Unit 1 (Using Objects and Methods)
Keyword used to identify that a method has no return type
Void
The keyword ___ is used to skip the rest of the code in an iteration and start the next iteration, and the keyword ___ is used to exit the loop altogether.
What is continue and break?
In a class, attributes are typically ___ and methods are typically ___.
What is private and public?
The main advantage of using ArrayLists over arrays.
What is being able to change the size of the ArrayList/ArrayList is more flexible?
Term that refers to a program being able to perform its tasks as expected under stated conditions without failure.
What is system reliability?
Statement that returns a random number in between 45 and 68. (Use AP CSA way of generating random numbers)
(int)(Math.random() * 24)+45?
Below is an example (be specific):
int[] numbers = {10, 20, 30, 40, 50};
for (int number : numbers) {
System.out.println(number);
}
What is an enhanced for loop?
The purpose of a Constructor in a Java class
To initialize the instance variables of a new object
The error in the code below (assume libraries are imported as necessary):
ArrayList<int> heights = new ArrayList<>();
heights.add(4);
heights.add(2);
heights.add(3);
System.out.println(heights.get(1));
What is creating an ArrayList with primitive variables?
This is a term used to describe code written by others that you do not need permission to use .
What is open source?
Term referring to how converting a double to an integer always rounds down (i.e. removes anything past the decimal point).
What is truncating/flooring?
Line of code that creates a new string called sub from a string str, including the first two characters out of the last three characters of str (i.e. if str = "elephant", sub = "an").
What is String sub = str.substring(str.length() - 3. str.length()-1);?
The name of a method you can include in your class in order to return a pre-defined string when an instance of the class is directly printed
What is toString?
Given int[][] grid = new int[3][5];, what is the value of grid.length[0] and grid.length?
grid.length = 3 (rows); grid[0].length = 5 (cols)
Term that refers to the Java behavior where if the first conditional for && is false, the second one isn't evaluated (same with ||, if the first conditional is true the second isn't evaluated).
What is short circuit evaluation?
What does this print?
System.out.print(3+5.0/2"Test"+13/2*6);
5.5Test36
Name of an error that is thrown when you try to access an element of an array that doesn't exist (i.e. array[array.length]).
What is IndexOutOfBoundsException?
If a method in the Book class is defined as public void setPages(int pages), what is the keyword used to distinguish the instance variable from the parameter?
this (e.g., this.pages = pages;)
Write a line of code to initialize a 2D array of Strings named seatingChart with 4 rows and 6 columns.
String[][] seatingChart = new String[4][6];
The MCQ portion of the AP CSA test makes up ___% of your grade and the FRQ portion of the AP CSA test makes up ___% of your grade.
What is 55 and 45?
The mandatory entry point for any standalone Java application, acting as the starting method the Java Virtual Machine
public static void main(String[] args)
Allows you to add certain characters to a string, such as \n for new line or \' for '.
What is an escape sequence?
Write a signature for a getter method for a private double price variable.
public double getPrice()
Names of both searching algorithms and names of all three sorting algorithms.
What are linear search, binary search, selection sort, insertion sort, and merge sort? (Will also count bubble sort).
This number written down in a base 10 system: 110110
What is 54?