C# Jeopardy - Basic!

Methods

100

What does void mean?

Void means the method doesn't return anything.

200

static void printMe(int i)
{
Console.WriteLine(i);
}

/*********************/
printMe(1);
printMe(2);

1 2

300

static void printMe(int i)
{
Console.WriteLine(i);
}

/*********************/
int i = 0;
printMe(i);
i = 5;
printMe(5);

0 5

400

static void printMe(int i)
{
Console.WriteLine(i);
}

/*********************/
int n = 37;
++n;
printMe(n);

38

500

static int Sum(int n1, int n2)
{
return n1 + n2;
}

/*************************/
int x = Sum(2, 3) + Sum(1, 2);
Console.WriteLine(x);

8

Input/Output

100

String line = "Look at me, I can write C# code!";
Console.WriteLine(line.ToUpper());

LOOK AT ME, I CAN WRITE C# CODE!

200

What method reads input from a user?

Console.ReadLine(),
Console.ReadKey()

300

What type do you use to read a text file?

StreamReader

400

Imagine numbers.txt contains:
37
25
-2
54

What does the following code print out?

StreamReader sr = new StreamReader("numbers.txt");
while(sr.EndOfStream == false)
{
Console.WriteLine( sr.ReadLine() );
}

37 25 -2 54

500

Imagine numbers.txt contains:
2
5
0
-5
-2

What does the following code print out?

int sum = 0;
StreamReader sr = new StreamReader("numbers.txt");
while(sr.EndOfStream == false)
{
sum += int.Parse( sr.ReadLine() );
}
Console.WriteLine(sum);

0

Loops

100

Name at least three different kinds of loops.

for
while
do-while

200

boolean ShouldContinue = true;
while(ShouldContinue)
{
ShouldContinue = false;
Console.WriteLine("hi!");
}

hi!

300

int i = 0;
do
{
Console.WriteLine(i);
++i;
} while(i < 3);

0
1
2

400

int i = 3;
do
{
Console.WriteLine(i);
--i;
} while(i > 0);

3
2
1

500

for(int i = 0 ; i < 5; ++i)
{
Console.WriteLine(i + 1 * 2);
}

2 3 4 5 6

Conditionals

100

int i = 0;
if(i >= 0)
{
Console.WriteLine(i);
}

0

200

int n = 6;
if(isDivisibleBy2(n))
{
Console.WriteLine("divisible by 2");
}
else if(isDivisibleBy3(n))
{
Console.WriteLine("divisible by 3");
}

divisible by 2

300

String movie = "Sleepy Hollow";
if(movie.Equals("sleepy hollow"))
{
Console.WriteLine("found it");
}

This space has been intentionally left blank.

400

String movie = "Terminator";
if(movie.Equals("Terminator") && movie.Contains("Term"))
{
Console.WriteLine("found it");
}

found it

500

String movie = "Lord of the Rings";
String userMovie = "lord";
if(movie.ToLower().Equals(userMovie))
{
Console.WriteLine("case 1");
}
else if(movie.Equals(userMovie))
{
Console.WriteLine("case 2");
}
else
{
Console.WriteLine("else");
}

else

General

100

int, double, char, String, etc. are examples of what?

types

200

What are the things between the parentheses called?
static int Sum(int n1, int n2)

arguments or parameters to a method

300

Console, StreamReader, String, are what?

Classes

400

What are lines of code that begin with // called?

e.g.,
// what are these called?

comments

500

What's the difference between running with and without a debugger?

If you run without a debugger, breakpoints are ignored.