Term
| How is an interface created? |
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Definition
| Through the methods they expose. |
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Term
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Definition
| Classes derived from other classes (inheriting fields and methods) |
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Term
| Abstract classes are what? |
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Definition
| A method that is declared w/out implementation (no braces, following a semicolon) |
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Term
| Interface Comparable imposes what? |
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Definition
| Natural ordering of the objects of each class that implements it. |
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Term
| TF, The finally block will not execute if the application terminates immediately by calling method System.exit |
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Definition
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Term
| What stream is most appropriate to display errors? |
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Definition
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Term
| TF if a program has a runtime error, it will not compile and run |
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Definition
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Term
| Which package is the Exception class in? |
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Definition
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Term
| A logical error is caused by what? |
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Definition
| The programmer making a mistake thus the program doesn't run as intended (but still runs) |
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Term
| What happens if the catch-or-declare requirement for a checked exception is not satisfied? |
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Definition
| The compiler will issue an error message indicating that the exception must be caught or declared. |
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Term
| Attempting to access an object through a reference variable before an object is assigned to it will result in which exception? |
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Definition
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Term
| TF, the finally block of a try-catch is mandatory, otherwise the program won't compile |
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Definition
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Term
| TF, int is an example of java class and integer is an example of a java primative |
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Definition
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Term
| The operand of throw can be object of RuntimeException clas |
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Definition
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Term
Will the print line statement execute here?
while(true?true:false)
{
System.out.println("hello");
break;
} |
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Definition
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Term
The following code legal.
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Definition
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Term
| Compiler enforces a catch-or-declare requiremnt for what kind of exception (unchecked, runtime checked) |
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Definition
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Term
| What is the name of the class that describes internal system errors? |
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Definition
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Term
| TF, "Object" class is superclass of "Throwable" class |
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Definition
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Term
| The types of errors described by Exception class can NOT be caught and handled by your program. TF? |
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Definition
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Term
| TF, throws clause does not specify the excpetions a method throws |
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Definition
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Term
| Is IOException a checked exception? |
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Definition
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Term
| TF, an exception is an event, which occurs during the execution of a progra, that dirupts the normla flow of the program's instructions |
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Definition
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Term
In the catch block below, what is arithmeticException?
catch ( ArithmeticException arithmeticException ) {
System.err.printf( arithmeticException );
} // end catch |
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Definition
| The name of the catch block's exception paramter. |
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Term
| TF, IndexOutOfBoundsException is thrown if you access an element in an aray outside the bounds of the array. |
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Definition
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Term
| All exception classes inherit, either directy or indirectly from: |
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Definition
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Term
| The comiler does not check the code to determine whether an checked exception is caught or declared...TF? |
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Definition
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Term
| The process in which a primative is converted to an object is called what? |
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Definition
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Term
| Collections cannot use primitives directly |
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Definition
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Term
| TF, Autoboxing happens automatically in all version of Java 5 and up |
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Definition
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Term
| TF, when implement an interface, having the metohods of methods fo that interface is completely optional |
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Definition
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Term
| When creating the methods in an interface, only what method must be made, and can it contain any actual functionality (code inside)? |
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Definition
| the declaration method must be made and no it cannot |
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Term
| What keyword is appropriate for creating an interface? |
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Definition
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Term
| An interface defines a(n) __________ relationship |
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Definition
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Term
| TF, an interface can be treated as a type |
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Definition
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Term
| What is the proper way to get the size of an array? |
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Definition
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Term
| TF, Interfaces are used to encode similarities which the classes of various types share, but do not necessarily constitute a class relationship. |
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Definition
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Term
| implicitly, all interfaces are what? (public, protected, private) |
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Definition
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Term
| When does dynamic binding occur in java? |
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Definition
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Term
Which of the following would be the wrapper class of this Iterator for loop?
for ( E bar : set ) {
} |
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Definition
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Term
| TF, the Comparable interface requires that the compareTo method be implemented. |
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Definition
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Term
| To get the size of an ArrayList, the length() method will be used...TF? |
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Definition
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Term
| Each object of a class shares static variable, TF? |
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Definition
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Term
| Interfaces cannot specify implementaions for methods, but they can for their... |
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Definition
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Term
| A class can extend only one class, but it can impliment many what? |
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Definition
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Term
| Can an interface contains constructors? |
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Definition
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Term
What is the output of the following program (If you don't understand, try to run it)?
public class Test {
public static void main(String[] args) {
Boolean b1 = new Boolean(true);
Boolean b2 = new Boolean(true);
System.out.print(b1 == b2);
}
} |
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Definition
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Term
What is the output of the following program (If you don't understand, try to run it)?
public class Test {
static voaid pass(int i){
System.out.println("I am an int");
}
static void pass(Integer i){
System.out.println("I am an Integer");
}
public static void main(String[] args) {
pass(1);
}
} |
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Definition
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Term
What is the output of the following program (If you don't understand, try it)?
import java.util.ArrayList;
import java.util.TreeSet;
public class Test{
public static void main(String... args) {
ArrayList<Integer> MyList = new ArrayList<Integer>();
MyList.add(21);
MyList.add(3);
MyList.add(2);
MyList.add(3);
MyList.add(21);
MyList.add(2);
MyList.add(20);
TreeSet<Integer> tree = new TreeSet<Integer>(MyList);
System.out.println(tree.size());
}
} |
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Definition
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Term
| STATIC polymorphics in Java is acheved through what |
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Definition
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Term
| Polymorphism is WHAT!? kind of relationship? |
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Definition
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