Final exam Review

1
Final exam Review
2
Review Outline

• Pattern of final.
• Study guide.
• Listed by lectures.
• Sample questions.
• From some important topics.

3
Final exam

• Format
• Similar to the mid-term.
• 25 true/false questions.
• 10 short answer questions.
• 3 long answer questions.
• 1 other question.
• Graded on a scale of 100 points.

4
Final exam (contd.)

• Important topics
• Available on the hand out and also online
• www.cs.pitt.edu/axgopala/cs132/guide/topics.ps
• www.cs.pitt.edu/axgopala/cs132/guide/topics.pdf
• Contains the important topics covered on the
  exam.
• The topics will be covered in more detail in this
  class.

5
Important topics

• Lectures 1 3
• Important characteristics of Unix.
• Usage of commands
• chmod, wc, grep

6
Important topics

• Lectures 4 5
• Unix shell.
• Different kinds of shells.
• Unix command line.
• History of commands.
• Pipes and filters.

7
Important topics

• Lectures 6 7
• Stages in writing and compiling a C program.
• Compiling a C program, and its errors.
• Different kinds of data types.
• Variables and constants.

8
Important topics

• Lecture 8
• Types of operators.
• Precedence of operators.
• Evaluation of expressions.

9
Important topics

• Lecture 9
• Formatted I/O.
• printf () formatted output.
• scanf () formatted input.
• Single character I/O.

10
Important topics

• Lecture 10
• Functions.
• C library functions and their header files.

11
Important topics

• Lecture 11
• Relational operators.
• Equality operators.
• Logical operators.
• Conditional operators.
• Precedence and evaluation of these operators.

12
Important topics

• Lectures 12 14
• User defined data types.
• structures, enumerated types, unions.
• Declaration of these data types.

13
Important topics

• Lecture 15
• Dynamic memory allocation.
• Functions to allocate memory.
• Functions to de-allocate memory.

14
Important topics

• Lecture 16
• Opening a file.
• Closing a file.
• Reading/Writing from files.

15
Important topics

• Lecture 17
• Storage classes.
• Global variables, scope, visibility.
• Compiling and linking program modules.

16
Important topics

• Lecture 18
• C preprocessor.
• Macros
• Preprocessing directives.

17
Important topics

• Lecture 19
• Recursion.
• Advantages of recursion.
• Dis-advantages of recursion.

18
Important topics

• Lectures 20 21
• Examples on file parsing.
• fprintf and fscanf functions.
• fgets and fputs functions.
• fgetc and fputc functions.

19
Important topics

• Lecture 22
• Binary, octal and hexadecimal number systems.
• Bit wise operations.
• Memory representation of ints and chars.

20
Important topics

• Lecture 23
• Shell variables.
• Shell environment variables.
• Declaring and un-declaring variables.

21
Important topics

• Lecture 24
• Writing shell scripts.
• Conditional statements.
• Loop statements.
• Shell operators.
• expr command.

22
Important topics

• Lecture 25
• Shell command line.
• Processing the command line.
• Reading user input.
• Dynamic memory allocation examples.

23
Final exam (contd.)

• No programs will be asked to be written.
• This means that you dont have to write complete
  C programs.

24
Final exam (contd.)

• No questions on the background and history of the
  development of Unix or C will be asked.

25
Final exam (contd.)

• Functions will not be asked to be written.

? No questions on character pointers ?
? No questions on switch-case ?
26
Final exam (contd.)

• Snippets of code will be asked.
• E.g
• Dynamically allocated variables and arrays.
• File operations.

27
Final exam (contd.)

• Unix commands will be asked.
• See the hand out for important topics.
• Includes some AFS commands.
• You should be able to write the Unix commands
  asked of you.

28
Final exam (contd.)

• For snippets of C code, dont worry too much
  about syntax mistakes ?

? Unfortunately, the same does not hold for shell
scripts ?
? You dont need to worry about include files ?
29
Final exam (contd.)

• For writing Unix/AFS commands, dont worry about
  the prompt.

? You do have to worry about case sensitivity. ?
In Unix, Ls ! ls
30
Exam questions

• The type of questions will be similar to the
  mid-term.
• Most questions will be implementation based
  rather than theory.

31
Exam questions

• For the topics mentioned, some sample questions
  are provided.

? These are just questions to give you an idea. ?
? None of these will be directly on the exam. ?
32
Exam questions

• Shell scripts questions will be asked.
• Make sure that you are well versed with writing
  some simple scripts.
• Remember to mention the shell for which the
  script is written for.

? Dont worry, only simple scripts will be asked ?
33
Exam questions

• Sample shell script questions
• Write a shell script to read an input from the
  user and print out its value.
• Write a shell script which will find out the
  hostname of the current machine and print it.

34
Exam questions

• More shell script questions
• Write a shell script to write the multiplication
  table of 9.
• Write a shell script to find out if a string is
  in a particular file by using the command line.
• Etc. etc.

35
Exam questions

• Questions on shell variables will be asked.
• Sample questions
• Declare a shell variable foo in the C shell which
  has value run to the hills.
• Declare an environment variable in bash.
• Define a shell variable.
• Etc. etc.

36
Exam questions

• Remember while working with shell commands and
  shell variables syntax is very very important.
• E.g
• echo PATH is wrong ? you missed the .
• var 100 is wrong ? no space should be there.

37
Exam questions

• Some definitions will be asked.
• Sample questions
• Define a shell variable.
• Define an environment variable.
• Etc. etc.

38
Exam questions

• Evaluation of arithmetic and logical expressions
  will be asked.
• Sample questions
• Calculate the result of the following expression
  x - --y where x 1 y 4.
• Calculate the result of the following expression
  x y z where x 3 y 1 and z 10.
• Etc. etc.

39
Exam questions

• For expression evaluation, show your working
  clearly
• Will help you get partial credit, if you dont
  get the answer right.

40
Exam questions

• Questions on bit wise operators and operations
  will be asked.
• Sample questions
• Calculate x y where x 100, y 111.
• Calculate x ltlt 1 where x 101.
• Etc. etc.

41
Exam questions

• Questions on conversion to different number
  systems will asked.
• Sample questions
• Convert 1101 (in binary) to decimal.
• Convert 7 (in octal) to decimal.
• Convert a0 (in hex) to decimal.
• Etc. etc.

42
Exam questions

• For base conversion problems, show your working
  clearly.
• Can help you get credit if you dont get the
  final answer correct.

43
Final exam (contd.)

• Final exam will be held in the same room as the
  lectures.
• Time of the exam is between 2 and 350 pm.
• Extra time will depend on whether we have another
  exam after ours in the same room.

? Very very unlikely ? ? YIPEE !! extra time
44
Final exam (contd.)

• As mentioned earlier, it will be open books and
  open notes.
• Make sure that you organize your notes, so that
  you dont spend most of your exam time hunting
  for notes ?

45
Final exam (contd.)

• Extra paper for the exam will be provided.
• Write as legibly as possible (most importantly
  your name).
• Good luck ?