Zenoti SDE-1 Interview Experience (2024)

Zenoti SDE-1 Interview Experience (2024)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.*;

public class Zenoti {

/*Zenoti dotnet software engineer*/

/*Online test : Status pass*/

public static void main1(String args[] ) throws Exception {
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
while(n > 0){
String str=sc.next();
Map<Character,Integer> fhMap=new LinkedHashMap<>();

for(char ch : str.toCharArray()){
fhMap.put(ch, fhMap.getOrDefault(ch,0)+1);
}

StringBuilder sb=new StringBuilder();
for(char ch : fhMap.keySet()){
sb.append(ch);
sb.append(fhMap.get(ch));
}
System.out.println(sb);
n–;
}

}

public static void main2(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
PrintWriter wr = new PrintWriter(System.out);
String S = br.readLine();

String[] out_ = tokenize_string(S);
for (int i_out_ = 0; i_out_ < out_.length; i_out_++)
{
System.out.println(out_[i_out_]);
}

wr.close();
br.close();
}
static String[] tokenize_string(String S){
char[] chr= S.toCharArray();
int f=-1;
List<String> str=new ArrayList<>();
StringBuilder sb=new StringBuilder();
for(int i=0;i<chr.length;i++){

if(chr[i]==’ ‘ && f==-1) {
str.add(sb.toString());
sb=new StringBuilder();
}

if(f!=-1 && chr[i]=='”‘){
sb.append(chr[i]);
str.add(sb.toString());
sb=new StringBuilder();
f=-1;
continue;
}

if(chr[i]=='”‘){
f=i;
}
sb.append(chr[i]);
}

String[] ans=new String[str.size()];
for(int i=0;i<str.size();i++){
ans[i]=str.get(i).trim();
}

return ans;
}

public static void main3(String args[] ) throws Exception {
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
while(n>0){
String str=sc.next();
StringBuilder sb=new StringBuilder();

for(char ch : str.toCharArray()){
if(ch >=65 && ch <=90){
if(sb.length()!=0) sb.append(‘_’);
sb.append((char) (ch+32));
}else{
sb.append(ch);
}
}

System.out.println(sb.toString());
n–;
}
}

/*[19/04/2024] Interview questions on hacker earth : status pass*/

/**
* 1
* 1 2 1
* 1 2 3 2 1
* 1 2 3 4 2 3 1
*/

/*Time : O(N^2) Space :O(1)*/
public static void printPattern(int n) {
for(int i=0;i<=n;i++) {
int k=n-i;
while(k–>0) System.out.print(” “);
for (int j = 1; j <= i; j++) System.out.print(j +” “);
for (int j = i-1; j >0; j–) System.out.print(j +” “);
System.out.println();
}
}

/*Time :O(2^n) Space :O(1) + (call stack space)*/
public int fib(int n ){
if(n<2) return 1;
return fib(n-1)+fib(n-2);
}

/*Time :O(n) Space :O(1) + (call stack space)*/
public int fibMemo(int n, Map<Integer,Integer> memo){
if(n<2) return 1;
if(memo.containsKey(n)) return memo.get(n);
memo.put(n, fib(n-1)+fib(n-2));
return memo.get(n);
}

/*Time : O(n) Space :O(n)*/
public int fibTab(int n){
if(n<2) return 1;
int[] dp =new int[n+1];
for(int i=2;i<n;i++) dp[i]=dp[i-1]+dp[i-2];
return dp[n];
}

/*
* given three tables, we need to query certain data on the tables;
*
* Select students.name from students_table where id in (
* select students_id in attendance_table left join
* lecture_table on attendance_table.lecture_id =lecture_table
* )
* order by students.name
* */

/* [22/04/2024] :Interview on hacker earth*/
public static void sortWords(String paragraph){
String[] words=paragraph.split(” “);
Arrays.sort(words);
System.out.println(Arrays.toString(words));
}

/*[24/04/2024] : Interview on hacker earth*/
public void findFirstTwoMax(int[] arr){

/*constraints: without sorting array, without using extra loops */
int fMax=Integer.MIN_VALUE, sMax=Integer.MIN_VALUE;

for(int i: arr){
if(i>fMax){
sMax=fMax;
fMax=i;
}else sMax=Math.max(sMax,i);
}
System.out.println(fMax +” , “+sMax);
}
public boolean isAnagram(String s, String t){
int[] asciiArr=new int[256];

/*constraints: without using extra loops & extra hashmaps*/
if(s.length()!=t.length()) return false;

for(int i=0; i<s.length(); i++) {
asciiArr[s.charAt(i)]++;
asciiArr[t.charAt(i)]–;
}

for(int i:asciiArr)
if(i>0) return false;

return true;
}

/*sql*/
}

result : not selected

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