Fall 2014 ASSIGNMENT
PROGRAM MCA(REVISED FALL 2012)
SEMESTER - 2
SUBJECT CODE & NAME - PROGRAM MCA(REVISED FALL 2012)
CREDIT – 4 BK ID - B1405, MAX. MARKS - 60
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Q1. Differentiate between Distributed Systems and Real-time Systems. 5+5
Answer:
Distributed Systems
In this type of system all the computations are distributed among several processors. Distributed systems are also referred as loosely coupled systems because here the processors do not share memory or a clock.
Q2 Explain the different process states. 5*2
Answer.
Different process states
A program in execution is a process. A process is executed sequentially, one instruction at a time. A program is a passive entity.
Q3 Define Deadlock. Explain necessary conditions for deadlock. 2+(2*4)
Answer.
Deadlock
Deadlock occurs when we have a set of processes [not necessarily all the processes in the system], each holding some resources, each requesting some resources, and none of them is able to obtain what it needs, i.e. to make progress. We will usually reason in terms of resources R1, R2... Rm and processes P1, P2... Pn. A process Pi that is waiting for some currently unavailable resource is said to be blocked.
Q4 Differentiate between Sequential access and Direct access methods. 5+5
Answer.
Sequential access and Direct access methods
Sequential access
In this simple access method, information in a file is accessed sequentially one record after another. To process the ith record all the i-1 records previous to i must be accessed. Sequential access is based on the tape model that is inherently a sequential access device. Sequential access is best suited where most of the records in a file are to be processed. For example, transaction files.
Q5 Differentiate between Daisy chain bus arbitration and Priority encoded bus arbitration. 5+5
Answer.
Daisy chain bus arbitration and Priority encoded bus arbitration
There are many ways of addressing the “bus arbitration” problem; three techniques which are often implemented in processor systems are the following: Daisy chain arbitration, priority encoded arbitration and distributed arbitration by self-section. These are also often used to determine the
Q6 Differentiate between encryption and decryption. What are the two basic methods for encryption? 5+5
Answer.
Encryption and Decryption
Encryption is an important tool in protection, security and authentication. The process involves two steps (as in Fig 6.a): :
· Encryption: the original
Get fully solved assignment, plz drop a mail with your sub code
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Charges for mba rs 125/subject and rs 700/semester only.
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