Quiz on String Conversion and Parsing

What method can be used to convert a string to a numeric data type?

• You can directly cast from a string to a number

• Parse()

• Convert()

• ToNumber()

What is the result of the following code? string myString = "one"; int myInt = int.Parse(myString);

• This code will cause an error in the program

• The value in myInt will be 1

• The value in myString will be 1

• The value in myInt will be 0

Which answer correctly describes a difference between Parse() and ToString()?

• Parse() convert strings to numbers and ToString() converts numbers to strings.

• Parse() only works on integers and ToString() only works on floating point data types

• ToString() may throw an exception while Parse() will always work.

• Parse() is best at converting small numbers and ToString() is best at converting large numbers.

What is the result of the following code? String data = "A"; char value = char.Parse(data);

• The value variable will hold the A character

• The value variable will hold an empty string

• This code will cause a compile-time error

• This code will cause a run-time StringFormat exception

What value is stored in myString when the following code is run? bool mystery = true; String text = mystery.ToString();

• True

• False

• 1

• 0

What value is stored in myString when the following code is run? double value = 0.10; string myString = value.ToString("P");

• 10.00 %

• 0.10

• 100

• .001 %

What value is stored in the result when the following code is run? String input = "3.14159"; int result = int.Parse(input);

• An exception will be thrown at runtime

• 3.14159

• 3.14

• PI

What value is stored in myString when the following code is run? int myNumber = 20; String myString = myNumber.ToString("D3");

• 020

• 20

• 0

• 20.00

Which of the following statements will round the value stored in X and return the nearest whole number?

• int result = Math.Round(X);

• int result = Round(X);

• int result = Math.Floor(X);

• int result = Math.Ceiling(X);

The area of a circle is calculated as the mathematical value "PI" times the radius-squared. Which of the following statements correctly uses the Math class to get the value of PI?

• double area = Math.PI * radius * radius;

• double area = PI * radius * radius;

• double area = Math.PIO * radius * radius;

• double area = Math.Get("PI") * radius * radius;