Middleware Interview Questions

Middleware Technologies

UNIT I

1. What is Client/Server?
Client : The client hardware is the desktop machine that runs client software. It could be a micro
or a workstation. The client software formulates data request and passes the request to the
network software. This software sends the request to the server, accepts the result from the server
and passes the request back to the client software.
Server : A server is the machine that runs data management software that has been designed for
server functionality. A server has operating system software, data management software and a
portion of the network software.

2. Define File server.
File Server : File servers manage a work group’s applications and data files, so that they may
be shared by the group. File servers are very I/O oriented. They pull large amounts of data
off their storage subsystems and pass the data over the network. When the data from the file
is requested, a file server transmit all records from the file.

3. What are the Service Specific middleware available?
1. ODBC : Open database connectivity is a windows technology that lets a database
client application connect to a external database. To use ODBC, the database
vendor must provide an ODBC driver for data access.
2. HTTP : Hyper Text Transfer Protocol is the underlying protocol used by the
world wide web. HTTP defines how messages are formatted and transmitted and
what action web servers and browsers should take in response to various
commands. HTTP only supports transmission of text.

4. Define the services provided by Web server.
Web server : A webserver is a computer system that delivers web pages. Every web server
has an IP address and possibly a domain name. for example an URL:
http://www.niceindia.com/index.html in our browser. This sends a request to the server
whose domain name is niceindia.com. the server fetches the page named index.html and
sends back to our browsers.

5. Define TCP/IP and IPx/SPx.
TCP/IP : Transfer control Protocol and Internet Protocol.


6. What is Remote Procedure Call?
Remote Procedure Call (RPC): One of the earliest facilities that was created to help programmers
write client/server software is known generically as a Remote Procedure Call mechanism. When
implementing a program, the programmer uses procedures to keep the code manageable. Instead
of defining a single, large procedure that performs many tasks, the programmer divides the tasks
into sets and uses shorter procedure to handle each set. A client procedure process calls a
function on a remote server and suspends itself until it gets back the result. This process that
issues the calls and waits until it gets the result is called remote procedure call.

BDV-879698-BDV