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Spring
2016
Bca4020
1 Explain any
five features of Java.
Answer: Features of Java
Java defines data as objects with methods
that support the objects. Java is purely object-oriented and provides abstraction,
encapsulation, inheritance and polymorphism. Even the most basic program has
2 Describe main
() method in Java. What are the rules for writing a main () method?
Answer: In a Java application, you
may have many classes. Within those classes, you may have many methods. The
method that you need to execute first
3 Differentiate
between packages and Interfaces.
Answer: To create a package is quite easy: simply include a
package command as the first statement in a Java source file. Any classes
declared within that file will belong to the specified package. The package statement
defines a name space in which classes are stored. If you omit the
4 How we can
search the first and last occurrence of a substring?
Answer: The String class provides
two methods that allow you to search a string for a specified character or substring:
• indexOf( ) Searches for the first
occurrence of a character or substring.
• lastIndexOf
5 Compare JDBC
and ODBC.
Answer: JAVA Data Base Connectivity (JDBC)
The JDBC API (Java Data Base Connectivity
Application Program Interface) can access any kind of tabular data, especially
data stored in a Relational Database. It works on top of ODBC (Open Data
6 Describe
about:
a) Swing
b) JFC
Answer: a) Swing is the
next-generation GUI toolkit that Sun Microsystems created to enable enterprise development
in Java. By enterprise development, we mean that programmers can use Swing to create
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