Java Basics

Java 1

100

What is the ASCII value of 'A'?

65

200

What is the ASCII value for '0'?

48

300

What is the ASCII value for 'a'?

97

400

What error occurs when your code asks a computer to do something it can not reliably do?

Runtime error

500

Which error occurs when your syntax is incorrect?

Compile error

Java 2

100

Recite the Java main method

public static void main (String [] args)

200

List the 8 primitive data types

byte, short, int, long, float, double, char, boolean

300

What is instantiation?

creating one instance of an object

400

What is Integer.MIN-VALUE?

-2^31

500

Which scanner method reads in a single word?

next();

Bases

100

Convert 25 from decimal to binary

11001

200

Convert 101001 from binary to decimal.

41

300

Convert A5 from base 16 to decimal

165

400

Convert 10100111 from base 2 to hexadecimal.

A7

500

Convert 69420 from decimal to base 31.

2A7B

Coding 1

100

What is the escape sequence for a new line?

\n

200

What is the escape sequence for a backslash?

\\

300

Write a code that prints a blank line.

System.out.println();

400

int a = 6;

char b = '2'

What is a+b?

56

500

int a = 6;

double b = 2;

What is a+b?

8.0

Coding 2

100

What is the difference between print() and println()?

println() moves to the next line after printing

200

A java file name is always the same as the name of the what?

Class

300

boolean a = true;

String b = "that";

What is a+b?

"truethat"

400

int a = 6;

boolean b = false;

What is a+b?

error

500

int a = 6;

String b = '2';

What is a+b?

62