CSA Unit 1

Variables & Data Types

100

A name associated with a memory location in the computer where a value is stored

What is a variable?

200

The word that is added in front of a declared variable type if its value cannot be changed once it is initialized

What is final used for?

300

The 3 primitive types of variables that are tested on the CSA exam.

What are:

int (integers)

double (decimal)

boolean (true/false)

400

Symbol that sets the value in the memory location of the variable on the left to copy the value on the right.

What is an = sign?

500

Rules for naming variables in Java.  (List 3)

Start with an alphabetical character (lower case)

all one word (no spaces)

can use letters, numbers, & ____

can't use reserved words

name should describe the data variable

don't put inside ""

case and letter sensitive

camelCase

Assignment Statements & Math Operations

100

An example of how you increment the variable count by 1.

What is

count = count +1  ?

200

The modulo operator is used to find the...

What is the % symbol used for remainder

300

To test if 2 items are equal.

What is ==

400

Used to initialize or change the value stored in a variable (use =, read as "gets the value of")

What is an assignment statement?

500

Error message for attempting to divide by 0.

What is the ArithmeticException? 

Compound Assignment Operators

100

Technique used to simulate a dry run through the code line by line.

What is code tracing? 

200

x-- is a shortcut for this compound math operator.

What is x-=1  or x = x-1

300

Shortcut that do a math operation & assignment in one step.

What is a compound assignment operator?

400

int x = 0;

int y = 5;

int z = 1;

x++;

y -= 3;

z = x + z;

x = y * z;

y %= 2;

z--;

System.out.println(“x = “ + x);

System.out.println(“y = “ + y);

System.out.println(“z = “ + z);

What is x=4, y=0, z=1

500

int a = 7;

int b = 2;

int c = a - b;

a = a - 6;

b++;

c = c--;

System.out.println(“a = “ + a);

System.out.println(“b = “ + b);

System.out.println(“c = “ + c);

What is a=1, b=3, c=4

Casting

100

Convert variable values to a different type.

What is type casting?

200

2 ways to get a double result when doing division in Java

Use at least one double in the operation

cast one of the int using (double)

300

attempting to store a number >Max or <Min

What is integer overflow?

400

public class OperatorTest2{

public static void main(String[] args){

System.out.println(1/4);

System.out.println(1.0/4);

System.out.println(1/4.0);

System.out.println((double)1/4);

System.out.println((int)1.0/4);

}

}

0, 0.25

0.25

0.25

0

500

Code needed to round

a double value to the nearest

positive integer?

int nearestPosInt= (int)(number + 0.5)

Random

100

Your teacher's name

What is Ms. Lydon

200

Your teacher's new name after November

Mrs. Fava

300

1) Methods & Control Structures

2) Classes

3) Arrays/ArrayList

4) 2D Arrays

4 FRQ Topics

400

Amount of questions on the exam.

40

500

all Java programs

start with.

public class MyProgram {

}