Week 3

Question 1

How do you get pi?

Answer 1

Math.PI;

Question 2

What namespace does the Math class use?

Answer 2

using System;

Question 3

How do call a cosine function?

Answer 3

Math.Cos(x);

Question 4

What namespace does BigInteger need?

Answer 4

using System.Numerics;

Question 5

Definition of static checking:

Answer 5

bug found automatically before program even runs.

Question 6

Definition of Dynamic checking:

Answer 6

bug found automatically during runtime

Question 7

No checking

Answer 7

The complier won’t find the error you have to. Code probably won’t run correctly.

Question 8

What types of errors can static checking find.

Answer 8

Syntax errors, wrong names, wrong number of arguments, wrong argument types, wrong return types

Question 9

What type of errors can dynamic checking catch?

Answer 9

illegal argument values, unrepresentable return values, out-of-range indexes, calling a method on a null object reference.

Question 10

What does the “readonly” keyword do?

Answer 10

readonly indicates that a field can only be assigned at the time of declaration or in a constructor of that class.

Question 11

What does the const keyword do?

Answer 11

declares a constant local or a constant field (only initialized at its declaration, and cannot be changed after)