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Is java dynamic typed language?
Sandhya.Kishan
- May 16th, 2012
Yes, java is dynamic typed language as it has a property of a language where type checks are performed mostly at run time.A program is dynamically typed if it uses at least one dynamically typed variable.
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What is the purpose of the File class
The File class is used to create objects that provide access to the files and directories of alocal file system.
Sandhya.Kishan
- May 16th, 2012
File class is used to provide methods to perform some basic file-system operations such as checking the
file length,create/remove folders etc.File class is used to read and write data to and from files.It provides access to directories of local file system with the help of objects created. -
Which Math method is used to calculate the absolute value of a number
The abs() method is used to calculate absolute values.
Sandhya.Kishan
- May 16th, 2012
The math method used to calculate the absolute value of a number is abs() method.
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Can an exception be rethrown
Yes, an exception can be rethrown.
Sandhya.Kishan
- May 16th, 2012
An exception can be rethrown by using keyword throw.
Example:
try {
// code here that throws an Exception
}
catch (Throwable t) {
throw t; // (re)throw it in their face
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What is web.xml?
Sandhya.Kishan
- May 16th, 2012
The web.xml defines each servlet and JSP page within a Web Application. It enumerates enterprise beans referenced in the Web application. It also provides configuration and deployment information fo...
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What is a layered pane?
Sandhya.Kishan
- May 16th, 2012
LayeredPane is a container which allows switching between different sets of displayed components. Each set of components, called a page, is declared within the LayeredPane component and its possible t...
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What is the SimpleTimeZone class
The SimpleTimeZone class provides support for a Gregorian calendar.
Sandhya.Kishan
- May 17th, 2012
The concrete subclass of TimeZone that represents a time zone which is use support the Gregorian calendar is called as a simple time zone class.Historical changes are not handled by this class.
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What is the Map interface
The Map interface replaces the JDK 1.1 Dictionary class and is used associate keys withvalues.
Sandhya.Kishan
- May 17th, 2012
Map interface represents a mapping between a key and a value without duplicate keys.The maps contents are viewed as a set of keys, collection of values, or set of key-value mappings. Map permits null ...
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Is &&= a valid Java operator
No, it is not.
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Which TextComponent method is used to set a TextComponent to the readonlystate
setEditable()
Sandhya.Kishan
- May 17th, 2012
The text component method which is used to set a textcomponent to the read only state is setEditable() method.
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To what value is a variable of the boolean type automatically initialized
The default value of the boolean type is false.
Sandhya.Kishan
- May 19th, 2012
A Boolean type is automatically initialized to value 0 or false value.
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What is the purpose of a statement block
A statement block is used to organize a sequence of statements as a single statementgroup.
Sandhya.Kishan
- May 19th, 2012
Statements that are of a sequence are organized as a single statement group with the help of statement block.
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What modifiers may be used with a top-level class
A top-level class may be public, abstract, or final.
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What is a layout manager
A layout manager is an object that is used to organize components in a container.
Sandhya.Kishan
- May 19th, 2012
Layout managers are software components which have the ability to lay out widgets by their relative positions without using distance units.It is an object that implements the LayoutManager interface* and determines the size and position of the components within a container.
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How can a dead thread be restarted
A dead thread cannot be restarted.
Sandhya.Kishan
- May 19th, 2012
A thread once dead cannot be restarted. The thread is said to be dead only after it completes its execution with the expected results hence dead thread cannot be restarted.
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Does Java have destructors?
No garbage collector does the job working in the background
Sandhya.Kishan
- May 22nd, 2012
Java does not support destructors, since java supports the concept of garbage collection,hence the garbage collector is used to automatically free the space which has occupied by the program while run...
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What are the disadvantages of using threads?
DeadLock.
Sandhya.Kishan
- May 22nd, 2012
The disadvantage of thread is that in may result in the starvation because of race conditions and deadlocks.
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What is the List interface
The List interface provides support for ordered collections of objects.
Sandhya.Kishan
- May 22nd, 2012
List interface extends collection interface.List interface is used for positional access,search,iteration and for range view operations.
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What interface is extended by AWT event listeners
All AWT event listeners extend the java.util.EventListener interface.
Sandhya.Kishan
- May 22nd, 2012
Java.util.EventListener interface is extented by all AWT event listeners.
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Which arithmetic operations can result in the throwing of anArithmeticException
Integer / and % can result in the throwing of an ArithmeticException.
Java Interview Questions
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