TVS Placement Paper -: Programming Questions And Answers

TVS Previous Years Solved Sample Placement Papers

1. Select the query which allows you to select rownum and employee name (empname) from a record(emp)?

   A: select rownum, enum from emp;

   B: select colnum, ename from emp;

   C: select colname, enum from emp;

   D: select rownum, ename from emp;

   Ans: D

2. What does a one-to-one relationship indicate?

   A: More entities are needed.

   B: The model should be denormalized.

   C: The tables are not properly indexed.

   D: The model cannot be implemented physically.

   Ans: B

3. What clause do you use in the query to help avoid a table scan?

   A: GROUP BY clause

   B: HAVING clause

   C: FROM clause

   D: WHERE clause

   Ans: D

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

   using System;
   
   namespace MyApplication {
     class Program {
       static void Main(string[] args) {
         bool x = true;
         Console.Write(Convert.ToString(x));
       }
     }
   }
       

   A: True

   B: true

   C: False

   D: false

   Ans: A) True

   Explanation: In the above C# code, we are using Convert.ToString() method which converts a bool to string. Thus, the output will be "True".

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

   using System;
   
   namespace MyApplication {
     class Program {
       static void Main(string[] args) {
         double x = 10.25;
         Console.Write(Convert.ToInt32(x));
       }
     }
   }
       

   A: 10.30

   B: 10.25

   C: 10

   D: Error

   Ans: C) 10

   Explanation: In the above C# code, we are using Convert.ToInt32() method which converts a double to int. Thus, the output will be "10".

6. What is 'Console' in C#?

   A: Class

   B: Object

   C: Method

   D: Structure

   Ans: A) Class

   Explanation: In C#, the Console class is used to represent the standard input, output, and error streams for console applications.

7. What will be the output of the following C# code, if the input is 123?

   using System;
   
   namespace MyApplication {
     class Program {
       static void Main(string[] args) {
         Console.WriteLine("Enter a number:");
         int num = Console.ReadLine();
         Console.WriteLine("Given number is: " + num);
       }
     }
   }
       

   A: Given number is:123

   B: Given number is: 123

   C: Given number is: "123"

   D: Error

   Ans: D) Error

   Explanation: In C#, Console.ReadLine() is used to read a string. Here, we are trying to assign the input to an int variable directly, which causes an error. The error is: Cannot implicitly convert type 'string' to 'int'.

8. What will be the output of the following C# code, if the input is 123?

   using System;
   
   namespace MyApplication {
     class Program {
       static void Main(string[] args) {
         Console.WriteLine("Enter a number:");
         int num = Convert.ToInt32(Console.ReadLine());
         Console.WriteLine("Given number is: " + num);
       }
     }
   }
       

   A: Given number is:123

   B: Given number is: 123

   C: Given number is: "123"

   D: Error

   Ans: B) Given number is: 123

   Explanation: In C#, Console.ReadLine() reads input as a string. Using Convert.ToInt32(), we convert the input to an int, so there is no error. Output will be: Given number is: 123.

9. Which is/are the correct method(s) to input a float value in C#?

   A: Parse(Console.ReadLine())

   B: ToSingle(Console.ReadLine())

   C: ToFloat(Console.ReadLine())

   D: Both A and B

   E: Both A and C

   Ans: D) Both A and B

   Explanation: In C#, the following methods can be used to input a float value:

   • float.Parse(Console.ReadLine()): Parses a string to a float.
   • Convert.ToSingle(Console.ReadLine()): Converts a string to a single-precision floating-point number.

   ToFloat(Console.ReadLine()) is not a valid method in C#.

10. What is the output of the program?

    void main()
    {
      int const *p = 5;
      cout << ++(*p);
    }

    A: 5

    B: Memory value

    C: Compiler error

    D: Garbage value

    Ans: [Your Answer]

11. What is the output of the program?

    main()
    {
      char s[] = "man";
      int i;
      for(i = 0; s[i]; i++)
        cout << s[i];
    }

    A: mmmm aaaa nnnn

    B: man

    C: Compiler error

    D: None of the above

    Ans: [Your Answer]

12. What is the output of the program?

    main()
    {
      float me = 1.1;
      double you = 1.1;
      if(me == you)
        cout << "I love U";
      else
        cout << "I hate U";
    }

    A: I hate U

    B: I love U

    C: Garbage value

    D: None of the above

    Ans: [Your Answer]

13. C# is a programming language, developed by ___.

    A: Oracle

    B: Microsoft

    C: GNU project

    D: Google

    Ans: B

14. C# runs on the ___.

    A: .NET Framework

    B: Java Virtual Machine

    C: Both A and B

    D: None of the above

    Ans: A

15. C# programming language is used to develop:

    A: Web apps

    B: Desktop apps

    C: Mobile apps

    D: All of the above

    Ans: D

16. Is C# an object-oriented programming language?

    A: Yes

    B: No

    Ans: A

17. Select the query through which you can display the records within a given range?

    A: select row from emp where rowname <=&rangeend

    B: select row from emp where rowname <&rangeend

    C: select column from emp where rowname &rangeend

    D: select column from emp where rowname <=&rangeend

    Ans: A