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NIELIT A Level January, 2011 A5-R4: STRUCTURED SYSTEM ANALYSIS & DESIGN

NIELIT A Level January, 2011
A5-R4: STRUCTURED SYSTEM ANALYSIS & DESIGN


PART ONE
(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “tear-off” answer sheet attached to the question paper, following instructions therein. (1x10)

1.1 SDLC is
A) Software Development Life Cycle
B) System Development Life Cycle
C) System Design, Link and Code
D) None of the above
1.2 Software design involves
A) writing algorithms
B) creating flowcharts
C) creating ERD
D) all of the above

1.3 Which of the following is/are true about requirements and specifications?
A) Requirements come from the customer whereas specifications are written by the analyst in
consultation with the customer
B) The customer and user should be the only sources for requirements and specifications
C) SRS should be written in such a manner that any change in requirements does not alter any
specifications
D) None of the above
1.4 Software maintenance takes inputs from
A) SRS
B) Customer feedback reports
C) SDD
D) All of the above
A5-R4 Page 2 of 6 January, 2011
1.5 Data modelling of software does not involve
A) normalization
B) entity and attribute specification
C) optimization for data access
D) Optimization for data computation
1.6 Unit implementation of software does not involve
A) source coding and compiling
B) linking and creation of machine code files
C) writing program codes for interfaces and compilation
D) all of the above
1.7 White-box testing can be started
A) after SRS creation
B) after designing
C) after programming
D) after installation
1.8 Prototyping means
A) creating, developing and refining a working model of the operational system
B) testing the computer system
C) designing the computer system
D) none of the above
1.9 Which of the following statements models can release the software in multiple versions?
A) Waterfall model
B) Prototyping model
C) Waterfall model with feedback
D) Spiral model
1.10 COCOMO stands for
A) Cost Constructive Model
B) Construction Cost Model
C) Common Cost Model
D) None of the above

2. Each statement below is either TRUE or FALSE. Choose the most appropriate one and ENTER in the “tear-off” sheet attached to the question paper, following instructions therein. (1x10)

2.1 Each data flow in the DFD has a corresponding entry in the Data Dictionary.
2.2 A cost-benefit analysis calculates the Break Even Point.
2.3 Coupling between modules should be maximum for better maintainability of the software.
2.4 The logical schema, of a system that uses a database, is identical to the Entity Relationship
Diagram of the System.
2.5 Attributes are assigned value when instances of objects are defined.
2.6 Data integrity is ensured by preventing unauthorized access.
2.7 Rows of a relation are called entities.
2.8 Management policy changes are difficult to implement in a file based system because
redundant data are stored.
2.9 A physical DFD specifies who generates data and who processes it.
2.10 A Database Administrator is the one who designs the database for an application.

3. Match words and phrases in column X with the closest related meaning/word(s)/phrase(s) in column Y. Enter your selection in the “tear-off” answer sheet attached to the question paper, following instructions therein. (1x10)
                                    X                                                 Y
3.1 Alpha Test                                        A. Begins when the software is feature complete
3.2 ERD                                                 B. Fact finding
3.3 Data Flow                                        C. Performance Indicator
3.4 System log                                       D. Data Model
3.5 Algorithm                                        E. Structured Design
3.6 Pull down Menu                              F. A file of all updates
3.7 Modularity                                      G. Data Management
3.8 Range Check                                   H. Selection of an option by an user
3.9 Beta Test                                         I. Generic solution to problems
3.10 Turnaround time                            J. Reasonable limit to input
                                                              K. Arrow
                                                              L. Access Control
                                                             M. Programming

4. Each statement below has a blank space to fit one of the word(s) or phrase(s) in the list below. Enter your choice in the “tear-off” answer sheet attached to the question paper, following instructions therein. (1x10)

A. Dictionary                              B. Pseudo Code                                C. Dialogue
D. Interface                                 E. Planning                                       F. Delete and Update
G. Prototyping                             H. Throughput                                  I. Computer Programming
J. Audit                                        K. Technical                                      L. Operational
M. Structure

4.1 Data ________ describes every data element comprehensively.
4.2 Gantt Chart is a ________ tool for managing projects.
4.3 Menu driven mode is a ________ strategy to interface with the system in an interactive
mode.
4.4 The modular concept is applicable to systems design as well as ________.
4.5 Reason for normalization is to ________ data.
4.6 Computer based ________ can be done through or around the computer.
4.7 Whether a proposed system can provide right information for the organisation’s personnel
falls under the study of ________ feasibility.
4.8 Structured English is often called ________ because it mimics programming code.
4.9 A ________ is made after completion of a pre-planned series of steps.
4.10 ________ is the hardware/software boundary that permits communication between people
and computers.

PART TWO
(Answer any FOUR questions)
5. Write brief notes on any three of the following:
a) Waterfall Model
b) Audit Trail
c) Data Dictionaries
d) PERT
(5+5+5)
6.
a) Describe the three types of feasibility studies under preliminary investigation.
b) What is the difference between MIS and DSS?
c) What is normalization of a relation?
(6+4+5)
7.
a) What is the basic difference between Systems Approach and Systems Analysis?
b) What are the differences between verification and validation processes?
c) What do you understand by the term data integrity? How can data integrity be maintained in
a database?
(5+5+5)
8.
a) Why is object-oriented modelling used in practice?
b) What do you understand by information hiding? Why is it resorted to in designing
information system? How is it achieved?
c) What are the objectives of system tests?
(5+5+5)
9.
a) An institute has the following rules for a student to qualify for a degree with Computer
Science as the main subject and Mathematics as the subsidiary subject:
i) He should get 50% or more marks in Computer Science and 40% or more marks in
Mathematics.
ii) If he gets less than 50% marks in Computer Science, he should get 50% or more
marks in Mathematics. He should, however, get at least 40% marks in Computer
Science.
iii) If he gets less than 40% marks in Mathematics and 60% or more marks in Computer
Science, he is allowed to reappear in Mathematics only so that he can qualify.
Obtain an LEDT (Limited Entry Decision Table) for the rules.
b) An university has a number of institutes attached to it. Each institute has at least one library.
Students, faculty members, administration staff, and directors of the institutes can access
their libraries with respective authorities and permissions. Guests can access the guest
section of the library, which contains some open magazines and information catalogues of
books and journals available in the library. The students, staff members as well as the
directors of any institute can access the libraries of other colleges as guests only. Directors
and faculty members are usually granted similar facilities in the system.
A5-R4 Page 6 of 6 January, 2011
The University is interested in creating a centralized online system having all the information
about the libraries of different institutes so that people can access this information with their
assigned permissions unaltered from as defined in the traditional system.
Draw an ERD for the above system.
(6+9)

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