Sample Midterm Answers #12

1. 1. /usr/bishop/passwd+/misc/root.c
   2. /usr/holly/DMS/schedule
2. from > FROM.OUT
3. grep '<stdio.h>' *.c
4. rm ./-i or rm -- -i
5. The path variable contains a list of directories. When a user types a command that does not contain a "/", the shell searches each directory in that list for the command, and executes the first such file it sees.
6. Beause ANSI C does not specify the order of evaluation of function argument, any of the following outputs are possible:

   2 3 4
   2 4 3
   3 2 4
   3 4 2
   4 2 3
   4 3 2
   

7. 1. x = 5, a = 1, b = 4, c = 6
   2. x = 1, a = 0, b = 5, c = 6
   3. x = 1
   4. x = 0
   5. x = 5
   6. x = 3, dx = 3.2
   7. x = 0

8. 3
   0
   3
   6
   5
   3
   3
   1
   3
   

9. n = -123
10. 1. This program compiles correctly. It may give a warning because p is uninitialized when it is used.
    2. When fgets tries to store the line beginning at the address in p, an error occurs. Either the input line is stored at a random memory location, or (more likely) the program terminates abnormally. The problem is that p is uninitialized.