DOEACC Society 2007 Advanced Level Course In Computer Science A5-R3: STRUCTURED SYSTEM ANALYSIS

PART TWO
(Answer any 4 questions)

5.
a) Why do Businesses need Systems Analysts? What is a System Analyst?
b) Differentiate ranging from the Management info Systems and Decision Support Systems.
c) What are the different system users? explain the functionality of these users.
(4+4+7)

6.
a) What is systems analysis? elaborate the different strategies for systems analysis and issue solving?
b) What is a data flow diagram? Why do systems analysts use data flow diagram?
(7+8)

7.
a) Define the subsequent terms:
i) Candidate Key
ii) Primary Key
iii) Alternate Key
iv) Foreign Key
b) What are CASE tools used for? What is the purpose of
i) Upper Case Tools
ii) Lower Case Tools.
(8+7)

8.
a) What is Object Modeling? elaborate the system concepts for Object Modeling?
b) Discuss the Concept of Object /Class relationships.
(7+8)

9. Write short notes on any 3 of the following:
i) Rapid Application Development (RAD)
ii) Operational Feasibility
iii) Project Walkthroughs
iv) Modelling using VML
(3x5)

A5-R3: STRUCTURED SYSTEM ANALYSIS AND DESIGN
PART ONE
(Answer all the questions)

1. Multiple option of answers
1. one A Zero level DFD defines
A) The fully blown of system design
B) That the system design cannot be split together
C) Overflow of processes, input and output
D) None of the above

1.2 Prototype is a
A) Working model of the existing system
B) Mini-model of the existing system
C) Mini-model of the processed system
D) None of the above

1.3 Which 1 of the subsequent is not an important characteristic of useful and effective information?
A) Completeness
B) Timeliness
C) Economy
D) Accuracy

1.4 A sequential access file is not a file
In which the last record is retrieved in the identical time as the 1st record
In which the a record cannot be accessed unless its predecessor records are accessed
Usually stored on magnetic tape
In which, a new copy of the file is created to insert a record

1.5 Cost of fault correction is lowest at
A) Implementation stage
B) Design stage
C) Development stage
D) Requirement Analysis stage

1.6 A starting point in the hardware design phase of a system design project is
A) Benchmarking
B) Preparation of a purchase contract
C) The determination of size and capacity requirements for the hardware
D) Calling quotations from hardware vendors

1.7 The most creative and challenging phase of the system life cycle is
A) Feasibility study
B) Maintenance
C) Design
D) None of the above


1.8 The data base design activity deals with the design of the
A) Logical data base
B) Physical data base
C) Both A) & B)
D) None of the above

1.9 The static System Models exhibit which kind of relationship
A) Time-cost
B) Activity-time
C) Quantity-cost
D) None of the above

1.10 A decision table consists of 2 parts
A) Stub and entry
B) Pros and cons
C) Condition and outcome
D) None of the above

2. TRUE or FALSE

2.1 A phase in which physical system and computerized system both work is called as parallel run.
2.2 Each data flow in the DFD has a corresponding entry in the data dictionary.
2.3 Coupling is a measure of relative functional strength of a module and cohesion is a measure of relative interdependence among the modules.
2.4 Structured decisions are programmable and unstructured decisions are judgmental.
2.5 A data dictionary is a structured repository of data about data.
2.6 HIPO diagrams are not used to develop packages.
2.7 Audit trails ensure against loss of data.
2.8 Intangible costs are those that have financial values, which are not easily measured.
2.9 An activity of all phases of a structured project is the walkthrough.
2.10 Structure chart is the documentation tool for structure design.

3. Match Words and phrases in column X with the nearest related meaning/word(s)/phase(s) in columnY. Enter your selection in the “tear-off” ans sheet attached to the ques. paper, subsequent instructions therein


X Y

3.1 ATM A. Hacking
3.2 Knowledge base B. Facilitating use of application software
3.3 Structure chart C. Real time system
3.4 Decision tree D. Desired future course of an organization
3.5 GUI E. Part of Expert system
3.6 Smart Card F. Documentation tool for structure design
3.7 Benchmark G. Verification
3.8 Alpha Test H. Logical structure based on a few criteria
3.9 Computer Crime I. Transaction Processing
3.10 Strategy J. Hardware Selection
K. Record management programs
L. Data integrity

4. Fill in the blanks

A Structure design B Maintainability C Acceptance
D Closed system E Feasibility Study F External
G Information H Implementation I Structured design
J Sequential K Top-down L Hierarchical
M Environment N Module O Data communication
P Module testing

4.1 _____________ testing is running the system with live data by the true user.
4.2 Open systems interact with the ___________.
4.3 ___________ is an attempt to minimize complexity and make a program manageable by subdividing it.
4.4 Managers performing strategic functions need _____________ info.
4.5 Digital signature is used in __________.
4.6 _________ testing must precede unit testing and system testing.
4.7 The __________ structuring specifies that an entity can have no more than 1 owning entity.
4.8 In the testing phase of the SDLC, the 1st activity is ____________.
4.9 Where 1 has to process all the records in a file, the best file organization is ____________.
4.10 A HIPO chart is the __________ decomposition.



PART TWO
(Answer any 4 questions)

5. Write short notes on the following:
a) Tangible and Intangible Costs and Benefits
b) Coupling and Cohesion
c) Top-down and bottom-up Approach
(5 x 3)
6.
a) What is SDLC? discuss different phases of this cycle?
b) Explain the strategies used for determining info requirements.
(7+ 8)
7.
a) Information requirements depend upon different factors. elaborate these factors? explain them.
b) What is System testing and what do we test in test in this testing?
c) Discuss system feasibility study.
(5 x 3)
8.
a) What is logical and physical design?
b) What do you mean by system analyst? elaborate the multifaceted roles of a system analyst?
c) What are objectives of a database?
(5 x 3)
9.
a) What quality related concerns are to be pursued while creating software for inventory control in a MIS?
b) Prepare a limited entry decision table for the subsequent case:
A wholesaler has 3 commodities to sell and has 3 kinds of customers. Discount is provided as per the subsequent procedure:
i) For DGS & D orders, 10% discount is provided irrespective of the value of the order.
ii) For orders more than Rs. 50,000/- agent gets a discount of 15% and the retailer gets a discount of 10%.
iii) For orders of Rs. 20,000/- or more upto Rs. 50,000/- agent gets a discount of 12% and the retailer gets a discount of 8%.
iv) For orders of the value less than Rs. 20,000 agent gets 8% and retailer gets 5% discount.
The above rules do not apply to the furniture items where in a flat rate of 10% discount is admissible to all customers irrespective of the value of the order.
(5 + 10)

Earning:   Approval pending.