CIS 140U - LAB EC – FALL XXXXXXXXXXNAME _______________________________ Optional Extra Credit – Comprehensive Concepts – Fill-In and Short Essay Questions Do as many of these questions as you can. You...

CIS 140U - LAB EC – FALL 2012 NAME _______________________________
Optional Extra Credit – Comprehensive Concepts – Fill-In and Short Essay Questions
Do as many of these questions as you can. You receive extra credit points for as many as you correctly answer. Enter your answers in
bold.


Fill-In Section


One point

for each fill-in question. Complete each statement with at most three words.

1. Which daemon is well suited for scheduling repetitive tasks _________________________.
2. Another name for virtual memory is _________________________ memory.
3. _________________________ divides a hard disk into adjacent sections, each of which can contain a separate filesystem used to store data.
4. To halt your system in 30 minutes, type the command _________________________.
5. In Linux, the command _________________________ displays currently logged-in users.
6. When a user logs into their Linux system, he/she is placed in their _________________________ directory.
7. The file
.file.dat
is an example of a(n) _________________________ file.
8. In a file listing, the 9 characters following the file type (for example,
rwxr-xr-x) refer to the file's _________________________.
9. Special metacharacters used to match patterns of text within text files are called _________________________.
10. In the Linux shell, to copy a directory full of files and subdirectories, you must tell the
cp
command that the copy will be ____________________ (involve files and subdirectories too) by using the -r option
11. When a user creates a file or directory, that user’s account name and ____________________ become the owner and group attributes of the file, respectively.
12. If you find a corrupted device file, or accidentally delete a device file, the ____________________ command can be used to re-create the device file if you know the type, major, and minor numbers.
13. Creating a filesystem on a device is commonly referred to as ____________________.
14. Each track on a hard disk is divided into ____________________ of information.
15. In shell scripts, an
if
construct must be ended by ____________________.
16. The init daemon uses its configuration file, ____________________, to determine the default runlevel.
17. The amount of time a process has to use the CPU before another process gets its chance is called a(n) ____________________.
18. Which command line command is used to create an account? ____________________
19. Which command line command is used to create a group? _____________________
20. What is the pathname for the file that contains all the user accounts? _______________________

Short Essay Section


Three points

for each essay question. For full credit, the answers to the following questions should be in complete English sentences and, when possible, make more than one point. For example,


Sample Question:



In Linux, what does the term “terminal” refer to?


Poor Answer:


A terminal is a device named tty1, tty2, tty3, etc.


Good Answer:


A terminal is the channel that allows a certain user to log in to the operating system and work interactively. There can be many terminals in Linux (for example, tty1, tty2, tty3, etc.) that allow one to log in to the computer locally or across a network. After a user logs in to a terminal, he/she receives a user interface called a shell, which then accepts input from the user and passes this input to the kernel through the terminal for processing.

21. The most common Internet services that Linux hosts are described in Chapter 1 of the text. Describe briefly two of these services.
22. Describe the possible methods for obtaining Linux support discussed in Chapter 1 of the text.
23. What are the three main components of a command one enters at the shell prompt, and give examples of each.
24. What is virtual memory?
25. What is journaling? What is the advantage of journaling? Name a common journaling filesystem.
26. Briefly describe four shell commands used to create and manage user accounts and groups.
27. What is the difference between an absolute and a relative pathname? What is a benefit of each?
28. What is the disadvantage of using the
cat
command to display a very large text file? How can you get around this problem?
29. Why is the vi editor called a bi-modal editor? Explain.
30. What is the difference between the
mv
and
cp
commands? How do you copy a directory full of files in Linux?
31. What are character devices and block devices? What is the difference between them? What types of devices are represented by block device files?
32. How is the inittab file used? What is the format of the records in the inittab file?
33. What are shell variables? What are environment and user-defined variables?
34. What are shell scripts? Why and how are they executed?
35. List and describe the seven Linux runlevels. Mention the common name of each.
36. How does the nice value affect process priority? How are nice values altered?
37. Describe the system cron table. How it is organized, and what information may be contained within it?
38. How is the hashpling line identified in scripts? What is the purpose of the hashpling line?
39. Describe how the
/etc/passwd
and
/etc/shadow
files are used in the authentication process. Why are two files used instead of one?
40. How do you delete a user account? When you delete a user account, does everything related to that account get deleted? What happens to the user’s files?
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