ITCS-1213
The file extension of a Java source code file is A .class B .java C .bytecode D .exe
.java
What javadoc tag is used to specify the writer of the class source code? A @version B @writer C @author D @programmer
@author
A reference variable will hold an A Object B Address C Set of fields D Variable
Address
Where do you type javadoc comments? A Inside each method B At the top of the class definition file C Above each method heading D Anywhere in your source code file
At the top of the class definition Above each method heading
The name of the your source code file must: A Be exactly the same as the public class in the file B Must be short C Must start with a lowercase letter D Must start with an uppercase letter
Be exactly the same as the public class in the file
What is the name of the IDE we are using in lecture and lab? A Java B javac C BlueJ D Eclipse
BlueJ
A Java symbolic constant must be assigned a value when it is declared. A true B false
False
A class can have many different constructor methods as long as the names are different. A true B false
False
A class is an object, True or False
False
Every object has a reference variable holding its address, True or False
False
Fields and variables are the same thing, True or False
False
In a class definition file, each method must have a different name, True or False
False
Java is a compiled language and the compiler produces an executable. A true B false
False
Once an object is created the fields should not change their values. True or False
False
Once an object is created you can call the constructor method again to change the value of the fields A true B false
False
Only one instance can be created from a class definition, True or False
False
You can only create one instance of a class. A true B false
False
What must you include in the subject line of all email to me? A ITCS 1213 B Java C the reason your are writing D ITCS 1213-001
ITCS-1213-FALL
Where does execution of a Java application start? A In public static void main in a public class B In public main C In public static void main in a private class D In a class named public static void main
In a public void main in public class
In order to use the BlueJ debugger your code A Must have no syntax errors B Must have no logic errors C Must have no syntax and no logic errors D Must have two or more classes
Must have no syntax errors
When the address of an object is not stored in any reference variable, that object is known as a(n) A Empty object B orphan C Null object D Extra object
Null Object
If your method is reading input from one input stream only, how many Scanner objects are needed? A One object for each data item you are reading B Two, one to read ints, and one to read doubles C Only one D As many as the number of data items your project needed
Only one
Where are all fields declared? A Inside a main( ) method B Inside a constructor method( ) C Outside of any method D In the parameter list
Outside of any method
What class is prewritten and used to read input? A Scanner B Input C Keyboard D nextInt(
Scanner
By convention, all class names A Use camel notation B Are in all lowercase letters C Start with an uppercase letter D Are in all caps
Start with an uppercase letter
What built in class is used to mange sequences of characters? A string B Character C String D Buffer
String
Which of the following is not a Java primitive data type? A int B String C boolean D char
String
What built in class is used to manipulate and change sequences of characters? A String B Character C StringBuilder D string
StringBuilder
What parameter do you send to the constructor of the Scanner class to indicate you will use keyboard input? A keyboard B System C system.in D System.in
System.in
What are the javadoc comments used for? A To provide a format for html conversion B To provide inline comments C To check syntax errors D To provide standardization in code
To provide a format for HTML conversion
What is the purpose of the toString( ) method? A To print an object B To change the values of the fields C To return an object D To return a textual representation of the state of an object
To return a textual representation of the state of an object
A constructor for a class can be called many times to create instances A true B false
True
Both fields and local variables can be declared as final. A true B false
True
Every object must have a name, True or False
True
Fields are usually given private access, True or False
True
If you do not write a constructor method for you class, Java will provide one for you. A true B false
True
More than one reference variable can hold the address of an object, True or False
True
To use the debugger in BlueJ your class file must be compiled. A true B false
True
What is the return data type of the String class equals( ) method? A boolean B int C Depends on what type of data the obect holds D String
boolean
A java project is a collection of A classes B programs C BlueJ D functions
classes
Which method is used to "build" an object? A set( ) B class( ) C constructor method D mutate( )
constructor method
What Java operator allows you to access public methods? A set operator B get operator C new operator D dot operator
dot operator
The term for declaring the fields of a class and the methods that change the values of these fields is in one class definition file is: A effectiveness B private C encapsulation D Sequencing
encapsulation
What keyword is used to declare a constant field? A private B final C const D constant
final
What is the return type of the String class compareTo( ) method? A boolean B int C String D coid
int
The debugger helps you locate which types of errors? A syntax B Java C logic D stupid
logic
Another name for a set( ) method is a A get method B access method C mutater method D change method
mutator method
What operator is used to create object from class definitions(templates)? A create B new C construct D instantiate
new
What is the return type of the constructor method of a class? A void B Object C no return type is allowed D int
no return type is allowed
The two categories of data types in Java are A numeric and non-numeric B int and double C primitive and reference D object and numeric
primitive and reference
Which debugger command allows you to go into the code at a method call? A step B step into C continue D terminate
step into
A class is a: A template B instance C field D method
template
What does immutable mean? A strong B unchangeable C flexible D changeable
unchangeable
