How to get last modified date of a file?

Correct Answer: boolean isDirectory();

Correct Answer: boolean isFile();

Correct Answer: To create directory on the HD we use mkDir() method: boolean mkDir(); This method returns true if the directory is created on HD This method returns false if the directory is already existing on 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: 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

Correct Answer: Executing more than one program simultaniously(ie at time) Ex: Windows media player is a program Internet explorer(IE) is another program executing both the programs at a time is called multi tasking

Correct Answer: Executing two or more blocks (threads) of a program at a time is called MultiThreading

Correct Answer: To do multi threading in java we use interfaces and classes defined in javalang package Those classes and interfaces are: JavalangRunnable, Javalang Thread, JavalangThreadGroup