R. Gupta Solutions for Chapter: Software Engineering, Exercise 15: Operational Stage

Consider the following code for finding the factorial of a given positive integer.
$\mathrm{IFACT} = 1$

$\mathrm{DO} 100 \mathrm{I} = 2, \mathrm{N}, 2$

$100 \mathrm{IFACT} = \mathrm{IFACT} * \mathrm{I} * (\mathrm{I} - 1)$

For which values of N, the above $\mathrm{FORTRAN}$ code doesn't work?

Which of the following is not an assertion?

For the following code, using symbolic execution, after the iteration with $\mathrm{N} = 5, \mathrm{IFACT}$ is:
$$\begin{gathered} IFACT = 1 \\ DO 100 I = 2, N, 2 \\ 100 IFACT = IFACT * I * (I - 1) \end{gathered}$$

The reliability of a program be $0.8.$The reliability of an equivalent program (i.e., another program that serves the same purpose) is $0.9.$ The probability that both the programs give the wrong result for the same input is:
 

To completely write the program in $\mathrm{FORTRAN}$ and rewrite the $1\%$ code in assembly language, if a project team needs $13$ days, the team consists of:

If $99\%$ of the program is written in $\mathrm{FORTRAN}$ and the remaining $1\%$ in assembly language, the percentage increase in the programming time compared to writing the entire program in $\mathrm{FORTRAN}$ and rewriting the $1\%$ in assembly language is:

If the entire program is written in $\mathrm{FORTRAN}$, the percentage increase in the execution time, compared to writing the entire program in $\mathrm{FORTRAN}$ and rewriting the $1\%$ in assembly language is:

If $99\%$ of the program is written in FORTRAN and the remaining $1\%$ in assembly language, the percentage increase in the execution time, compared to writing the entire program in FORTRAN and rewriting the $1\%$ in assembly language is: