bca3050 smu bca Spring 2015 III sem assignment

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Spring 2015, ASSIGNMENT

PROGRAM BCA (REVISED FALL 2012)

SEMESTER 3

SUBJECT CODE & NAME BCA3050 – Soft Skill - Personality Development

BK ID B0726 CREDITS 2 MAXIMUM MARKS 30

Q. No 1 (a) Explain any two personality characteristics in an organization

(b) Explain the POSEC method of time management 5+5 10

Answer: a) personality characteristics in an organization:

1.      Positive/Negative Affect: Individuals who focus on the positive aspects of themselves, other people, and the world in general are said to have positive affect. In contrast, those who accentuate the negative in themselves, others, and the world are said to possess negative effect. Employees

Q2 Why are goals important? Why should they be SMART? 10 10

Answer:

Why are goals important?

Goals give a sense of direction. People confuse goals with dreams and wishes. Dreams and wishes are nothing more than desires. However, desires become strong when they are supported by,

 Direction

 Dedication

 Determination

 Discipline

 Deadlines

That is what differentiates a desire from a goal. Goals are dreams with a deadline and an action plan. Goals

Q3. (a) How does Jung explain the traits of personality?

(b) What is self-image? How is it created? 5+5 10

Answer:

A) Carl Jung proposed two-part theory of personality. According to it, he type casts all profile into two compartments.

1. Extroversion and Introversion

Extraversion (also "extroversion") is marked by pronounced engagement with the external world.

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bca3040 smu bca Spring 2015 III sem assignment

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PROGRAM

BCA(REVISED FALL 2012)

SEMESTER - 3

SUBJECT CODE & NAME

BCA 3040 – DATA COMMUNICATION

BK ID - B1644

CREDITS - 4

MAXIMUM MARKS – 60

Q1. What is modulation? Explain why modulation is required? 10

Answer: 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 typically contains information to be transmitted. If we look at a general function for a sinusoid:

Q2. Write short note on:

1. Ground Wave Propagation

2. Sky Wave Propagation

Answer:

Q3. Briefly explain Nyquist theorem with mathematical representation. 10

Answer: 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

Q4 What is Time-division multiplexing (TDM)? Explain. 10

Answer:

Q5. Write short note on:

1. Least-Cost Algorithms

2. Dijkstra’s Algorithm

Answer:

Q6. Explain in brief any five benefits of wireless LANs (WLANs).

Answer:

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bca3030 smu bca Spring 2015 III sem assignment

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Spring 2015, ASSIGNMENT

PROGRAM BCA(REVISED FALL 2012)

SEMESTER 3

SUBJECT CODE & NAME-BCA3030 -UNDERSTANDING PC & TROUBLE SHOOTING

CREDIT 4 BK ID B1416 MAX. MARKS 60

QNO1 Differentiate CISC with RISC.                            10

Answer - CISC is the acronym for Complex Instruction Set Computer. Most computers use CISC because hardware is always faster than software and an instruction set is made that is powerful and

QNO2 Explain about the Sockets and slots of the Motherboard.             10

Answer –The different classifications of the motherboards are based on sockets and slots. Socket is a place where we can fit electric devices and Slot is an opening in the computer motherboard which will allow plugging in the circuit boards. Through this we can insert or connect the

QNO3 Define the following                                                               5+5 = 10

a. Front Sided Bus

b. Dual Independent Bus

Answer–(a)Front Sided Bus

Front Sided Bus and used to connect CPU to the computer system and CPU with the various other components of the system. FSB is two directional flows of data. It means various components send

QNO4.Whatare the advantages and disadvantages of switching power circuit?            10

Answer   - The power wastage in the regulator can be reduced by supplying the enough energy needed to the regulator. This achieves and maintains a stable output voltage which increases the

QNO5 Discuss any five guidelines that we need to follow while troubleshooting the hardware problem.           10

Answer -A device or hardware conflict occurs when sound card simply doesn't work (no sound effects or music). Sometimes it may repeat the same sounds over and over and causes PC to freeze. Sound

QNO6 Explain DirectX.                                             10

Answer - DirectX is a technology from Microsoft, which is a collection of Application Programming Interfaces (APIs) for handling tasks related to multimedia, especially game programming and video, on Microsoft platforms. Originally, the names of these APIs all began with the word Direct, such as Direct3D, DirectDraw, DirectMusic, DirectPlay, DirectSound, and so forth. But later on the name DirectX was coined to refer to all of these APIs (the X

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bca3020 smu bca Spring 2015 III sem assignment

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PROGRAM

BCA (REVISED 2012)

SEMESTER - 3

SUBJECT CODE & NAME

BCA3020 - Database Management System

BK ID - B1479

CREDIT - 4

MAXIMUM MARKS – 60

Q1. What is Database? Explain its properties. 10

Answer: Database: The database is a collection of related data. The basic component of a file in a file system is a data item, which is the smallest named unit of data that has mSeaning in the real world – for example, last name, first name, street address, ID number, or political party. A group of related data items

Q2 Write the functions of the following (a) Storage Manager (b) Buffer Manager   3+2

Answer –    

Storage manager

                The Storage Manager: The Storage Manager interfaces with the operating system (OS) to write

Q3 List and explain the important responsibilities of database manager. 

Answer - Databases typically require a large amount of storage space. Corporate databases are usually measured in terms of gigabytes of data. Since the main memory of computers cannot store this

Q4. What is Relational Database Management System? Explain three aspects of RDBMS. 10

Answer: Relational Database Management System: 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 has three aspects:

1. Structures

2. Operations

3.

Q5. What do you mean by Embedded SQL? How do you declare variables and exceptions? 10

Answer: Embedded SQL: We have looked at a wide range of SQL query constructs, treating SQL as an independent language in its own right. A relational DBMS supports an interactive SQL interface, and users can directly enter SQL commands. This simple approach is fine as long as the task at hand can be accomplished entirely with SQL commands. In practice we often encounter

Q6 What are the disadvantages of Data Distribution

Answer - Disadvantages of Data Distribution The primary disadvantage of distributed database systems is the add

Q no 7 Write a note on the following a) SUBSET Mapping b) SUPERSET Mapping  5+5

Answer -  As a result, VBSF supports two types of class-to-table mappings that help overcome the differences between relational and object models: SUBSET and SUPERSET.

SUBSET Mapping

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bca3010 smu bca Spring 2015 III sem assignment

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Spring 2015, ASS IGNMENT

PROGRAM BCA (REVISED FALL 2012)

SEMESTER 3

SUBJECT CODE &

NAME

BCA3010 -COMPUTER ORIENTED NUMERICAL METHODS

CREDIT 4

BK ID

B1643

Q.1. Find the Taylors Series for f(x)=x³-10x²+6 about x₀=3

Solution.

We know that Taylor's series expansion of function at

Q.2. 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 > 0 and

 

Q.3. Solve the equations

2x + 3y + z = 9

x + 2y + 3z = 6

3x + y + 2z = 8

by LU decomposition method.

Solution.

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 nearer to the end value of the table.

Hence we choose the

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

Solution.

The given difference equation can be written as

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