CUSTOMER_CODE
SMUDE
DIVISION_CODE
SMUDE
EVENT_CODE
JAN2016
ASSESSMENT_CODE MIT103_JAN2016
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
12944
QUESTION_TEXT
List and explain the various features of Java.
The various features of Java are:
•Simple
•Secure
•Portable
•Object-oriented
•Robust
SCHEME OF EVALUATION •Multithreaded
•Architecture – neutral
•Interpreted
•High performance
•Distributed
•Dynamic
Brief explanation of each feature (any 10) Marks: 1x10=10
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
12948
QUESTION_TEXT
Explain Remote Method Invocation in detail.
SCHEME OF
EVALUATION
Explanation should include the following:
•RMI allows objects in different Java Virtual Machines belonging to
different hosts to send and receive message.
• Local objects are objects that execute on the local machine
• Remote objects are objects that execute on all the other machines.
•Objects on remote hosts are exported so that they can be invoked
remotely.
•An object exports itself by registering itself with a Remote Registry
Server. It is a service that runs on a server and helps the objects on other
hosts to remotely access its registered objects.
•Objects that are exported for remote access must implement the
interface RemoteInterface
•Java’s RMI approach makes use of stubs and skeletons. A stub is a
local object on the client’s machine that acts as a proxy for a remote
object. The skeleton is the proxy of the client machine’s object that is
located on the remote host.
•The stub the skeleton communicates through a remote reference layer.
RMI uses the TCP protocol for transporting information.
(Marks: 10)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
72590
QUESTION_TEXT
What is inheritance? Explain the types of relationships supported in
Java inheritance with example.
Inheritance is one of the cornerstones of object-oriented programming,
because it allows the creation of hierarchical classifications. Using
inheritance, you can create a general class that defines traits common
to a set of related items. This class can then be inherited by other, more
specific classes, each adding those things that are unique to it. In the
terminology of Java, a class that is inherited is called a superclass. The
class that does the inheriting is called a subclass. Therefore, a subclass
is a specialized version of a superclass. It inherits all of the instance
variables and methods defined by the superclass and add its own,
unique elements. (1 mark)
Types of Relationships
Relationships are classified as follows:
SCHEME OF
EVALUATION

A Kind-Of relationship

A Is-A relationship

A Part-Of-relationship

A Has-A relationship
(For each point with explanation and example – 2 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
120580
QUESTION_TEXT
Explain the different data types available in java programming
language.
Primitive Data types:
SCHEME OF
EVALUATION
1.
byte
2.
short
3.
int
4.
long
5.
float
6.
double
7.
char
8.
boolen
Abstract/Derived Data Types:
1.
String
(10 Marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
120582
QUESTION_TEXT
What is Java IDL? Explain.
1.
Java IDL is a technology for distributed objects – i.e. objects
interacting on different platform across a network. IDL stands for
Interface Definition Language.
SCHEME OF
EVALUATION
2.
Java IDL is similar to RMI, which supports distributed objects
written entirely in the Java programming language.
However, Java IDL enable objects interact regardless of whether they’re
written in the Java programming language or another language such as
C, C++, COBOL or others.
3.
Java IDL is based on the Common Object Request Brokerage
Architecture, an industry standard distributed object model.
4.
A key feature of CORBA is IDL, a language –neutral Interface
Definition Language. Each language that supports CORBA has its own
IDL mapping and as its name implies, Java IDL supports the mapping
for Java. CORBA and the IDL mappings are the work of an industry
consortium known as the OMG or Object Management Group.
5.
TO support interaction between objects in separate programs Java
IDL provides an Object Request Broker, or ORB. The Orb is a class
library that enables low level communication between Java IDL
applications and other CORBA compliant applications.
(10 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
120583
Write a note on following, give example for each
QUESTION_TEXT
a.
Break statement
b.
Continue statement
a.
Break statement:
By using break, you can force immediate termination of loop, bypassing the
conditional expression and any remaining code in the body of the loop. When
a break statement is encountered inside a loop, the loop is terminated and
program control resumes at the next statement following the loop. (3 marks)
Ex:
SCHEME OF
EVALUATION
//Using break to exit a loop
class BreakLoop{
public static void main(String args[ ]) {
for(int i=0; i<100; i++){
if(I == 10) break; // terminate loop if i is 10
system.out.println(“Loop complete.”);
}
} (2 marks)
b.
Continue statement:
sometimes it is useful to force an early iteration of a loop. that is, you might
want to continue running the loop, but stop processing the remainder of the
code in its body for this particular iteration…..(3 marks)
ex:
//Demonstrate continue.
class Continue{
public static void main (String args[ ]) {
for (int i=0; i<10; i++) {
System.out.print (i+ “ “);
if (i%2 == 0) continue;
Sytem.out.println(“”);
}
}
}
(2 marks)