mit3032 smu msc it summer 2015 IIIrd sem assignment

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PROGRAM

Master of Science in Information Technology (MSc IT)Revised Fall 2011

SEMESTER

3

SUBJECT CODE & NAME

MIT3032– Distributed Operating System

Qus:1 Explain (a) tightly coupled systems (b) loosely coupled systems.

Ans:

(a) Tightly coupled systems:

In tightly coupled systems, there is a single system wide primary memory (address space) that is shared by all the processors. If any processor writes, for example, the value 100 to the memory location x, any other

Qus:2 Write a note on Distributed Algorithms.

Ans:

Distributed Algorithms:

We know that externally synchronized clocks are also internally synchronized. That is, if each node’s clock is independently synchronized with real time, all the clocks of the system remain mutually

Qus: 3 List and explain the desirable features of a good message passing system.

Ans:

The desirable features of a good message passing system:

Desirable features of a good message passing system are:

·         Simplicity

·         Efficiency

·         Reliability

·         Correctness

·         Flexibility

·         Security

Qus:4 Explain the object locating mechanisms.

Ans:

The object locating mechanisms:

Object locating is mapping the system oriented names of objects to the location of the object. Some object locating mechanisms are listed below:

I)                   Broadcasting: Object’s location is found by broadcasting a request from the client node. Expanding ring broadcast: This approach is employed in an internetwork consisting of LANs connected

Qus:5 (a) Explain any two approaches to replication in a DFS.

(b) What is Ceph? Explain.

Ans:

(a) Explain any two approaches to replication in a DFS:

1. Explicit replication: The client explicitly writes files to multiple servers. This approach requires explicit support from the

Qus:6 (a) What is key management in cryptography? Explain.

(b) Explain the means of authentication

Ans:

(a) What is key management in cryptography? Explain.

Key management is the set of techniques and procedures supporting the establishment and maintenance of keying relationships between authorized parties.

Key management encompasses techniques and procedures supporting:

1.      Initialization

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mit3031 smu msc it summer 2015 IIIrd sem assignment

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PROGRAM Master of Science in Information Technology(MSc IT)Revised Fall 2011

SEMESTER 3

SUBJECT CODE &

NAME

MIT3031– High Speed Networks

Qus:1 Write a note on Frame Relay Networks.

Ans:

Frame Relay Networks:

The traditional approach to packet switching (X.25), used in-band signaling, and includes end-to-end and well as per-hop flow control and error control. This approach results in considerable overhead. Frame relay is a packet modetrans mission service that exploits characteristics of modern networks by

Qus:2 List and explain the advantages of virtual path connection (VPC)

Answer:

The advantages of virtual path connection (VPC):

A virtual path connection (VPC) is a bunch of VCCs share the same endpoints where all the cells flowing over all the VCCs in a single VPC are switched together. Grouping connections that share a common path over the network reduces the control costs. There are many advantages of VPC some of

Qus:3 What are issues that we need to resolve while using a mixed ATM LAN architecture? Explain.

Answer:

The issues that we need to resolve while using a mixed ATM LAN architecture:

·        Difference in protocols – In connectionless protocols like Ethernet, a station can send data packets to another station without establishing or terminating a connection. But connection-oriented protocols like ATM must first establish a connection and then terminate the connection once

Qus:4 List and explain the types of congestion.

Ans:

The types of congestion:

1.      User-generated congestion

2.      Network-generated congestion

3.      Failure-generated congestion

There are three types of

Qus:5 What are the seven timers that TCP maintains for every connection? Explain any three.

Answer:

The timers that TCP maintains for every connection:

There are seven timers that TCP maintains for every

connection and they are:

·        SYNACK timer

Qus:6 What are the advantages and disadvantages of Routing Information Protocol (RIP)?

Ans:

The advantages and disadvantages of Routing Information Protocol (RIP):

Advantages of RIP:

The advantages of RIP are:

·         It is easy to deploy. It can be implemented in a network just by enabling the protocol on every router of the network.

·         It is

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mit302 smu msc it summer 2015 IIIrd sem assignment

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PROGRAM- M.Sc IT (REVISED FALL 2012)

SEMESTER-III

SUBJECT CODE & NAME-Mit302-WEB TECHNOLOGIES

CREDIT-4

BK ID-B1547

MAX. MARKS-60

Q1. Differentiate between TCP and UDP.

Answer:

Differentiate between TCP and UDP:

TCP (Transmission Control Protocol):

The TCP corresponds to the transport layer of OSI reference

Qus:2. Describe the features of XML. What are the important rules to keep in mind about the XML declaration?

Answer:

The features of XML:

XML is popular for many features and few of them are listed here:

1.      Easy Data Exchange: In XML, data and markup are stored as text that we can configure. If we like, we can use XML editors to create XML documents but if something goes wrong we can examine and modify document directly because it’s

Qus:3. List and explain the Components of XML processor.

Answer.

Components of XML processor:

a)      Parser: Every XML processor has a parser. An XML parser converts an XML document into an XML DOM object - which can then be manipulated with a  JavaScript. The parser's job is to translate XML markup and data into a

Qus:4. Describe the procedure of fetching data from XML to HTML. Give an example.

Answer.

Procedure of fetching data from XML to HTML

The process of fetching data from an XML files to be filled in an HTML table, using DSO (Data Source Object) and JavaScript. DSO is an object that operates like a database on the client side. It will accept information that is

Qus:5. Describe five different categories of PHP Operators.

Answer.

Categories of PHP Operators:

In all programming languages, operators are used to manipulate or perform operations on variables and values. There are many operators used in PHP, so we have separated them into the following categories to make it easier to learn them all.

·         Assignment

·          

Qus:6. Write short note on ASP.

Answer.

ASP:

The page on the server called by the JavaScript is an ASP file called AJAX server page. The server file could easily be rewritten in PHP, or some other server languages. Look at the example in PHP. The source code in "getcustomer.asp" runs a query against a database, and returns the result in an HTML table:

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mit301 smu msc it summer 2015 IIIrd sem assignment

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PROGRAM Master of Science in Information Technology (MSc IT)Revised Fall 2011

SEMESTER 3

SUBJECT CODE &

NAME

MIT301– Object Oriented Analysis and Design

Qus:1 List the advantages of object oriented software development and explain.

Answer:

The advantages of object oriented software development:

The advantages of object oriented software development are:

Q2. Explain the process of software development.

Answer:

The process of software development:

A software development process or a life cycle is a disciplined approach to develop a software product. There are various models that explain the activities or tasks that happen during the

Qus: 3 List and explain the four phases of the object modeling technique.

Answer:

The four phases of the object modeling technique:

1) Analysis

2) System design

3)

Qus: 4 explain the different states of activity diagram.

Answer:

The different states of activity diagram:

Activity diagrams are special cases of state chart diagrams. An activity diagram has actions as states. It can be considered as some kind of elaborate flow diagram and has therefore some graphical

Q5.List and explain the basic categories of program errors.

Answer:

The basic categories of program errors:

There are three basic categories of program errors:

1) Syntax errors

2) Run-time errors

3) Logical

Qus: 6 what are the rules for developing usability testing?

Answer:

The rules for developing usability testing:

Collecting information about usability requires many methods to be followed. Fresh ideas can be generated by participating in focus groups rather than depending on the use cases. A mediator can

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mit204 smu msc it summer 2015 IInd sem assignment

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 [Summer 2014] ASSIGNMENT

PROGRAM - Master of Science in Information Technology (MSc IT)

SEMESTER - 2

SUBJECT CODE & NAME - MIT204– Data Communication & Networking

CREDIT – 4 BK ID - B1389 MAX. MARKS - 60

1 Write about transmission impairments.

Answer:

Analog signal consist of varying a voltage with time to represent an information steam. If the transmission media were perfectly, the receiver could receive exactly the same signal that the transmitter sent. But communication lines are usually not

2. Explain the major criteria for a Data Communication Network

Answer: The major criteria that a Data Communication Network must meet are:

Performance

3. Write a note on a) 10Base2  b) 10Base- T

Answer:

10Base2:

10BASE2 (also known as cheapernet, thin Ethernet, thinnet, and thinwire) is a variant of Ethernet that uses thin coaxial cable (RG-58A/U or similar, as opposed to the thicker RG-8 cable used in 10BASE5 networks), terminated with BNC connectors. During the mid to late 1980s this was the dominant 10 Mbit/s

4 What do you mean by congestion? Explain

Answer:

Definition: Congestion is a major problem when traffic in the network is very high.

 When too many packets are present in (a part of) the subnet, performance degrades. This situation is called

5 Explain the following

a) Class A networks

b) Class B networks [5+5] 10

Answer:

Class A networks

Each Class A network address has an 8-bit network-prefix with the highest order bit set to 0 and a seven-bit network number, followed by a 24-bit host-number. Today, it is no longer considered 'modern' to refer to a Class

6.Explain the following.

a) Open loop congestion control

b) Closed loop congestion control

Answer: Open Loop Congestion Control

• In this method, policies are used to prevent the congestion before it happens.

• Congestion control

7. List the various categories of network security problems.

Answer: Network security problems can be divided roughly into four categories:

1) Secrecy:

 2) Authentication

3) Non-repudiation

4) Integrity control

1) Secrecy: It is also called confidentially. It has to do with keeping information out of hands of unauthorised users.

2) Authentication: It deals with determining who the destination or recipient is before revealing

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