

int main(){
    int m,n, i,j;
    cin >> m;
    cin >> n;
    int arr [m][n];
    for(i = 0;i < m;i++){
        for (j=0;j<n;j++){ 
            cin >> arr[i][j];
        }
    }
    for (i = 0;i < m;i++){
        int max = INT_MIN;
        for(j=0;j<n;j++){ 
            if(arr[i][j]>max){
                max = arr[i][j];
            }
        }
        cout  << max << " ";
    }
    return 0;
}

Question: Iron Magnet

Problem Statement  :

We know iron behaves like magnets when all the north and the south sides are placed accordingly in a balanced way while the north comes first and then the south. Now if you are given the distribution of the north and the south poles inside the iron metal piece, you have to say how many swaps is needed to turn it into an iron, if possible, otherwise print -1.

Input Format: A string consisting N and S as north and south poles.
Output Format:
An integer denoting the number of poles will be needed.

Sample Input:
SNNSN

Output:
3

Output Description:
After we balance the iron in the way NSNNSNSS, we will get a piece of metal that will be balanced as a magnet.

JAVA PROGRAM

s = input()
ans = 0
if s[0] != "N":
    ans += 1
    s = "N" + s
print(ans + abs(s.count("N") - s.count("S")))

PYTHON PROGRAM

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.next();
        int res = 0, j = 0;
        for (int i = 0; i < str.length(); i++) {
            if (str.charAt(i) == 'N')
                j++;
            else
                j--;
            if (j < 0) {
                j++;
                res++;
            }
        }
        res = res + j;
        System.out.println(res);
    }
}

C++ PROGRAM

#include<bits/stdc++.h>

using namespace std;

int main() {
    string s;
    int ans = 0, k = 0;
    cin >> s;
    for (auto i: s) {
        if (i == 'N') k++;
        else k--;
        if (k < 0) {
            k++;
            ans++;
        }
    }
    ans += k;
    cout << ans;
}

Darwinbox Coding Questions Round 2

Question: Death Note

Problem Statement : Ryuk, the Shinigami (God of death) had allowed Light Yagami, a school student, to kill as many people as he can by using a death note. But writing the names barely will allow other people to watch them. So he encrypts the names using digits, where a means 1, b means 2 and so on upto z is 26. Now if he gives numbers, there is a communication error because a number string can be decrypted by the death note in various ways and eventually killing them all. If everyone in the world has a unique name, for a given number, how many people can die?

NOTE THAT: There is every possible name in the world with the 26 letters, and capital or small letters is not a problem.

Input format:
A number stream denoting the first name’s encrypted version

Output Format:
Number of people dying by this.

Constraints:
1<=stream length<=10^8

Sample Input: 1267
Sample Output: 3
Output Specification:Two people of the name azg and lfg die.

PYTHON PROGRAM

def solve(s, n):
    if n == 0 or n == 1:
        return 1
    ans = 0
    if s[n - 1] > "0":
        ans = solve(s, n - 1)
    if s[n - 2] == "1" or (s[n - 2] == "2" and s[n - 1] < "7"):
        ans += solve(s, n - 2)
    return ans
s = input()
print(solve(s, len(s)))

C++ PROGRAM

#include <bits/stdc++.h>

using namespace std;
string s;
int ans;
void func(int i, int n) {
    if (i == n - 1 || i == n) {
        ans++;
        return;
    }

    if (s[i] == '1')
        func(i + 2, n);
    else if (s[i] == '2' && s[i + 1] < '7') func(i + 2, n); func(i + 1, n); } int main() { ans = 0; cin >> s;
    func(0, s.length());
    cout << ans;
}

JAVA PROGRAM

import java.util.*;
class Main {
    static String s;
    static int ans;
    public static void func(int i, int n) {
        if (i == n - 1 || i == n) {
            ans++;
            return;
        }
        if (s.charAt(i) == '1')
            func(i + 2, n);
        else if (s.charAt(i) == '2' && s.charAt(i + 1) < '7')
            func(i + 2, n);
        func(i + 1, n);

    }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        s = sc.next();
        func(0, s.length());
        System.out.println(ans);
    }
}

Questions: Seating Arrangement in Exam Hall

Problem Statement: Semester exams are going on for university students. Examiners noticed that a group of people are trying to cheat. They marked students of that group as ‘1’ and students of another group ( who are not cheating ) as ‘0’

We can reduce cheating by not allowing students from group 1 to sit together, means no two students from group 1 can sit together. Seatings are marked using above conditions. Your task is to give the seating placement of nth possibility Possibility order from 1 to 10 is given below

[1  10  100  101  1000  1001  1010  10000  10001  10010]

Sample input :

3 → number of test cases

4

6

9

Sample output :

101

1001

10001

Explanation :

4th possibility is 101

6th possibility is 1001

9th possibility is 10001

JAVA PROGRAM

import java.util.*;
class Main {
    public static void possibilities(int n) {
        int c = 0;
        String b = "";
        for (int i = 1; n != c; i++) {
            String s = Integer.toString(i, 2);
            if (!s.contains("11")) {
                c++;
                b = s;
            }
        }
        System.out.println(b);
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int tc = sc.nextInt();
        int[] a = new int[tc];
        for (int i = 0; i < tc; i++) {
            a[i] = sc.nextInt();
        }
        for (int i = 0; i < tc; i++) {
            possibilities(a[i]);
        }
    }
}

PYTHON PROGRAM

t = int(input())
a = []
m = -1
m1 = -1
for i in range(t):
    m1 = int(input())
    a.append(m1)
    m = max(m, m1)
k2 = 2
n = m + 1
k1 = ["0"] * (n)
k1[1] = "1"
a1 = 1
while k2 < (n): if k1[a1][-1] == "0": k1[k2] = k1[a1] + "0" k2 += 1 if k2 >= (n):
            break
        k1[k2] = k1[a1] + "1"
        k2 += 1
        if k2 >= (n):
            break
        a1 += 1
    elif k1[a1][-1] == "1":
        k1[k2] = k1[a1] + "0"
        k2 += 1
        if k2 >= (n):
            break
        a1 += 1
for i in a:
    print(k1[i])

C++ PROGRAM

#include<bits/stdc++.h>

using namespace std;

int main() {
    int n, m, Max = 0;
    cin >> n;
    vector < int > v(n);
    vector < string > arr;
    for (int i = 0; i < n; i++) { cin >> v[i];
        Max = max(Max, v[i]);
    }
    queue < string > q;
    q.push("1");
    int i = 1;
    arr.push_back("1");
    while (!q.empty()) { //cout<<"TEST"<<endl; string a = q.front(); q.pop(); q.push(a + "0"); arr.push_back(a + "0"); i++; if (a[a.length() - 1] == '0') { q.push(a + "1"); arr.push_back(a + "1"); i++; } if (i > Max) break;
    }
    for (int i = 0; i < n; i++) {
        cout << arr[v[i] - 1] << endl;
    }
}

 Questions: Minimum Occurrence (R->Medium)

Problem Statement: Given a sting , return the character that appears the minimum number of times in the string. The string will contain only ascii characters, from the ranges (“a”-”z”,”A”-”Z”,0-9), and case matters . If there is a tie in the minimum number of times a character appears in the string return the character that appears first in the string.

Input Format:
Single line with no space denoting the input string.

Output Format:
Single character denoting the least frequent character.

Constraints:
Length of string <=10^6

Sample Input:
cdadcda

Sample Output:
c

Explanation:
C and A both are with minimum frequency. So c is the answer because it comes first with less index.

JAVA PROGRAM

import java.util.*;
public class Main
{
  public static void main(String[] args)
{
   Scanner sc=new Scanner(System.in);
   String str=sc.next();
   char arr[]=str.toCharArray();
   int temp[]=new int[256];
    for(int i=0;i < arr.length;i++) { temp[arr[i]]++; } int min=Integer.MAX_VALUE; int index=0; for(int i=255;i >=  0;i--)
    {
       if(temp[i]==0)
        continue;
       min=Math.min(min,temp[i]);
      } 
    for(int i=0;i < arr.length;i++)
   {
       if(min==temp[arr[i]])
     {
        System.out.println(arr[i]);  
        break;
     }
  }
}
}

PYTHON PROGRAM

s=input()
ans=[]
for i in s:
    ans.append(s.count(i))
print(s[ans.index(min(ans))])

C++ PROGRAM

#include <bits/stdc++.h>
using namespace std;
unordered_map < char,int > F;

int main()
{
    string s;
    int m=INT_MAX;
    cin >> s;
    for(auto i:s) F[i]++;
    for(auto i:F) m=min(m,i.second);
    for(auto i:s)
        if(F[i]==m)
            {
                cout << i;
                break;
            }
}

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