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Question:
(a) Java does not support multiple inheritance but does provide the concept of ‘interface'. Explain how interfaces can help a programmer to implement multiple inheritance in their programs. Explain with suitable Java examples.
(b) What is an abstract class in Java? Describe the importance of implementing these classes in programs. Illustrate with an example of your own.
(c) Show the Java approach to event processing by explaining how event handling works in Java. Use an example to support your answer.
(d) Describe what is a ‘Listener' in Java using an appropriate example?
Explain the following terms declaring, Allocating and initializing two dimensional array? Two dimensional arrays are declared, allocated and initialized much such as one dimens
What are the List interface and its main implementation? List helps in collections of objects. Lists may include duplicate elements. Main implementations of List interface are
How can I create a simple Caesar cipher using if-else statements?
Explain the term Naming Packages in details? As you saw previously name space conflicts arise if two pieces of code declare the similar name. Java remains track of what belongs
calculator
What are wrapper classes? Java gives specialized classes corresponding to every of the primitive data types. These are known as wrapper classes. They are example: Integer, C
What is the use of Wrapper class You can create an object of Wrapper class using a String or a primitive data type Integer num = new Integer (4); or Integer num = n
How can I improve the performance of a java application , describe the java optimization techniques?
Differentiate Local and Global Variables? Local variables are the variables have limited scope although global have bigger scope Local variables are not accessed through others
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