Saturday Academy CP 101 Jeopardy

Variables

100

What are the two categories of variables?

Primitive and non-primitive

200

Name a non-primitive variable

Strings

300

If the sky is blue, and Sona is mute, name three of the eight primitive variables

boolean, byte, char, short, int, long, float, double (any 3)

400

What is the proper format for declaring and initializing a variable?

[variable type] [variable name] = [value];

500

What are the requirements for a valid variable name?

First character must be lowercase letter, no spaces, Camel Case (optional)

Operations

100

What does 5 % 2 equal?

1

200

Given a = 3 and b = 5

If a += b;

what does System.out.println(a); return?

8

300

Given a = 1; b = 4; and c = 10;

If a+=b; c-=a;

What does System.out.println(c);

5

400

Given num1 += num2, num1 += num3

What is equivalent to?

num1 = num1 + num2 + num3

500

What is (100 % 6) % 2 equal to?

0

Strings & Index

100

What is a String and is it a primitive data type?

A sequence of characters; NOT a primitive data type

200

What is one way to declare a string that says: Welcome to Coding Power?

String way1= "Welcome to Coding Power";

String way2= new String ("Welcome to Coding Power");

300

What is "This is our final class!".length()?

24

400

What is str.length() - the index of the last character?

1

500

String str = "Jeopardy";

for(int i = str.length()-1;i >= 0;i--)  System.out.print(str.substring(i,i+1);

What does this do?

ydrapoeJ

Logic

100

true && false

false

200

Given: x = 10;

if (x%2 ==0) return true;  

else return false;

true

300

(true || false) && (true && true)

true

400

for(int i = 10; i>0; i--){ System.out.print(i);}

10987654321

500

int count = 0;

for(int i = 0 ; i<5; i++){

System.out.print("no");

count++; }

nonononono

Methods Definitions

100

What is a main method?

A special method that successfully runs your other methods

200

What is the correct way to call a method?

myMethod()

300

What does a return type do?

Extra Credit (200 points): List 5 return types.

Indicates what will be returned after a method is ran.

EC: int, double, boolean, String, void (also long, float, byte, char, short)

400

What is the structure of the method header?

Access modifier, return type, method name (parameters)

500

What is the proper main method header?

public static void main(String [] args)