Table of Contents

    Java Library Classes and Packages

    December 14, 2025 180 views

    Related Questions

    Question 1
    What is the difference between byte oriented IO and character oriented IO ? How are these two performed in Java ?
    Question 2
    Which class buffers the input received from an InputStreamReader object?
    Question 3
    Which package is by default imported in every Java program?
    Question 4
    Name the block that encloses the code that may encounter anomalous situations.
    Question 5
    In which block can you throw the exception?
    Question 6
    Which block traps and handles an exception?
    Question 7
    Can one catch block sufficiently trap and handle multiple exceptions?
    Question 8
    Which block is always executed no matter which exception is thrown?
    Question 9
    NumberFormatException is subclass of which exception class?
    Question 10
    IOException is subclass of which exception class?
    Question 11

    What is the role of
    (i) throws keyword?
    (ii) throw keyword?
    Question 12
    Why is exception handling necessary?
    Question 13
    Difference between equals() and equalsIgnoreCase() string functions?
    Question 14
    Difference between length() and capacity() string functions?
    Question 15
    The default package is a package without any name and is imported for you.
    Question 16
    Name the class that translates data bytes received from InputStream objects into a stream of characters.
    Question 17
    Which class stores the information about the connection between an input device and the computer or program?
    Question 18
    Which streams are by default available in a Java program?
    Question 19
    What is an exception ?
    Question 20
    When is Exception Handling required ?
    Question 21
    What is the function of catch block in exception handling ? Where does it appear in a program ?
    Question 22
    What are the advantages of exception handling ?
    Question 23
    When do use need multiple catch handlers ?
    Question 24
    Differentiate between String and StringBuffer objects.
    Question 25
    Given a package named EDU.Student, how would you import a class named Test contained in this package ? Write one line statement.
    Question 26
    There are three classes that implement the DataInput and DataOutput interfaces. Two of them are DataInputStream and DataOutputStream. Which is the third one ?
    Question 27
    What will be the output of the following code snippet when combined with suitable declarations and run ?
    Question 28
    Give the output of the following program
    Question 29
    Consider the following try .... catch block:
    Question 30
    What is the output of the following code fragment if "abc" is passed as argument to the func( ) ?
    Question 31
    Predefined classes are available in the form of _________.
    Question 32
    Name the package you need to import for performing input and output.
    Question 33
    Which command creates a package in Java?

    MCQ Section

    MCQ 1
    What is the difference between byte oriented IO and character oriented IO ? How are these two performed in Java ?
    MCQ 2
    Which class buffers the input received from an InputStreamReader object?
    MCQ 3
    Which package is by default imported in every Java program?
    MCQ 4
    Name the block that encloses the code that may encounter anomalous situations.
    MCQ 5
    In which block can you throw the exception?
    MCQ 6
    Which block traps and handles an exception?
    MCQ 7
    Can one catch block sufficiently trap and handle multiple exceptions?
    MCQ 8
    Which block is always executed no matter which exception is thrown?
    MCQ 9
    NumberFormatException is subclass of which exception class?
    MCQ 10
    IOException is subclass of which exception class?
    MCQ 11

    What is the role of
    (i) throws keyword?
    (ii) throw keyword?
    MCQ 12
    Why is exception handling necessary?
    MCQ 13
    Difference between equals() and equalsIgnoreCase() string functions?
    MCQ 14
    Difference between length() and capacity() string functions?
    MCQ 15
    The default package is a package without any name and is imported for you.
    MCQ 16
    Name the class that translates data bytes received from InputStream objects into a stream of characters.
    MCQ 17
    Which class stores the information about the connection between an input device and the computer or program?
    MCQ 18
    Which streams are by default available in a Java program?
    MCQ 19
    What is an exception ?
    MCQ 20
    When is Exception Handling required ?
    MCQ 21
    What is the function of catch block in exception handling ? Where does it appear in a program ?
    MCQ 22
    What are the advantages of exception handling ?
    MCQ 23
    When do use need multiple catch handlers ?
    MCQ 24
    Differentiate between String and StringBuffer objects.
    MCQ 25
    Given a package named EDU.Student, how would you import a class named Test contained in this package ? Write one line statement.
    MCQ 26
    There are three classes that implement the DataInput and DataOutput interfaces. Two of them are DataInputStream and DataOutputStream. Which is the third one ?
    MCQ 27
    What will be the output of the following code snippet when combined with suitable declarations and run ?
    MCQ 28
    Give the output of the following program
    MCQ 29
    Consider the following try .... catch block:
    MCQ 30
    What is the output of the following code fragment if "abc" is passed as argument to the func( ) ?
    MCQ 31
    Predefined classes are available in the form of _________.
    MCQ 32
    Name the package you need to import for performing input and output.
    MCQ 33
    Which command creates a package in Java?