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Fall 2018 ASS IGNMENT

PROGRAM BCA (REVISED FALL 2012)

SEMESTER 3

SUBJECT CODE &

NAME

BCA311 -COMPUTER ORIENTED NUMERICAL METHODS

CREDIT 4

BK ID

B1643

Q.1. Find a real root of the transcendental equation cos x-3x+1=0, correct to four decimal places using iteration method.

Solution.

Let f(x) = cos x – 3x + 1.

Now f(0) = cos 0 – 0 + 1 = 2 >

Q.2. Find the Taylors Series for f(x)=x³-10x²+6 about x₀=3

Solution.

We know that Taylor's series expansion of function

Q.3. Solve the equations

2x + 3y + z = 9

x + 2y + 3z = 6

3x + y + 2z = 8

by LU decomposition method.

Solution.

We have,

Q.4. Fit a second degree parabola y = a + bx + cx² in the least square method for the following data and hence estimate y at x = 6.

X	1	2	3	4	5
Y	10	12	13	16	19

Solution.

Let us choose, X=x-3, we have y'= (∑y)/n =70/5=14

and let Y =

Q.5. The population of a certain town is shown in the following table

Year X	1931	1941	1951	1961	1971
Population Y	40.62	60.80	79.95	103.56	132.65

Find the rate of growth of the population in 1961.

Solution.

Here h = 10. Since

Q.6. Solve of 𝑦_𝑛₊₂- 2 𝐶𝑜𝑠 𝛼 𝑦_𝑛₊₁+ 𝑦_𝑛= 𝐶𝑜𝑠 𝛼𝑛.

Solution.

The given difference equation can be

Complete Smu assignments available in rs 125 per assignment only

PROGRAM - BCA (Revised Fall 2012)

SEMESTER - 3

SUBJECT CODE & NAME

BCA312 – Data Base Management System(DBMS)

CREDIT - 4

BK ID - B1479

MAX. MARKS – 60

SET 1

Q.1 What are the mapping cardinality for a binary relationship set R between entity sets A and B? 10

Answer-

The mapping cardinality of a relationship indicates the number of instances in entity E1 that can or must be associated with instances in entity E2:

a) One-One Relationship. For each entity instance in one entity there is at most one associated entity instance in the

Q2. What is a table in relational data model? List the properties of relational tables. [10]

Ans:

Relational Data Model:

The relational model today, is the primary data model for commercial data processing applications. It has attained its primary position because of its

simplicity, which eases the job of

Q.3 Write short notes on : (i) Cache (ii) Main Memory (iii) Flash Memory (iv) Magnetic Disk storage (v) Optical Storage. 2x5

Answer- Several types of data storage exist in most computer systems. These storage media are classified by the speed with which data can be accessed, by the cost per unit of data to buy the medium, and by the medium’s

SET - 2

Q.1 Explain Primary Key and Foreign Key.

Answer-

A Relational Database Management System (RDBMS) provides a comprehensive and integrated approach to information management. A relational model provides the basis for a relational database. A relational model

Q2. What is view? List its advantages. [4+6]= 10

Ans:

Views:

A view is a virtual table which does not actually exist. It is made up of a query on other tables in the database. It could include only certain columns or rows from a table or from many tables. A view which restricts the user to certain rows is called a horizontal view, and a vertical view restricts the user to certain

Q3. Write a note on the following: 5+5

a) SUBSET Mapping

b) SUPERSET Mapping

Ans: Classes of OOP language can be mapped to RDBMS tables. For e.g. JAVA classes can be mapped to RDBMS tables. We can map a persistent class and a table in so many ways. The simplest mapping between a persistent class and a table is one-to-one. In this case, all attributes in the persistent class are represented by all columns of a table. Each instance of a business class is then stored in a row of the table. Although this type of mapping is straightforward, it might conflict with the existing object

Complete Smu assignments available in rs 125 per assignment only

PROGRAM - BCA(REVISED FALL 2012)

SEMESTER - 3

SUBJECT CODE & NAME

BCA313 -UNDERSTANDING PC & TROUBLE SHOOTING

CREDIT - 4

BK ID - B1416

MAX. MARKS – 60

SET 1

Q1. What is POST? What are the various steps performed by the POST to check for resource availability? [2+8] = 10

Ans: Power-On-Self-Test (POST): Power-On-Self-Test is a routine that is run to ensure that all the components and functions of the computer are working correctly to start the computer successfully. The POST only checks the system for

Q2. How do you to take decision on whether to replace or repair the Motherboard? Explain [10]

Ans: Take decision on whether to replace or repair the Motherboard: When any key component of the motherboard fails or shows problem in its working you will be faced with the question of either replacing that particular component with a spare or to change the whole motherboard and replace it with a new one. You might assume that it is comfortable to change the components and replace them. But when it comes to the

Q3. How do you rectify the BUS errors? List out points one should consider while connecting Bus to the various components. [4+6] =10

Ans: rectify the Bus errors:

· You can use the multi-meter to check the voltage level in the Bus. Irrespective of low voltage or standard Bus you have to find the -12 volt dc and +5 volt dc. You should ensure that a low voltage Bus should have +3.3 Volt dc. Otherwise, you need to conclude that there is fault in the Bus and need to

SET 2

Q1. Write the instructions one should follow while installing the new Motherboard. [10]

Ans: Installing the new motherboard: Now your system is ready for installing the new motherboard. A little effort is required to see that the motherboard fit inside the system and work properly. You must follow the instructions given below to place your motherboard inside the system. Place the motherboard gently inside the system and ensure that the slots and ports are properly aligned. You need to check that the holes from the

Q2. Discuss any five guidelines that we need to follow while troubleshooting the hardware problem. [10]

Ans: Troubleshooting: Usually USB problems are not severe. But still there are few steps which can control these small problems such as hardware failure, device driver’s configuration problems, cabling problems, firmware/BIOS problems, Root hub configuration problems, etc. The steps are as follows:

· Hardware failures or Configuration problems: There may be some hardware problems such as high or low power, limited bandwidth, malfunctioning, etc. In this case, make sure that the root is working properly through

Q3. How do you solve of problem if you don't hear anything from the sound card? [10]

Ans: Sound Card Problems:

No Sound: You could consider the following solutions if you don't hear anything from the sound card:

· Ensure that the sound card is set in such a way that it uses all default resources, and that other devices using these resources are either changed or removed.

· Are the speakers connected? Check that the speakers are plugged into the sound card's Stereo Line Out or speaker

Complete Smu assignments available in rs 125 per assignment only

PROGRAM - BCA(REVISED FALL 2012)

SEMESTER - 3

SUBJECT CODE & NAME

BCA 314 – DATA COMMUNICATION

BK ID - B1644

CREDITS - 4

MAXIMUM MARKS – 60

SET 1

Q1. What is Channelization? Briefly explain three channelization techniques. [2+8] = 10

Ans: Channelization: Channelization is a multiple-access method in which the available

bandwidth of a link is

Q2. What is modulation? Explain why modulation is required? [5+5] = 10

Ans: Modulation: Modulation is the process of varying one of characteristics (either

amplitude or frequency or phase) of a high-frequency periodic waveform, called the carrier signal, with a modulating signal which

Q3. Write a note on: [5+5] 10

· Ground Wave Propagation

· Sky Wave Propagation

Ans: Ground Wave Propagation: Ground wave propagation follows the curvature of the Earth. Ground waves have carrier frequencies up to 2 MHz. AM radio is an example of ground wave propagation. Figure shows the concept of Ground wave

SET 2

Q1. Briefly explain Nyquist theorem with mathematical representation. [10]

Ans: Nyquist theorem: The Nyquist theorem states that “a signal must be sampled at least twice as fast as the bandwidth of the signal to accurately reconstruct the waveform” In other words, the sampling frequency should be at least twice the highest frequency contained in the signal. It is mathematically

Q2. What is Communication System? Briefly explain the important elements of communication system. [4+6] = 10

Ans: Communication: Basically, communication is the process of conveying a message from one person to other or from one place to another place. It is the exchange of ideas, thoughts and feelings between two persons, places or points.

Communication Systems: Communication System is a system or facility capable of providing

information

Q3. What are the advantages of packet switching over circuit switching? [10]

Ans: Packet switching: In packet switching message is divided into blocks of data called packets.

Each packet is associated with a header before they are transmitted individually through the network. The path taken by each packet to reach their respective destination is depending on the status of links used by switching equipment. The packet-switching network is a distributed

Complete Smu assignments available in rs 125 per assignment only

PROGRAM - BCA(REVISED FALL 2012)

SEMESTER - 3

SUBJECT CODE & NAME

BCA 315– Soft Skill - Personality Development

BK ID - B0726

CREDITS - 2

MAXIMUM MARKS – 30

SET 1

Q1. Discuss the concept and applications of time management and explain recognizing the importance of time. [5+5] = 10

Ans: Concept and Applications of Time Management: Time management is a set of skills, tools, and systems that help you use your time to accomplish what you want in an efficient way. Time is often equated with money, and just as we often find ourselves short of cash, we also find ourselves with short of time. The various applications of Time

Q2. Explain personality. Name its different categories. [5+5] = 10

Ans: Personality – An Explanation: When we talk of personality, we don't mean a person who has charm, a positive attitude towards life, a smiling face, or who has won a beauty contest. When psychologists talk of personality, they mean a dynamic concept describing the growth and development of a person's whole psychological system. The word 'personality' has interesting etymological origins. It can be traced to the Latin

Q3. Discuss the Role and Functions of a good leader. [10]

Ans: Role & Functions of a Good Leader: The overall aim of a leader is to achieve the task with the help of his group. To meet the overall aim, the leader has three main objectives :

· To gain the commitment and cooperation of his team

Complete Smu assignments available in rs 125 per assignment only

smu mba 2021 exam solved Assignment support available. plz visit website

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Friday 1 February 2019

bca 3 sem fall 2018 solved assignment jan/feb 2019 exam

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