Java Programming

(b) Write a Java class called as SavingsAccount with members as AccountNo and balance. Provide depositAmount() & withdrawAmount() functions. If user tries to withdraw more money than his balance, then throw a User Defined Exception. 

(a) What is a private constructor? How we can create the object of the class having private constructor from other class.

What are symbolic constants? What are their advantages?

What are the different data types in java? Give the size of each.

What is decision making in java?

What is switch statement? Write an example program to illustrate.

What is counter controlled while loop? What is sentinel controlled loop?

What are nested loops? Write an example program to illustrate it.

List all the methods of String class. Give the use of each with appropriate examples.

Write a program to create a 2-dimensional array and display its elements one by one.

List all the methods of Character class. Give the uses of each with examples.

What is assertion? What are checked and unchecked exceptions?

Write a program to write to a binary file.

List all the methods of File class.

Give the inheritance hierarchy of Java AWT and Swing classes.

What is event driven programming?

Explain any ton of the following briefly

a) What is the role of JRE?

b) What is the use of finalize() method?

c) What is constructor overloading?

d) What is the role or priority in multithreading programmring?

e) What I/O classes can be used to take input from keyboard in java programs.

f) What is user defined exception? How is it credit?

g) What is an inner class?

h) Write any five methods of Scrollbar class..

i) What is the use of AWT package?

j) Differentiate TCP and UDP.

k) What is the use of loetAddress class?

l) What is the DriverManager class in JDBC? 

a) Explain interface with example. Write down its advantages.

b) What is array? Write syntax to create irregular two dimensional array? Give suitable example.

c) Write a java application that takes an integer number as input from command line and computes the sum of digits and number of digits.

a) What are the usages of this" and "super" keywords?

b) Explain Abstract class in java? What is the advantage of abstract class? Give suitable example.

c) Explain instance variable hiding with suitable example.

a) Explain any 5 string methods with syntax.

b) What is Exception? What is the difference between checked and unchocked exception? Write a program to demonstrate exception handling is java with example.

a) Explain Thread life cycle. Write a program that have two threads where one thread print table of 5 and other thread print 2 string 10 times

b) What a note of byte stream I/O classes and character stream I/O classes in java.

a) Write an applet to create moving banner.

b) What is Swing? Write down the features of swing Compare applet and swing.

a) Explain applet life cycle. Write an applet to change background color of applet using 3 scrollars representing colors red, green and blue respectively. 

b) Explain Delegation Event Model in detail. Discuss my five events and listeners to handle those events.

a) Write short notes on following:

1) InetAddress class and its factory methods :

2) Servlet Life Cycle 

b) Write a java application to connect to database table emp (id, name, design) and display all records of table.

a) Write a Servlet to display the current date and time.

b) What is JDBC? Explain all JDBC drivers and their features. What are the advantages of JDBC?

(c) List and explain the OOP principles.

(a) Explain the concept of abstract classes in Java.

(b) What is a Package? Discuss with suitable example the steps involved in creating and using packages.

(a) What are interfaces? What are their benefits? Give the general form of a class that implements interfaces.

(a) Explain the different ways of creating threads in java with syntax.

(b) How shared object can be protected from multiple access of threads?

(a) Bring out the differences between AWT and Swings using suitable example.

(b) Discus various layout managers available in AWT.

(a) Write a program  to illustrate BufferedInputStream and BufferedOutputStream.

(b) Compare byte stream class and character stream class.

Answer the following: -

(a) What is type casting? llustrate with example what is meant by Automatic type promotion.

Answer the following: -

(b) What is delegation event model?

Answer the following: -

c) Discuss the uses of 'throw' and 'throws' keywords

Answer the following: -

(d) Explain the different uses of 'super' keyword.

Answer the following:-

(e) Explain the lifecycle of an applet.

(a) Explain why the main function is declared as "public static void main(String args[])"? 

(b) List and explain any 8 Java buzzwords.

Write short note on:

(a) JDBC architecture

Write short note on:

(b) Adapter classes

Write short note on:

(c) Applets and comparison with application program

Write short note on:

(d) Check box and choice list

Answer the following questions:

(a) How can we pass parameters to an applet?

(b) What is the role of layout manager in AWT orswing?

(c) Can applet class have a constructor? Justify your answer.

(d) What is the What is the purpose of the jar tool?

(e) What is the difference between Integer and int?

(f) Why is it illegal for static method to invoke a non-static method?

(g) What do you understand by daemon thread.

(h) State the uses of 'super' keyword with an example.

(i) Write a note on inner classes.

(j) What do you understand by garbage collection in java? 

(a) What is the difference between equality of objects and equality of references that refer to them? 

(b) Write an application that computes the value of following expression 'exp' using the formula: exp = 1+x/1! + x2/2! + x3/3! +....

(a) What is the role of priorities in multithreading. What are its limitations?Explain with the help of an example how to set and get priority values for threads in Java.

(b) What do you understand by inter-thread communication in java?

(c) What is the role of stack in exception handling?

(a) Write a java program to accept two file names as command line argument. Copy only those lines from the first file to second which contains the work 'computer' .

(b) Discuss in detail throw' and 'throws' keywords.

(a) Explain in brief Java's event handling mechanism with the help of an example.

(b) What is a container? Explain how components are added to a container. What is a default layout of an applet? How can you change it?

(c) List the methods under Window Listener Interface.

(a) Swing components are lightweight components. Comment.

(b) What is a String Buffer class and how does it differ from String class?

(c) Why do we need both run() and start() methods in multithreading? Can we achieve it with only run() method? Explain. 

(a) Explain in detail various input and output streams and their corresponding classes in Java

b) Explain the life cycle of an applet.

Write notes on the following:

(a Interfaces 

 (b) Adapter classes 

 (c) Life cycle of Java Servlet                 (d) Checked Exceptions

(b) Explain the logical operator (& & and l l) with example. 

(a) What is a constructor? Write the program to pass the values to the base class constructor form the sub class. 

(b) Explain different access modifiers available in Java.

(a) Differentiate between checked and unchecked Exception. Give four examples of each type.

b) Explain the life cycle of Thread. Describe any five methods from thread class. .

(a) Write the program to count the number of words in file.

(b) Why String class objects are considered as immutable. Differentiate between length property and length ( ) method with example.

(a) What is layout manager? Explain any three layout managers in Java. Which method is used to set the layout manager? 

(b) Write a program to print the table of any number inside the applet.

(a) Explain the two predefined stream variables in and out.

(b) Differentiate between ODBC and JDBC.

(a) Explain the InetAddress class. Write the program to find the IP address of any website using the methods of InetAddress class. 

(b) Explain client server communication using sockets. Discuss the use of Server Socket and Socket Class in Java. 

Explain following in brief:- 

(a) Explain in detail the features of Java.

Explain following in brief:- 

(b) How a multidimensional array is represented in Java? Write the program to create a 2 * 2 array. 

Explain following in brief:- 

(c) Differentiate between Socket and Port.

Explain following in brief:- 

(d) How multithreading is achieved in Java programs. Discuss its advantages and disadvantages.

Explain following in brief:- 

(e) Differentiate between Swings and Applets.

Explain following in brief:- 

(f) How the constructor is overloaded in Java?

 (a) Discuss all the three usages of final keyword?

(b) How can we pass parameters to an applet?

(c) What is the difference between int and Integer?

(d) Differentiate between adapter and inner classes.

What is Driver Manager class in JDBC?

What is the use of this and super Keyword?

 What do you mean by Daemon thread? How can you set priority of a thread? 

How is method overloading different from method overriding? Explain with the  help of suitable code

What is a constructor? Does Java provide default constructor? Explain your answer with suitable example, in far with suitable example.

What is inheritance? Explain different types of inheritance in Java with sultable diagram and small segment of codes. 

What are cookies? Are they good or bad? Justify.

Explain the life cycle of a thread. Discuss the process of thread synchronizator with the heln of appropriate code. 

Explain any 5 String class methods in detall.

Differentiate between checked and unchecked exceptions. Write a program to demonstrate the concept of user defined exceptions.

Write a program to copy contents of one file to another.

What is delegation event model? Write program to explain keyboard event  handling. 

Differentiate between swing and AWT.

Write a program to change background color of applet using three scrollbars representing red, green and blue? 

 Write short notes on InetAddress class and its factory methods.

What is JDBC? Explain all JDBC drivers in detail.

Write a servlet to display current date and time.