How to create Directory on the HD?

Correct Answer: We can use the following method call: boolean createNewFile(); This method creates a new file on the HD If a file is already existing with the name given in the constructor then this method does not creates file on HD If file is successfully created then this method returns true If file is already existing on the HD then this method returns false This method may throw IOException whenever IO error is generated while creating file on HD

Correct Answer: to access non-public data outside class getter methods be defined but we cannot define a method inside interface we can declared a method inside interface

Correct Answer: bcoz interface does not contains any initializers and constructors to initialize its data members

Correct Answer: Interface data is static data why bcoz interface supports multiple inheritance if inteface data is non-static then there is chance for replication of the data (bcoz of replication of data ambiguity problem occurs )

Correct Answer: abstract method is a method declared with abstract modifier but with out body

Correct Answer: boolean isFile();

Correct Answer: boolean isDirectory();

Correct Answer: long lastModified(); we can give this return value to a date object and we can get data to be displayed

Correct Answer: File[] listFiles(); this method returns list of files stored in a directory

Correct Answer: A Thread is a block of code that can be executed in parallel with another block of code