Google Interview Question for Backend Developers

Country: United States

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of 0 vote

import java.util.ArrayList;
import java.util.List;

public class MistakenNumbers {
    public List<Integer> getNum(int num) {
         * 23, 32,
         * 81, 18
         * 234, 432
        List<Integer> mistaken = new ArrayList<Integer>();
        if (num <= 11) {
            return mistaken;
        for (int i=12; i <=num ; i++) {
            int flippedNumber = this.flippedNumber(i);
            if (i % 10 != 0 && flippedNumber != i) {
        return mistaken;
    private int flippedNumber(int number) {
        String currentNumber = String.valueOf(number);
        StringBuffer flippedString = new StringBuffer();
        for (int i= currentNumber.length()-1 ; i >= 0 ;i--) {

        return Integer.valueOf(flippedString.toString());
    public static void main(String[] args) {
        MistakenNumbers numbers = new MistakenNumbers();
        List<Integer> mistaken = numbers.getNum(100);
        System.out.println("running mistaken number");
        for (int n : mistaken) {

- ethioer January 24, 2018 | Flag Reply

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