A transient variable is a variable that may not be serialized.

The Window, Frame and Dialog classes use a border layout as their default layout.

Threads block on I/O (that is enters the waiting state) so that other threads may execute while the I/O Operation is performed.

Objects that subclass the Observable class maintain a list of observers. When an Observable object is updated it invokes the update() method of each of its observers to notify the observers that it has changed state. The Observer interface is implemented by objects that observe Observable objects.

With respect to multithreading, synchronization is the capability to control the access of multiple threads to shared resources. Without synchronization, it is possible for one thread to modify a shared object while another thread is in the process of using or updating that object's value. This often leads to significant errors.

Yes, a lock can be acquired on a class. This lock is acquired on the class's Class object..

The stop(), suspend() and resume() methods have been deprecated in JDK 1.2.

The null is not a keyword.

The preferred size of a component is the minimum component size that will allow the component to display normally.

The setLayout() method is used to specify a container's layout.

The Panel and Applet classes use the FlowLayout as their default layout.

When a thread terminates its processing, it enters the dead state.

The Collections API is a set of classes and interfaces that support operations on collections of objects.

The digits 0 through 9 may not be used as the first character of an identifier but they may be used after the first character of an identifier.

The List interface provides support for ordered collections of objects.

It uses those low order bytes of the result that can fit into the size of the type allowed by the operation.

The Vector class provides the capability to implement a growable array of objects

A (non-local) inner class may be declared as public, protected, private, static, final, or abstract.

The Iterator interface is used to step through the elements of a Collection.

The >> operator carries the sign bit when shifting right. The >>> zero-fills bits that have been shifted out.

setBounds() method is used to set the position and size of a component.

When a task invokes its yield() method, it returns to the ready state. When a task invokes its sleep() method, it returns to the waiting state.

The EventObject class and the EventListener interface support event processing.

The sizeof operator is not a keyword.

Wrapped classes are classes that allow primitive types to be accessed as objects.

Garbage collection does not guarantee that a program will not run out of memory. It is possible for programs to use up memory resources faster than they are garbage collected. It is also possible for programs to create objects that are not subject to garbage collection.

A package statement must appear as the first line in a source code file (excluding blank lines and comments).

An object's finalize() method cannot be invoked by the garbage collector while the object is still reachable. However, an object's finalize() method may be invoked by other objects.

Panel.

Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Under time slicing, a task executes for a predefined slice of time and then reenters the pool of ready tasks.

The scheduler then determines which task should execute next, based on priority and other factors.

The Canvas, Frame, Panel, and Applet classes support painting.

The readLine() method returns null when it has reached the end of a file.

Window.

Clipping is the process of confining paint operations to a limited area or shape.

A native method is a method that is implemented in a language other than Java.

Yes, a for statement can loop indefinitely. For example, consider the following:

for(;;) ;

Order of precedence determines the order in which operators are evaluated in expressions.

Associatity determines whether an expression is evaluated left-to-right or right-to-left.

A thread enters the waiting state when it blocks on I/O.

The default value of an String type is null.

If a checked exception may be thrown within the body of a method, the method must either catch the exception or declare it in its throws clause.

The CheckboxMenuItem class extends the MenuItem class to support a menu item that may be checked or unchecked.

A task's priority is an integer value that identifies the relative order in which it should be executed with respect to other tasks. The scheduler attempts to schedule higher priority tasks before lower priority tasks.

The java.awt.AWTEvent class is the highest-level class in the AWT event-class hierarchy.

A thread is in the ready state after it has been created and started.

An anonymous class may implement an interface or extend a superclass, but may not be declared to do both.

MenuItem.

The purpose of finalization is to give an unreachable object the opportunity to perform any cleanup processing before the object is garbage collected.

Object.

After a thread is started, via its start() method or that of the Thread class, the JVM invokes the thread's run() method when the thread is initially executed.

If an expression involving the Boolean & operator is evaluated, both operands are evaluated. Then the & operator is applied to the operand. When an expression involving the && operator is evaluated, the first operand is evaluated.

If the first operand returns a value of true then the second operand is evaluated. The && operator is then applied to the first and second operands. If the first operand evaluates to false, the evaluation of the second operand is skipped.

Box.Filler, Button, Canvas, Checkbox, Choice, Container, Label, List, Scrollbar, or TextComponent.

The GregorianCalendar class provides support for traditional Western calendars.

validate() method is used to cause a container to be laid out and redisplayed.

The purpose of the Runtime class is to provide access to the Java runtime system.

An object's finalize() method may only be invoked once by the garbage collector.

The finally clause is used to provide the capability to execute code no matter whether or not an exception is thrown or caught.

A program's main() method takes an argument of the String[] type.

The = operator is right associative.

Yes, a double value can be cast to a byte.

It must provide all of the methods in the interface and identify the interface in its implements clause.

The start() method of the Thread class is invoked to cause an object to begin executing as a separate thread.

TextField and TextArea.

Frame.

Commas are used to separate multiple statements within the initialization and iteration parts of a for statement.

The wait(), notify(), and notifyAll() methods are used to provide an efficient way for threads to wait for a shared resource. When a thread executes an object's wait() method, it enters the waiting state. It only enters the ready state after another thread invokes the object's notify() or notifyAll() methods..

An abstract method is a method whose implementation is deferred to a subclass.

A Java source code file takes the name of a public class or interface that is defined within the file. A source code file may contain at most one public class or interface. If a public class or interface is defined within a source code file, then the source code file must take the name of the public class or interface.

If no public class or interface is defined within a source code file, then the file must take on a name that is different than its classes and interfaces. Source code files use the .java extension.

A Canvas object provides access to a Graphics object via its paint() method.

The high-level thread states are ready, running, waiting, and dead.

The read() method returns -1 when it has reached the end of a file.

No. An object cannot be cast to a primitive value.

A non-static inner class may have object instances that are associated with instances of the class's outer class.

A static inner class does not have any object instances.

String objects are constants. StringBuffer objects are not constants.

A private variable may only be accessed within the class in which it is declared.

An object's lock is a mechanism that is used by multiple threads to obtain synchronized access to the object. A thread may execute a synchronized method of an object only after it has acquired the object's lock.

All objects and classes have locks. A class's lock is acquired on the class's Class object.

The Dictionary class provides the capability to store key-value pairs.

The elements of a BorderLayout are organized at the borders (North, South, East, and West) and the center of a container.

It is referred to as the modulo or remainder operator. It returns the remainder of dividing the first operand by the second operand.

An object reference be cast to an interface reference when the object implements the referenced interface.

The Frame class extends Window to define a main application window that can have a menu bar.

The Object class is extended by all other classes.

A reachable object cannot be garbage collected. Only unreachable objects may be garbage collected..

It is written x ? y : z.

The FontMetrics class is used to define implementation-specific properties, such as ascent and descent, of a Font object.

The fractional part of the result is truncated. This is known as rounding toward zero.

If a thread attempts to execute a synchronized method or synchronized statement and is unable to acquire an object's lock, it enters the waiting state until the lock becomes available.

The Reader/Writer class hierarchy is character-oriented, and the InputStream/OutputStream class hierarchy is byte-oriented.

A catch clause can catch any exception that may be assigned to the Throwable type. This includes the Error and Exception types.

A class that is declared without any access modifiers is said to have package access. This means that the class can only be accessed by other classes and interfaces that are defined within the same package.

The SimpleTimeZone class provides support for a Gregorian calendar.

The Map interface replaces the JDK 1.1 Dictionary class and is used associate keys with values.

A class does not inherit constructors from any of its superclasses.

The only statements for which it makes sense to use a label are those statements that can enclose a break or continue statement.

The purpose of the System class is to provide access to system resources.

setEditable().

The elements of a CardLayout are stacked, one on top of the other, like a deck of cards.

No. It is not a valid java operator.

The eight primitive types are byte, char, short, int, long, float, double, and boolean.

The Class class is used to obtain information about an object's design.

When a window is repainted by the AWT painting thread, it sets the clipping regions to the area of the window that requires repainting.

The String literal "abc" is not a primitive value. It is a String object.

An event-listener interface defines the methods that must be implemented by an event handler for a particular kind of event.

An event adapter provides a default implementation of an event-listener interface.

During compilation, the values of each case of a switch statement must evaluate to a value that can be promoted to an int value.

An interface may be declared as public or abstract.

A class is a subclass of itself.

The java.util.EventObject class is the highest-level class in the event-delegation class hierarchy.

The ActionEvent event is generated as the result of the clicking of a button.

A component can handle its own events by implementing the required event-listener interface and adding itself as its own event listener.

The elements of a GridBagLayout are organized according to a grid. However, the elements are of different sizes and may occupy more than one row or column of the grid. In addition, the rows and columns may have different sizes.

Java uses layout managers to lay out components in a consistent manner across all windowing platforms. Since Java's layout managers aren't tied to absolute sizing and positioning, they are able to accomodate platform-specific differences among windowing systems.

The Collection interface provides support for the implementation of a mathematical bag - an unordered collection of objects that may contain duplicates.

A local inner class may be final or abstract.

A static variable is associated with the class as a whole rather than with specific instances of a class.

Non-static variables take on unique values with each object instance.

The paint() method supports painting via a Graphics object. The repaint() method is used to cause paint() to be invoked by the AWT painting thread.

The File class is used to create objects that provide access to the files and directories of a local file system.

Yes, an exception can be rethrown.

The abs() method is used to calculate absolute values.

The operating system's task scheduler allocates execution time to multiple tasks. By quickly switching between executing tasks, it creates the impression that tasks execute sequentially.

The compiler supplies a default constructor for a class if no other constructors are provided.

The finally clause of the try-catch-finally statement is always executed unless the thread of execution terminates or an exception occurs within the execution of the finally clause.

Component.

A protected method may only be accessed by classes or interfaces of the same package or by subclasses of the class in which it is declared.

By associating Checkbox objects with a CheckboxGroup.

The non-Unicode letter characters $ and _ may appear as the first character of an identifier

Two methods may not have the same name and argument list but different return types.

When a task's interrupt() method is executed, the task enters the ready state. The next time the task enters the running state, an InterruptedException is thrown.

There are two types of casting, casting between primitive numeric types and casting between object references.

Casting between numeric types is used to convert larger values, such as double values, to smaller values, such as byte values.

Casting between object references is used to refer to an object by a compatible class, interface, or array type reference.

A program's main() method has a void return type.

Window, Frame, Dialog, FileDialog, Panel, Applet, or ScrollPane.

A Choice is displayed in a compact form that requires you to pull it down to see the list of available choices. Only one item may be selected from a Choice.

A List may be displayed in such a way that several List items are visible. A List supports the selection of one or more List items.

The Java runtime system generates RuntimeException and Error exceptions.

The ObjectInputStream class supports the reading of objects from input streams.