TATA ELXSI Previous Years Solved Sample Placement Papers

1. What will be the output of the following C# code?

   using System;
   
   namespace MyApplication {
     class Program {
       static void Main(string[] args) {
         string[] mobiles = {"iPhone", "Samsung", "Vivo"};
         Console.WriteLine(mobiles[0] + mobiles[2]);
       }
     }
   }
       

   A: iPhoneVivo

   B: iPhone+Vivo

   C: Exception

   D: iPhone Vivo

   Ans: A

   Explanation:

   The statement mobiles[0] + mobiles[2] concatenates the 0th and 2nd elements, resulting in "iPhoneVivo".

2. Which array method is used to sort an array alphabetically or in ascending order in C#?

   A: sort()

   B: sorting()

   C: Sort()

   D: Sorting()

   Ans: C

   Explanation:

   The Sort() method is used to sort an array alphabetically or in ascending order in C#.

3. What will be the output of the following C# code?

   using System;
   
   namespace MyApplication {
     class Program {
       static void Main(string[] args) {
         int[,] ARR = {{1,2},{3,4}};
         Console.WriteLine(ARR.GetLength(0) + "," + ARR.GetLength(1));
       }
     }
   }
       

   A: 4,4

   B: 2,2

   C: Compilation Error

   D: Runtime Error

   Ans: B

   Explanation:

   The code prints the dimensions of the 2D array. The first dimension (rows) and the second dimension (columns) both have lengths of 2, so the output is 2,2.

4. Which is the correct syntax to declare an array with 2 rows and 3 columns in C#?

   A: int arr[2][3] = new int[2][3];

   B: int arr[2,3] = new int[2,3];

   C: int[,] arr = new int[2,3];

   D: int [,]arr = new [2,3]int;

   Ans: C

   Explanation:

   The correct way to declare an array with 2 rows and 3 columns in C# is:

   int[,] arr = new int[2,3];

5. To declare an array, define the variable type with ___.

   A: Square brackets []

   B: Curly brackets {}

   C: Round brackets ()

   D: None of the above

   Ans: A

   Explanation:

   To declare an array, define the variable type with square brackets [].

6. Which C# keyword is used to coming out from the loop?

   A: break

   B: continue

   C: Both A and B

   D: None of the above

   Ans: A

   Explanation:

   The C# break keyword breaks the execution of the loop and sends the program’s control to the next statement written after the loop.

7. Which is the correct method to convert given string in uppercase?

   A: Upper()

   B: ToUpper()

   C: Upr()

   D: ToUpr()

   Ans: B

   Explanation:

   The ToUpper() method is used to convert the given string into the uppercase.

   using System;
   
   class Program {
     public static void Main() {
       string str = "includehelp";
       Console.WriteLine(str.ToUpper());
     }
   }
       

8. What is String.Length in C#?

   A: Property

   B: Method

   C: Constructor

   D: Both A and B

   Ans: A

   Explanation:

   The String.Length is a property of System.String class that is used to get the number of characters in the current String object.

9. What will be the output of the following C# code?

   using System;
   
   class Program {
     static void Main(string[] args) {
       String s1 = "Hello";
       String s2 = "IncludeHelp";
       String s3 = s1;
       Console.WriteLine(s1.Equals(s3) + "  " + s2.CompareTo(s1));
     }
   }
       

   A: Error

   B: True True

   C: True False

   D: True 1

   Ans: D

   Explanation:

   The Equals() method returns a bool value. We assigned s1 to s3. Thus, the statement s1.Equals(s3) will return "True". The CompareTo() method returns an int value, and s2.CompareTo(s1) will return 1 because this instance (s2) follows s1.

10. What will be the output of the following C# code?

    using System;
    
    class Program {
      static void Main(string[] args) {
        String str = "Hello";
        Console.WriteLine(str.Length);
      }
    }
        

    A: 5

    B: 6

    C: 7

    D: 4

    Ans: A

    Explanation:

    The String.Length returns the length of the string. Thus, the output will be 5.