Google Interview Question for Software Engineers

Country: United States

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boolean hasFactorKSubArray(int[] arr, int k) {
        for(int i = 1; i < arr.length; i++) {
            arr[i] += arr[i - 1]; //becomes a prefix sum array of arr (can be recovered if necessary)
        for(int hi = arr.length - 1; hi >= 1; hi-- ) {
            for(int lo = 0; lo <= hi - 1; lo++) {
                if((arr[hi] - lo == 0 ? 0: arr[lo - 1]) % k == 0) {
                    return true;
        return false;

- aonecoding January 13, 2018 | Flag Reply
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of 0 vote

package findSubArray;
import java.util.*;

public class findSubArray {

public static int findsubArray(int arr[], int k) {
int n = arr.length, i, j;
int array[][] = new int[n][n];
for(i=0;i<n;i++) {
array[0][i] = arr[i];
for(i=0;i<n;i++) {
array[i][0] = arr[0];
for(i=1; i<n; i++) {
for(j=i;j<n;j++) {
array[i][j] = arr[j] * array[i-1][j-1];
System.out.println("i: "+i+" j: "+j+" arr[i-1][j-1]: "+array[i-1][j-1]+" arr[i][j]: "+array[i][j]);
if(array[i][j] % k ==0) {
if(i != 0) {
System.out.println("End of subarray is: "+arr[j]);
return i+1;
return 0;

public static void main(String[] args) {
// TODO Auto-generated method stub
int array[] = {1, 9, 16, 5, 4, 3, 2};
int k = 720;
int answer = findsubArray(array, k);
System.out.println("Minimum lenth of subarray is: "+answer);


- Varsha Jayaraman January 13, 2018 | Flag Reply

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