Midterm Review
COP-3402
Table of Contents
Exam format
| Type | Count |
|---|---|
| Multiple choice | 6 |
| Short answer | 7 |
| Long answer | 3 |
| TOTAL | 16 |
- In-person, paper exam
- Separate question sheet and answer sheet
- Additional blank paper will be provided
- Eight double-sided pages of reasonably-sized notes permitted
- No other items (cell phones, laptops, etc.) permitted besides a writing implement with no information
- Put full name and NID on every page (including additional paper, scratch paper, and notes)
- Bring your UCF ID to confirm your identify when taking and submitting the exam.
- Review course policies
- Midterm is worth 8pt. Each question is worth .5pt.
Question topics and examples
File systems
- What makes the unix file system "hierarchical"?
- What is the difference between absolute vs. relative paths
- How are parent directories referenced in the file system?
- Given a tree, which file is being reference by a given path?
- Draw a file system tree.
Navigation
- What is the working directory and how do you display it?
- What is the unix standard command to rename a file?
- What is tab-completion?
- What unix standard will show you the text of a file?
- What does grep do?
- How do you change the working directory to your home directory?
- What is the unix command to delete a file?
- How does the implementation of deleting a file work? Does it remove the file's contents from the storage medium?
Processes, advanced processes?
- how do you redirect standard (out, in) of bash command to a file? for instance, i want to redirect grep's (out, in) to the file grep.txt what do i type?
- how do you redirect standard out from one command to another command's standard in? for instance, let's say i want to count the results of find with wc, what do i type?
Editor
- How do you edit files in vim or emacs (pick one)?
- How do you quit the editor in vim or emacs (pick one)?
Build automation
- What does the (target, recipe, prerequisite) of a makefile rule do.
- By convention, what does the clean target do?
- Here is a makefile, add a clean target to remove the binaries.
- Write a Makefile that will create a program called
hellofrom two source files,main.candhello.c, whenmakeis run.
Version control
- What git command copies commits from the local repository to the remote repository?
- What git command copies commits from the remote repository to the local repository?
- What git command stages a new file?
- What git command creates a log of the change to a staged file to the local repository?
File syscalls
- Using the open syscall (man 2 open, not fopen) to open a path given in the
string char *filepathvariable. - How do you check for and terminate the program on an error with opening a file?
- Using the read syscall (man 2 read, not fopen), you already have an open file with the file descriptor stored in fd, read the first 200 bytes of the file and print it to stdout
- Write a program that uses the opendir/readdir syscalls to list the names of files in the current working directory.
- What syscall can you use to find the (size, number of hard-links) of a file?
- What syscall can you use the find the name of a file?
Process, pipe, syscalls
- Write code that uses unix standard syscalls to create a new process that runs the ls command.
- Write code that creates a new process, where the original process writes "parent" and the new process writes "child", both to stdout.
- Write code that replaces the current processes running program with the stat/ls command (not the stat syscall).
- Write a program that opens a pipe and reads to and writes from it.
- Write a program that redirects the standard output to a file called "output.txt".