Skilrock Technologies Interview Questions

1.Write a Program to find the frequency of a number in a two-dimesnsional array?

 import java.util.Scanner;  
 class FindFrequency {  
   public static void main(String args[]) {  
     Scanner sc = new Scanner(System.in);  
     int value[] = {  
       0, 1, 2, 3, 4, 5, 6, 7, 8, 9  
     };  
     int flag[] = new int[10];  
     System.out.println("Enter the value of n:");  
     int n = sc.nextInt();  
     int arr[][] = new int[n][n];  
     for (int i = 0; i < n; i++) {  
       for (int j = 0; j < n; j++) {  
         arr[i][j] = sc.nextInt();  
       }  
     }  
     for (int i = 0; i < n; i++) {  
       for (int j = 0; j < n; j++) {  
         Inner: for (int k = 0; k < 10; k++) {  
           if (arr[i][j] == value[k]) {  
             flag[k]++;  
             break Inner;  
           }  
         }  
       }  
     }  
     for (int k = 0; k < 10; k++)  
       System.out.println("value of" + k + "is" + flag[k]);  
   }  
 }  

2.Write a Program to find the sum of diagonal elements using one variable?

 import java.util.Scanner;  
 class Sum {  
   public static void main(String args[]) {  
     Scanner sc = new Scanner(System.in);  
     int n = sc.nextInt();  
     int arr[][] = new int[n][n];  
     for (int i = 0; i < n; i++) {  
       for (int j = 0; j < n; j++) {  
         arr[i][j] = sc.nextInt();  
       }  
     }  
     int sum = 0;  
     for (int i = 0; i < n; i++) {  
       sum = sum + arr[i][i];  
     }  
     System.out.println(sum);  
   }  
 }  

3.Tell me about your project?
   This Question is asked in each Technical Interview.Prepare these question self:-
    A.Disadvantage of old System.
    B.Advantage of new System.
    C.Requirement Specification.
    D.Process implemented in project
    E.Tables Used(Database).

4.Other Questions:-
   A:-Sudoku
   B:-bugs in any Real world applications like Facebook/Whatsapp
   C:-Second Highest salary (SQL Query)
   D:-Merging of Two binary Search tree
   E:-Manipulation of Strings(like remove kth character from a String)
 
All The Best Guys!
Keep Calm & NeverGiveUp

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