C# :: Exception Handling and Lists

Exceptions

100

What will this do?

String s = "b";

int.Parse(s);

Throw an exception

200

What will this do?

StreamReader sr = new StreamReader("c:\does_not_exist.txt");

Throw a FileNotFoundException

300

What will this do?

int x = 5 / 0;

It will compile (it'll throw an exception at runtime).

400

What will this do?

try

{

  Console.WriteLine("hi there");

} catch(Exception e)

{

  Console.WriteLine("ERROR");

}

hi there

500

What will this do?

        static void ThrowsAnException()
        {
            int zero = 0;
            int y = 3 / zero;
            Console.WriteLine("I just tried to divide by zero");
        }

        static void Main(string[] args)
        {
            try
            {
                ThrowsAnException();
            }
            catch(DivideByZeroException e)
            {
                Console.WriteLine("ERROR: You tried to divide by zero");
            }
        }

ERROR: You tried to divide by zero

Lists

100

How do I create a new List of int's?

List<int> listOfInts = new List<int>();

200

How do I get this List's size?

List<String> someList = new List<String>();

someList.Count

300

Create a List of String's and put the first names of your team mates in it.

List<String> teamList = new List<String>();


teamList.Add("example1");

teamList.Add("example2");

400

What will the following code do?

List<int> listOfInts = new List<int>();

int firstInt = listOfInts[1];

It will compile, but throw a ArgumentOutOfRangeException at runtime.

500

Will will this do?

            List<int> listOfInts = new List<int>();
            listOfInts.Add(3);
            listOfInts.Add(2);
            listOfInts.Add(1);
            foreach(int i in listOfInts)
            {
                Console.WriteLine(i);
            }

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