Prim
& Objs 1
& Objs 1
Boolean, If, Loops
Classes and Arrays
ArrayList and 2D Arrays
AP Question and Recursion
100
The three Primitive data types we use in AP CS A.
What are int, double, and boolean?
100
They mean logical AND and OR
What are && and || ?
100
It is the part of a class between the instance variables and the methods.
What is a constructor?
100
add()
How do you add an element to an ArrayList?
100
These are the 2 things you must have in a Recursive algorithm
Base Case and a Recursive call to the same method.
200
It adds with numbers, but concatenates with Strings.
What is the + symbol?
200
You use it to compare Objects, like Strings, to each other.
What is .equals()?
200
Instance Variables, Constructors, Methods
What are the 3 basic parts of a Class?
200
Row then Column
2D arrays are in what sort dimensional order?
200
Consider the following code segment.
String str1 = "LMNOP";
String str2 = str1.substring(3);
str2 += str1.substring(2, 3);
What is the value of str2 after executing this code segment?
OPN
300
min, max, sqrt, abs, rand, and others.
What are some of the Math methods?
300
It is the first line of a method, with the method name and list of parameters. But, not the return type.
What is the method signature?
300
This is if you try to access an Array element that doesn't exist.
What is an out of bounds error?
300
arr[0] would be the first one
How would you get the first Row of a 2D array?
300
Consider the following code segment.
int x = ((int) (Math.random() * 10)) + 5;
int y = ((int) (Math.random() * 5)) + 10;
System.out.println(x + y);
What is the max and min values that could be printed?
What is 15 and 28?
400
When we give a variable a name and type. (And set aside memory to store the variable value).
What is Declare or Declaration?
400
It is how you "carry" a NOT (!) through a compound Boolean expression !( A && B) = !A || !B
What is DeMorgan's Law?
400
You use this if you don't want to make an actual Object, but want to be able to run Methods from a Class.
What is static?
400
Linear Search
What is when you start at one end of an array (or arraylist) and check each element in turn.
400
What is 15 times?
500
It gives us part of a String.
What is .substring()?
500
They are the Object versions of primitives.
What are Integer and Double?
500
It is when you make the variables or fields Private, but the methods Public
What is Encapsulation?
500
Binary Search
With an ordered (sorted) array, you can pick the center and halve, making a search faster.
500
What is the result of mystery(1234)
What is 43211234?