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(SPRING 2014) ASSIGNMENT
DRIVE WINETR SPRING 2014
PROGRAM BSc IT
SUBJECT CODE & NAME BT0074 - OOP with JAVA
SEMESTER Third
BK ID B1005
CREDITS 4
MARKS 60
1. Explain any ten features or buzzwords of java programming language.
Answer : Java is born with some unique and interesting features that made it most powerful and
demanded language of the times. Following are the features of Java.
1) Portable
Portability for Java comes from its bytecode. A Java .class file, obtained from the compilation
on one platform can be ported or carried, for execution, to a different platform. The
necessity is to have a compatible JVM (specific to the platform). JDKs are different for
different platforms.
2.Describe the syntax and working of if-else with an example. Also write a program in java that
assigns a grade based on the value of a test score: an A for a score of 90% or above, a B for a score
of 80% or above, and so on.
Answer : General if..else syntax is as follows:
if ( condition ) {
expr_set1;
}

2. 3. List and explain all the string comparison functions. Write a program in java to reverse a string.
Answer : String comparison functions
Function Description
addcslashes() Returns a string with backslashes in front of the specified characters
addslashes() Returns a string with backslashes in front of predefined characters
bin2hex() Converts a string of ASCII characters to hexadecimal values
4. Describe the try block and nested try statement – the technique of handling exception in java.
Explain with the help of a program.
Answer : The first step in constructing an exception handler is to enclose the code that might throw
an exception within a try block. In general, a try block looks like the following:
try {
code
}
catch and finally blocks . . .
The segment in the example labeled code contains one or more legal lines of code that could throw
an exception. (The catch and finally blocks are explained in the next two subsections.)
5. Write a note on random access files and serialization in java.
Answer : Random Access Files
Random access files permit nonsequential, or random, access to a file's contents. To access a file
randomly, you open the file, seek a particular location, and read from or write to that file.
This functionality is possible with the SeekableByteChannel interface. The SeekableByteChannel
interface extends channel I/O with the notion of a current position. Methods enable you to set or
query the position, and you can then read the data from, or write the data to, that location. The API
consists of a few, easy to use, methods:
6.Define and explain JDBC. Draw and explain JDBC application architecture.
Answer : JDBC Architecture
The JDBC API supports both two-tier and three-tier processing models for database access.
Figure 1: Two-tier Architecture for Data Access.

3. The DBMS-proprietary protocol provides two-way communication between the client machine and
the database server
In the two-tier model, a Java application talks directly to the data source. This requires a JDBC driver
that can communicate with the particular data source being accessed. A user's commands are
delivered to the
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