CIS 104 Exam 3 Review
java is a _____ oriented language
object
If a variable is not declared as static it cannot be directly used in a static method.However, it can be indirectly accessed as an ______ -_____
object attribute
If at least _____ operand is a ____ ____ number in the division the the answer will be a ___ ____ as well.
one floating point
System.out.println("Please enter length + "\n") is used to?
output results on the screen
in the structure of a java program what comes second?
package imports
If you need the operations in a statement to be done in a certain order, use?
parentheses
out is a ____ _____ member of _____
print stream System
The break statement is an immediate exit from the innermost switch, while, do-while, or for statement and the _____ executes the____ ____ after that.
program first statement
______ expressions evaluate to the ______ values true or false
relational boolean
Widely used in hashing functions, modulus produces the interger ____ after two numbers are divided
remainder
A ____ _____ specifies that a group of statements is to be repeated while some condition remains true
repetition structure (loop)
the _____ keyword is used to actually return the value after the method processing has completed
return
in addition to taking inputs in the form of parameters, methods also can ____ _____
return values
associativity of !
right to left
associativity of =
right to left
All statements in Java end with a?
semicolon
switch ( expression ) { case value1 : _________ break ; case value2 : ___________ break ; . . . default: ______________) break ; }
statement
even though it may contain many characters, think of a _____ as a single entity
string
nextLine gets a?
string
A ____ statement is provided because there is less clutter and it is easier to read.
switch
_______ ( expression ) { case value1 : statement(s) break ; case value2 : statement(s) break ; . . . default: statement(s) break ; }
switch
what provides an immediate exit from the innermost switch, while, do-while, or for statement?
break
what statement alters the flow of control in a program when used in while, do-while, for loops, and switch statements?
break
System.in.read does not input data in a friendly manner but instead as a?
byte stream
The ____ method should have a variable to receive the returned value
calling
you use a method by______ it
calling
Parentheses ____ the order in which operations are evaluated
change
Even if you don't need to change the order of execution, you can use parentheses to ____ a complex expression
clarify
The ____ for your program has a main method
class
a method in a _____ is a set of instructions or statements that provide some functionality by the class
class
in the structure of a java program what comes after the package imports?
class name
we use the import statement to make ____ with _____ we need available to us
classes methods
multiple arguments are separated by?
commas
Before using a variable you must give the ___ some information about the variable, you must ___ it
compiler declare
Data items in an array are stored_______ in _______
contiguously memory
Arrays can be composed from any____ ____ we need.
data type
what is a system class method for reading?
System.in.read
Which operator has second precedence right after ()?
!
Which operators have seventh precedence right after == != ?
&&
Which operator has higest precedence?
()
Which operators have third precedence right after ! ?
* / %
Which operators have fourth precedence right after */% ?
+ -
Which operators have fifth precedence right after + - ?
< <= > >=
Which operators have last precedence ?
=
Which operators have sixth precedence right after , < <= > >=?
== !=
in a switch statement the resulting value is compared with each of the___ _____ and if there is a match then the statements for that case are executed.
Case values
What are the two types of loops?
Counter-controlled and Event-controlled
What is this an example of? if (day == 0 ) { System.out.println ("Sunday") ; } if (day == 1 ) { System.out.println ("Monday") ; } if (day == 2) { System.out.println ("Tuesday") ; } if (day == 3) { System.out.println ("Wednesday") ; }
Multiple selection with if
what is a class with methods that analyze an input stream?
Scanner
We use ____ ___ as a helper class in our class work
Scanner class
switch ( expression ) { case value1 : statement(s) ________ ; case value2 : statement(s) ________ ; . . . default: statement(s) break ; }
break
in java what is used to create a program?
a class
what may contain many characters.
a string
Outside a method, a variable can be declared ______ and it is a _____ attribute
anywhere class
System.out.println("HelloWorld"); calls the method println() with a single ______ also called a ______
argument parameter
System.out.println("Please enter length + "\n") ______ to the function are listed inside parentheses "()"
arguments
what is a collection of data items that share the same name and the same data type.
array
____ _____ take two expressions as operands
binary operators
The ______ causes program control to jump to the closing brace of the switch structure.
break
usually the last statement in a switch statement should be a?
break
The scanner class converts the input stream into tokens, You can convert these tokens into the needed ____ ______ by using the various next methods •nextInt to get an integer •nextLine to get a string
data type
The declaration statement has _____ _____the of the variable followed by the_____ ____
data type variable name
what is the basic form of a variable?
datatype variable;
A variable declared within a method can only be used from the point of _______ to the end of the ______
declaration method
_____ should be placed at the beginning of a method before any executable statements
declarations
The visibility or scope of a variable depends on where they are _______.
declared
Within a method, a variable must be ______ before it is used
declared
A switch statement will compile without a____ _______, but always consider using one.
default case
The fractional part of any answer is _______ with integer division.
discarded
A ________ block is always executed at least once
do-while
how is a do-while loop constructed?
do{statement}while(condition);
Each data items is known as an ______ of the array. An array's elements can be accessed individually.
element
int i = sc.nextInt(); is an example of?
external method
when you include the name of the object you instantiated that contains them its called?
external method
Once an array is instantiated, its size remains ____.
fixed
with counter-controlled repetition, a ______ loop is the best choice
for
The initialization of the loop control variable, the loop continual condition test, and increment of control variable are handled in the?
for loop structure
how is a for loop constructed?
for(expression1;expression2;expression3){statement}
_____ -_____ are declarations of local variables. The values passed are assigned to those variables.
formal parameters
the type of value return is indicated in the ______ of the method
header
in the structure of a java program what comes first?
header comments
Java has some ___ ____ that take a byte stream and repurpose it for certain uses
helper classes
what statement can be used with while loops?
if statement
what is the structure of an if statement?
if(condition){statement}
what is the structure of an if-else statement?
if(condition){statement}else{statement}
we use the ______ statement to make classes with methods we need available to us
import
If a method and its class are not available in the base java, you use an _____ ___ to incorporate it into your program
import statement
Each data items is known as an element of the array. An array's elements can be accessed ______.
individually
declaring variables you can use the basic form datatype variable; and you can also give ___ ____ which looks like datatype variable = ______;
initial value expression
for(exp1;exp2;exp3){statement} what is exp1?
initialization
System.out.println("Please enter length + "\n") would prompt the user to ____ needed data.
input
Expression or identifier must be of type?
int, char, short, or byte
nextInt gets an?
interger
Integer division occurs if both operands are ______.
intergers
in a modulus operation both operands must be?
intergers
______ is a collection of interacting objects
java
System.out.println("HelloWorld"); is an example of?
java statement
associativity of &&
left to right
associativity of * / %
left to right
associativity of + -
left to right
associativity of < <= > >=
left to right
associativity of == !=
left to right
associativity of ||
left to right
associativity of ()
left to right/inside-out
Formal parameters are declarations of ____ _____. The values passed are assigned to those variables.
local variables
Methods only have acces to their own ____ -______
local variables
I you need to test multiple conditions in order to make a decision, use -______ _____.
logical operators
____ -______ combine simple conditions to make complex conditions
logical operators
for(exp1;exp2;exp3){statement} what is exp2?
loop continuation test
Every program must have a ___ ___
main method
in the structure of a java program what comes after the class name?
main method
what is the starting point for your program?
main method
Methods only have access to their own local variables. This includes _______
main()
a _____ in a class is a set of instructions or statements that provide some functionality by the class
method
println() is a ?
method
you use a ____ by calling(invoking) it
method
Formal parameters are declarations of local variables. The values passed are assigned to those variables. Other local variables can be declared within the____ -______.
method body
System.out.print statement is a?
method call
You can add other _____ and call them from main.
methods
You can import ______ from external packages like Scanner but you will also need to write your own _____ to provide the solution to the business problem
methods
nextInt, next, nextLine, are all?
methods
what are a key part of classes?
methods
what implement the operations we need to perform to solve the problem?
methods
what implements algorithms?
methods
logical operators test ____ -____
multiple decisions
What is this an example of? if (day == 0 ) { System.out.println ("Sunday") ; } else if (day == 1 ) { System.out.println ("Monday") ; } else if (day == 2) { System.out.println ("Tuesday") ; } else if (day == 3) { System.out.println ("Wednesday") ; } else if (day == 4) { System.out.println ("Thursday") ; } else if (day == 5) { System.out.println ("Friday") ; } else if (day = 6) { System.out.println ("Saturday") ; } else { System.out.println ("Error - invalid day.") ; }
multiple selection with if-else
your own methods are called by just their _______(along with parameters)
name
An array is a collection of data items that share the same _____ and the same ___ ___.
name data type
what means one loop is embedded inside another?
nesting
"\n" denotes a?
newline
is it uncommon to see nested for loops?
no
in a ______ statement the resulting value is compared with each of the case values and if there is a match then the statements for that case are executed.
switch
You can easily add new cases to a ____ statement but that becomes involed with the cluttered nested _______ structure
switch if-else
_____ is a class which is a collection of data and functionality, having computer system related capability
system
System.in.read is a ___ _____ method
system class
in the structure of a java program what comes after the main method?
the body of the program
what in a switch statement is executed first?
the expression
Scanner class converts the input streams into?
tokens
for(exp1;exp2;exp3){statement} what is exp3?
update of control variable
int width; boolean answer; are examples of ?
variable declarations
If a _____ is not declared as static it cannot be directly used in a _____ method
variable static
in an event controlled repetition what loop would you use if it was potential a block my never execute?
while
with event controlled repetition a ____ loop is the best choice
while or do-while
how is a while loop constructed?
while(condition){statement}
Java has three repetition structures what are they?
while, for, and do-while
can a nested loop be inside any other control structure?
yes
can any control structure (sequence, selection, or repetition) be nested?
yes
can loops be nested?
yes
is a if-else structure more efficient than a if structure?
yes
is a nested if else and a switch statement equally efficient?
yes
Which operators have eighth precedence right after && ?
||
