Q52.
c
Section
5-1 Project management
Answer
Explanation
The critical path (longest path) when ten (10) days is required for Task D is as follows:
A(5) + C(5) + D(10) + E(5) + Dummy task(0)+ H(6) = 31 days
If the number of days required for Task D on the critical path is reduced to 6 days,
A(5) + C(5) + D(6) + E(5)+ Dummy task(0)+H(6) = 27 days
If the number of days required for Task D is six (6) days, the critical path is as follows:
A(5) + C(5) + F(12) + H(6) = 28 days
Therefore, the number of days by which the work as a whole can be reduced is as follows:
31 days − 28 days = 3 days
Q53.
a
Section
4-1 System development technology
Answer
Explanation
The created program must operate normally regardless of the kind of data that is inputted.
Therefore, data with a variety of values is prepared and testing is performed.
b): If the programmer prepares the test environment, it is more difficult for unexpected errors
to occur, so a programmer should not prepare the test environment.
c): Program quality improvements should be carried out at the design stage, so repeating tests
with the aim of improving quality should be avoided.
d): It is better to add test data that can confirm whether the modified program works correctly
to the test data used up until the modification, and perform retesting.
Q54.
d
Section
4-2 Software development management techniques
Answer
Explanation
When a program that has gone live is modified directly, it cannot be restored if bugs occur as
a result of the modifications. Therefore, modification work should be carried out on a copy of
the program for test use.
Q55.
a
Section
5-1 Project management
Answer
Explanation
The estimate targeted a productivity of 100% using 150 person-months in development, but
the reality is 30% productivity using 60 person-months. If development work continues at this
productivity level, the number of person-months until work is completed will be 60 personmonths ÷ 30% = 200 person-months. Therefore, the estimate will be exceeded by 200 − 150 =
50 person-months.
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