Which of the following is a desirable property of a module?

Which of the following types of maintenance takes the maximum chunk of the total maintenance effort in a typical life cycle of a software product?

Which of the following comments about the object-oriented design of software, is not true?

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?