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Spring 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.
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 at point x0 is
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 = y –
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 the rate of growth of population is dy/dx, we have to find dy/dx
at x= 1961, which lies
Q.6. Solve of π¦π+2- 2 πΆππ πΌ π¦π+1+ π¦π= πΆππ πΌπ.
Solution.
The given difference equation can be written
as
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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
Q1.
List and explain the important responsibilities of database manager. [10]
Ans: Important responsibilities
of database manager:
important responsibilities of Database manager:
·
Interaction
with file manager: The
raw data is stored on the disk using the file system which is usually provided
by a conventional operating system. The database manager translates the various
DML statements into low-level file system commands. Thus the database manager
is responsible for the actual
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 dataprocessing
applications. It has attained its primary position because of its
simplicity,
which eases the job of the programmer, as compared to earlier data models such
as the network model or the hierarchical
Q3.
What is data independence? Briefly explain. [10]
Ans: Data Independence: Data
independence is usually considered from two points of view: physical data
independence and logical data independence. Physical data independence
allows changes in the physical storage devices or organization of the
files to be made without requiring changes in the conceptual view or any
of the external views and hence in the application programs using the
database. Thus, the files may migrate from one type of physical media to
another or the file structure may change without any need
Set2
Q1.
Explain the Sequential File Organization with the help of diagrams. [10]
Ans: Sequential File Organization: A sequential file is designed for efficient
processing of records in sorted order based on some search-key. A search
key is any attribute or set of attributes; it need not be the
primary key, or even a superkey. To permit fast retrieval of records in
search-key order, we chain together records by pointers. The pointer in
each record points to the next record in search-key order. Furthermore,
to minimize the number of block accesses in sequential file processing,
we store records physically in search-key
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 columns. You
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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 availability of resources; however, POST also manages the
initialization of computer system
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
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
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
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 the Device Manager. If you find an exclamation mark in a yellow circle
or
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
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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 shared in time, frequency, or through code, between different
stations. In this section, we discuss three channelization techniques: FDMA,
TDMA, and CDMA.
1
Frequency-Division Multiple
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
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
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 represented
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.
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
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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
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 word
"
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
·
To
get
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