C# Questions & Answers on Rounding Functions for Freshers

1. Which among the given classes provides types of rounding functions?

a) Math
b) Process
c) System
d) Object

Answer: a

2. Which of these methods is a rounding function of Math class?

a) Max()
b) Min()
c) Abs()
d) Round()

Answer: d

Explanation: Round() rounds up a variable to nearest integer

3. Which of these classes contains only floating point functions?

a) Math
b) Process
c) System
d) Object

Answer: a

Explanation: Math class contains all the floating point functions that are used for general purpose mathematics methods. Example : sin(), cos(), exp(), sqrt() etc.

4. Which of these method returns a smallest whole number greater than or equal to variable X?

a) double Ciel(double X)
b) double Floor(double X)
c) double Max(double X)
d) double Min(double X)

Answer: a

Explanation: Ciel(double X) returns the smallest whole number greater than or equal to variable X.

5. Which of these methods return a largest whole number less than or equal to variable X?

a) double Ciel(double X)
b) double Floor(double X)
c) double Max(double X)
d) double Min(double X)

Answer: b

Explanation: double Floor(double X) returns a largest whole number less than or equal to variable X.

6. Which of the following functions return absolute value of a variable?

a) Abs()
b) Absolute()
c) absolutevariable()
d) None of the mentioned

Answer: a

Explanation: Abs() returns the absolute value of a variable

7. What will be the output of the given code snippet?

1.  public class A

2.  {

3.      public int x;

4.      public int y;

5.      public void display() 

6.      {

7.          Console.WriteLine(x + " " + y);

8.      }

9.  }

10.  class Program

11.  {

12.      static void Main(string[] args)

13.      {

14.          A obj1 = new A();

15.          A obj2 = new A();

16.          obj1.x = 1;

17.          obj1.y = 2;

18.          obj2 = obj1;

19.          obj1.display();

20.          obj2.display();

21.      }

22.  }

a) 1 2 0 0
b) 1 2 1 2
c) 0 0 0 0
d) Run time exception

Answer: b

Output: 1 2 1 2

8. What will be the output of the given code snippet?

1. class Program

2. {

3.     static void Main(string[] args)

4.     {

5.         double x = 3.14;  

6.         int y = (int) Math.Abs(x);

7.         Console.WriteLine(y);

8.     }

9. }

a) 0
b) 3
c) 3.0
d) 3.1

Answer: b

Output: 3

9. What will be the output of the given code snippet?

1. class Program

2. {

3.     static void Main(string[] args)

4.     {

5.         double x = 3.14;  

6.         int y = (int) Math.Ceiling(x);

7.         Console.WriteLine(y);

8.     }

9. }

a) 0
b) 3
c) 3.0
d) 4

Answer: d

Explanation: Ceiling(double x) returns the smallest whole number greater than or equal to variable x.
Output: 4

10. What will be the output of the given code snippet?

1. class Program

2. {

3.     static void Main(string[] args)

4.     {

5.         double x = 3.14;  

6.         int y = (int) Math.Floor(x);

7.         Console.WriteLine(y);

8.     }

9. }

a) 0
b) 3
c) 3.0
d) 4

Answer: b

Explanation: double Floor(double X) returns the largest whole number less than or equal to variable X. Here, the smallest whole number less than 3.14 is 3.
Output: 3