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ASSIGNMENT DRIVE - SPRING 2018

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

SEMESTER - 2

SUBJECT CODE & NAME - MIT206 – OPERATING SYSTEM

Assignment Set - 1 Questions

Q1 Discuss in detail the process control block.
Answer:
While creating a process the operating system performs several operations. To identify these
process, it must identify each process, hence it assigns a process identification number (PID) to
each process. As the operating system supports multi-programming, it needs to keep track of the
all the processes. For this task, the process control block (PCB) is used to track the process’s
execution status.

Q2 Explain the priority CPU scheduling algorithm with example. Write the
disadvantages associated with this algorithm
Answer:
Priority Based Scheduling
 Priority


Q3 Discuss Interprocess Communication. 10
Answer:-
Communication of co-operating processes’ shared-memory environment requires that these processes
share a common buffer pool, and that the code for implementing the buffer be explicitly written by the
application programmer. Another way to achieve the same effect is for the operating system to provide the
means for co-operating

Assignment Set - 2 Questions
Q1 Explain the following page replacement algorithm:
(a) Optimal
(b) LRU 5+5 10
Answer:-

a)
 Optimal Page replacement –
In this algorithm, pages are replaced which are not used for the longest duration of time in the
future.
Let us consider page reference string 7 0 1 2 0 3 0 4 2 3 0 3 2 and 4 page slots.
Initially all
Q2 Compare Daisy chain bus arbitration and Priority encoded bus arbitration. 5+5 10
Answer:-
Daisy chain arbitration:
Here, the requesting device or devices assert the signal bus_request. The bus arbiter returns the bus_grant
signal, which passes through each of the devices which can have access to the bus, as shown in figure below.
Here, the

Q3 List and explain different types of multiprocessor operating systems. 1+9 10

Answer:-
Three basic types of multiprocessor operating systems are:
 Separate supervisors
 Master / slave
 Symmetric

Separate supervisors
In separate

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DRIVE
SPRING 2018
PROGRAM

Master of Science in Information Technology(MSc IT)

SEMESTER
2

SUBJECT CODE & NAME

MIT207– Data Base Management System(DBMS)

Assignment Set - 1

1 Describe various types of attribute with reference to E-R model with suitable example.
Answer: The entity-relationship (E-R) data model based on a perception of real world that consists
of a set of basic objects called entities, and of relationships among these objects. It was developed to
facilitate database design by allowing the specification of an enterprise schema, which represents
the
2 What is database manager? Mention and describe the important responsibilities of
database manager
Answer: A database manager is a program module which provides the interface between the low
level data stored in the database and the application programs and queries submitted to the system.
It is responsible for interfacing with file system. One of the functions of database manager is to
convert user's

3 Define catalog. What information is stored in the system catalogs?
Answer: A fundamental property of a database system is that it maintains a description of all the
data that it contains. A relational DBMS maintains information about every relation and index that it
contains. The DBMS also maintains information about views, for which no tuples are stored
explicitly; rather, a definition of the view is stored and used to compute the tuples that belong in the
view when the

Assignment Set - 2

1 Explain the following normal forms:
(a) 2 NF
(b) 3 NF
Answer:

Normalization is a database design technique which organizes tables in a manner that
reduces redundancy and dependency of data.
It divides

2 List and explain the basic operations of Relational algebra.
Answer:
These are basic operator of relational algebra:
 Union ()
 Difference ( - )
 Intersection ()
 Cartesian Product (x)
Union ()
If we assume that P and Q are two union-compatible relations, then the union of P and Q is set-
theoretic union of P and Q.
The resultant relation, R = P U Q, has tuples drawn from P and Q such that
R = { t | P v t  Q }
3 Describe data distribution on the basis of benefits and drawbacks.
Answer: Benefits of Data Distribution
Data sharing and Distributed Control: If a number of different sites are connected to each other,
then a user at one site may be able to access data that is available at another site. For example, in
the distributed banking system, it is possible for a user in one branch to access data in another
branch. Without this

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