java7

Which of these packages contain classes and interfaces used for input & output operations of a program?

• java.util
• java.lang
• java.io
• all of the above

Which of these class is not a member class of java.io package?

• String
• StringReader
• Writer
• File

Java I/O is used to process the?

• Input
• Output
• Both
• None of these

Which of these is method for testing whether the specified element is a file or a directory?

• IsFile()
• isFile()
• Isfile()
• isfile()

In java, how many streams are created for us automatically?

• 2
• 3
• 4
• 5

Which of these is a type of stream in Java?

• Integer Stream
• Byte Stream
• Short Stream
• Long Stream

Which of these modifiers can be used for a variable so that it can be accessed from any thread or parts of a program?

• transient
• global
• volatile
• no modifier

Transient keyword in java is used in

• serialization
• synchronization
• inheritance
• polymorphism

The instanceof operator can be used to determine if an object is:

• An instance of a class that implements a given interface
• An instance of a class
• An instance of a subclass of a class
• All of these

Which of these operators can be used to get run time information about an object?

• getInfo()
• info()
• instanceOf()
• getIn()