ALCCS
FEBRUARY 2009
NOTE:
· Question 1 is compulsory and
carries 28 marks. Answer any FOUR questions from the rest. Marks are indicated against each question.
· Parts of a question should be
answered at the same place.
· All
calculations should be up to three places of decimals.
Q.1 (7
x 4)
a. Which process model will be
used to develop the following system? Justify your answer?
(i) Airline
Reservation System, which is intended to replace an existing system.
(ii)
Railways Interactive System, which allows railway passengers to find
train times from terminals installed in stations.
b. Discuss any two software myths
each from the perspective of a Client and a Developer?
c. Discuss the
advantages and disadvantages of using a Water-fall model for software
development?
d. Discuss the
role stubs and drivers in unit testing?
e. What is regression
testing? When is regression testing done?
f. Differentiate
between Software Verification and Software Validation. Mention the types of the
validation testing used for product software.
g.
What is software maintenance? Justify the statement "Maintenance is
unavoidable in software systems".
Q.2 a. What are Software Correctness, Software
Robustness and Software Reliability? How are they related? (6)
b. Discuss the different categories of software
development projects according to the COCOMO estimation model. (6)
c. Differentiate
between LOC and the Function Point metric to measure the size of the software
product? (6)
Q.3 For the following problem statement
The blood bank wishes to computerize its
operations. The bank issues blood to patients and hospitals. When a hospital
requests for blood the request is immediately serviced. When a patient requests
for blood then a relative is asked to replace blood in the blood bank storage.
This blood may or may not be of the same blood group. The blood bank also
collects blood from non-blacklisted donors. This collection can be from regular
donors or from camps which are organized now and then. Every time blood is to
be collected, the bank checks whether the person is suffering from any fatal or
non-fatal disease or not. In case the person is identified to have fatal
disease, the person is black-listed. If the person is healthy, then the blood
group is determined and the blood is collected and stored in the bank. A
collection report is generated by the blood bank and given to the donor.
(i)
Draw
a Data Flow Diagram?
(ii)
Map
the Data Flow Diagram to Structure Charts (10+8)
Q.4 a. Define coupling and cohesion. Discuss the different types of
coupling and cohesion in modular design? (9)
b. What is program debugging? How is it different
from program testing? Discuss any four approaches used for debugging a program. (9)
Q.5 a. Draw a flow graph, arrive at the cyclomatic
complexity, find the set of linearly independent paths for the following program.
void F(int key,
int T[ ], int size, boolean found, int L) (10)
{
int
bot, top, mid;
bot=0;
top=size-1;
L=(top+bot)/2;
if(T[L]
= = key) found = true;
else
found=false;
while
(bot<=top && !found)
{
mid
= (top+bot)/2;
if
(T[mid] = = key )
{
found
= true; L=mid;
}
else
if (T[mid] < key )
bot = mid + 1;
else
top = mid – 1;
}
}
b. Discuss
the Statement Coverage, Branch Coverage, Condition Coverage and Path coverage
Structural testing techniques with the help of an example. (8)
Q.6 a. Discuss the components of a Software
Requirement Specification document.
b. Discuss any two-specification tools for
arriving at a SRS document.
c. Define Software Re-engineering? Discuss the
steps involved in re-engineering a software system. (6+6+6)
Q.7 Write short notes on any THREE of the following:
(i)
Integration
and System Testing.
(ii)
CASE
Tools.
(iii)
Mutation
Testing.
(iv)
Walkthroughs
& Inspections.
(v)
Functional
testing. (6+6+6)