Bus 110

Front 1

Name the three iteration control stuctures employed by Java

Back 1

While, Do/While, For loop

Front 2

Which iteration control structure(s) will always execute the loop at least once ?

Back 2

do/while

Front 3

Whick iteration control structure(s) evaluate(s) the test expression before the loop is executed ?

Back 3

while

Front 4

Which iteration control structure(s) should be employeed when it can be determined in advance how many loop repetitions there should be ?

Back 4

for

Front 5

What will the following loop do ?

while (count < 10)
System.out.println("Hello");

Back 5

Infinite loop, since there is no increment.

Front 6

Explain the difference between the execution of the Break and continue within a loop.

Back 6

The break statement is used to immediately terminate a loop.

The continue statement is used to skip over a single loop iteration.

Front 7

What four things must be specified in a method header ?

Back 7

modifier, return type, method name and parameter list

Front 8

Three possible modifers for Java methods are...

Back 8

private, public and protected

Front 9

Explain the difference between a void method and a non-void method.

Back 9

A non-void method returns a single value to the calling program.

A void method performs specific tasks or operates on class data.

Front 10

Explain the difference between and argument and a parameter.

Back 10

Arguments are values/variables used within the method call. (variables r & h used in the method call)

A parameter is a variable in the method header used to accept a data item during a method call. (variables rate and hours)

Front 11

T or F
When a method does not have a return type, you must indicate this with the keyword null.

Back 11

False.

(keyword is void)

Front 12

When using an assignment operator to call a method, the method must include a(n) _________ statement.

Back 12

Return

Front 13

T or F
A variable defined in main () has visibility in all methods called by main().

Back 13

False.

(Local to that method)

Front 14

What is a local variable ?

Back 14

Only visible within that block.

Front 15

What is meant by the scope of a variable or method ?

Back 15

From where it can be accessed.

Front 16

T or F
Variables should be defined as locally as possible and constants as globally as possible.

Back 16

True

Front 17

What are the two things that make up a class declaration ?

Back 17

data members & method members

Front 18

What is the scope of a private class member ?

Back 18

Accessible from w/in a class

Front 19

What is the scope of a public class memeber ?

Back 19

Accessible from outside class.

Front 20

The concept of combining data with a set of operations that are dedicated to manipulating the data so tighly that outside operations cannot affect the data is called ____________.

Back 20

Encapsulation

Front 21

T or F
Only public members of a given class can access the pricate members of that class.

Back 21

True

Front 22

Why are classes declared and objects defined ?

Back 22

No memory is reserved for declared values, defined objects reserve memory for the value.

Front 23

T or F
Utility methods are declared as private methods.

Back 23

True.

Front 24

At the abstract level, a class can be described as a(n) ______ that defines the behavior of its objects.

Back 24

ADT

Front 25

At the implementation level, a class consists of ______ and _______ members.

Back 25

Data; Method

Front 26

T or F
THe abstract view of a vlass provides its inside view, showing the secrets of its data organization and mehod implementation.

Back 26

False.

(it's like a class diagram)

Front 27

What is meant by the term "behavior" relative to a class object ?

Back 27

Methods

Front 28

OOP provides an important feature called __________, which is a mechanism for deriving new classes from existing ones.

Back 28

inheritance

Front 29

A method that simply returns the value of a class data member is called a(n) ______ method.

Back 29

get

Front 30

What is the purpose of a constructor ?

Back 30

Create & initialize an object.

Front 31

A private method of a class is often called a(n) ________ method.

Back 31

utility

Front 32

T or F
A constructor never has a return type, not even a void.

Back 32

True

Front 33

What operator is used to send a message to an object ?

Back 33

dot operator (xxx.xxx)

Front 34

Explain why you should use packages when developing Java programs.

Back 34

To group similar functionality in one place.

Front 35

A package called accounting must be sotred in a directory called _______.

Back 35

Accounting