AP CS Flashcards

8126438408	A keyword	A word that is part of the Java language	0
8126440897	String, Math	Examples of classes available by default but not actually keywords	1
8126444216	method call	A line of code that causes an method to be executed.	2
8126445769	method definition	Lines of code that include a header and a code block.	3
8126450865	method header	The first line of a method definition, contains information about parameters and any return value.	4
8126456994	strongly typed	A feature of computer languages where all variables must have code stating what their data type.	5
8126459914	data type	Keyword that states what type of values a variable will hold (or what type of value a method will return).	6
8126464634	primitive variable	A variable of the type: int, double, boolean, etc. these variables only contain a single value	7
8126469189	reference variable (aka object variable)	a variable which is not a primitive type. The value contained in the variable is a memory address to a memory location possibly containing many separate values comprising the object.	8
8126477969	methods cannot call other methods	a false statement about methods	9
8126486107	A call to a non-void method should somehow make use of the returned value.	a true statement about methods	10
8126486622	data structure	a way to use memory to organize and make accessible many pieces of information	11
8126491264	array	the simplest of data structures	12
8126493865	an array can change size after created	a false statement about arrays	13
8126499036	the number of elements in an array is found by reading the ".length" field of the array's object variable.	a true statement about arrays	14
8126503821	arr2D[0].length	how you typically find the number of columns in a 2-D array named arr2D	15
8126510547	Every non-void method should have...	a return statement at the end of its code block	16
8126514770	the break keyword	halts the execution of a loop	17
8126517456	the return keyword	halts the execution of a method and may also give back a value to the caller.	18
8126523663	7/2, 2/1, 4/2	Arithmetic expressions that evaluate to an integer value	19
8126524988	7/2.0, 2.0/1, (double) 4/2	Arithmetic expressions that evaluate to an decimal (i.e. real) number value	20
8126531293	A && !A	an always false expression	21
8126532324	A \|\| !A	an always true expression	22
8126534788	!(A && B) = !A \|\| !B	One form of De Morgans Law	23
8126540061	A && (B \|\| C) = (A&&B) \|\| (A&&C) A \|\| (B && C) = (A \|\| B) && (A \|\| C)	The Boolean distributive laws	24
8126541841	A4	164 in hexadecimal	25
8126544786	2B	43 in hexadecimal	26
8126547417	1001	9 in binary	27
8126549672	111	7 in binary	28
8126688973	boolean d = false;	a declaration of a boolean variable	29
8126696874	String [] myStuff = {"shoes", "devices", "bits of strings"};	Declaration of array and initialization using an initializer list	30
8126708461	boolean [] answers= new boolean [5]; for (int i= 0; i < answers.length; i++) { answers[i]= true; }	Declaration of an array, initialization of element values NOT using an initializer list	31
8126713323	for (int j = 100; true; j--) { // some code }	an infinite loop	32
8126740477	if (x != 0 && 100/x > 10) { /code/ }	example of use short-circuiting behavior of boolean expressions	33
8126756252	static	keyword declaring a method is not part of any object and exists for the entire life-time of the program	34
8126759041	new	keyword for allocating memory for an object (e.g. an array)	35
8126772452	array are not objects	false statement about the relationship of arrays and objects	36
8126777876	public MyClass(){	the header for a constructor	37
8126779994	super()	used to call the parent class' constructor from the child's constructor	38