C#

Question 1

When should you use a decimal type?

Answer 1

Anything representing base 10 numbers - eg Currency

Question 2

When should you use a double type?

Answer 2

Always use double unless you need the base 10 accuracy that decimal offers (eg Currency).

Question 3

static properties are per ?????? not per ??????

Answer 3

Static properties are per OBJECT not per INSTANCE

Therefore if a static property is changed in one instance, it will change across every instance of that object

Question 4

A ?????? property allows instances of the same object to share data

Answer 4

A STATIC property allows instances of the same object to share data

Question 5

What is the format of a double?

Answer 5

double d = 1D;

Question 6

What is the format of a decimal?

Answer 6

decimal d = 1.0M;

Question 7

What is the value of a?

x = 8;

y = 4;

z = 2;

a = x / y / z;

Answer 7

a = 1

Question 8

What is the ?? operator used for?

Answer 8

Similar to Nz in VB, the ?? operator returns the left-hand operand if it is not null, or else it returns the right operand.

eg

int? x = null;

y = x ?? 2;

y will be equal to 2

Question 9

Use an array to split the following string into sections:

string input = “1 3 5 7”;

Answer 9

string[] values = input.Split(‘ ‘);