The following four requests could come in to an operating system as it is running on a computer system. • the clock in the computer has just "ticked," and we need to update a seconds counter. • the program running on processor 2 is trying to perform an illegal operation code. • someone pulled the plug on the power supply, and the system will run out of power in 50 msec. • the disk has just read the character that passed under the read/write head, and it wants to store it in memory before the next one arrives. in what order should the operating system handle these requests?

In addition to using the icons to adjust page margins, a user can also use

Write lines of verse that rhyme to remember the following information: acid rain is a type of air pollution caused by chemicals in the air.

Write the command that can be used to answer the following questions. (hint: try each out on the system to check your results.) a. find all files on the system that have the word test" as part of their filename. b. search the path variable for the pathname to the awk command. c. find all files in the /usr directory and subdirectories that are larger than 50 kilobytes in size. d. find all files in the /usr directory and subdirectories that are less than 70 kilobytes in size. e. find all files in the / directory and subdirectories that are symbolic links. f. find all files in the /var directory and subdirectories that were accessed less than 60 minutes ago. g. find all files in the /var directory and subdirectories that were accessed less than six days ago. h. find all files in the /home directory and subdirectories that are empty. i. find all files in the /etc directory and subdirectories that are owned by the group bin."