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If the array is an array of primitive types, then all the elements of the array will be initialized to the default value corresponding to that primitive type.

When an exception is thrown within the body of a try statement, the catch clauses of the try statement are examined in the order in which they appear. The first catch clause that is capable of handling the exception is executed. The remaining catch clauses are ignored.

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

A child object constructor always first needs to construct its parent. In Java it is done via an implicit call to the no-args constructor as the first statement.

When a class is defined within a scope of another class, then it becomes inner class. If the access modifier of the inner class is static, then it becomes nested class.

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.

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.

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.

Polymorphism

Yes an Interface can inherit another Interface, for that matter an Interface can extend more than one Interface.

A static method should not refer to instance variables without creating an instance and cannot use "this" operator to refer the instance.

No, it's not possible to accessed outside it's package.

Path and Classpath are operating system level environment variales. Path is defines where the system can find the executables(.exe) files and classpath is used to specify the location of .class files.

An enumeration is an interface containing methods for accessing the underlying data structure from which the enumeration is obtained. It allows sequential access to all the elements stored in the collection.

Yes a Vector can contain heterogenous objects. Because a Vector stores everything in terms of Object.

The size is the number of elements actually stored in the vector, while capacity is the maximum number of elements it can store at a given instance of time.

The SimpleTimeZone class provides support for a Gregorian calendar .

The GregorianCalendar provides support for traditional Western calendars

All tasks must implement the run() method

setDaemon method is used to create a daemon thread.

Daemon thread is a low priority thread, which runs intermittently in the back ground doing the garbage collection operation for the java runtime system.

No in this case the finally block will not execute because when you say System.exit (0); the control immediately goes out of the program, and thus finally never executes.

Externalizable is an interface which contains two methods readExternal and writeExternal. These methods give you a control over the serialization mechanism.

If a class is declared within a class and specify the static modifier, the compiler treats the class just like any other top-level class. Nested top-level class is an Inner class.

No, there is no need to import this package. It is by default loaded internally by the JVM.

CLASSPATH and PATH are the two variables.

Generics provide compile-time type safety that allows programmers to catch invalid types at compile time. Java Generic methods and generic classes enable programmers to specify, with a single method declaration, a set of related methods or, with a single class declaration, a set of related types.

java.net.Socket class represents the socket that both the client and server use to communicate with each other.

java.net.ServerSocket class is used by server applications to obtain a port and listen for client requests

Socket based communications allows only to send packets of raw data between applications. Both the client-side and server-side have to provide mechanisms to make the data useful in any way.

Sockets are flexible and sufficient. Efficient socket based programming can be easily implemented for general communications. It cause low network traffic.

Sockets provide the communication mechanism between two computers using TCP. A client program creates a socket on its end of the communication and attempts to connect that socket to a server.

It refers to writing programs that execute across multiple devices (computers), in which the devices are all connected to each other using a network.

It is a simple drawing surface which are used for painting images or to perform other graphical operations.

It is used to specify the name of the applet class.

getImage(URL object, filename) is used for this purpose.

It initializes the applet and is the first method to be called.

Life cycle involves the following steps −

• Initialization

• Starting

• Stopping

• Destroying

• Painting

The main thread is created automatically and it begins to execute immediately when a program starts. It ia thread from which all other child threads originate.

It is a public static method used to obtain a reference to the current thread.

It is used to find out whether a thread is still running or not.

It is used to pause or temporarily stop the execution of the thread.

Import statement is allowed at the beginning of the program file after package statement.

Yes, an example can be break one;

Hexadecimal Numbers are denoted by leading 0x or 0X in java, example − 0XF

Octal Numbers are denoted by leading zero in java, example: 06

No, Java does not allow Default Arguments.

MenuItem class

The range of the short type is -(2^15) to 2^15 - 1.

setBounds() method is used for this purpose.