Question

What system function returns the size of a file?

Question 1 options:

	stat
	open
	read
	length

Question 2 (1 point)

What function permits you to change a file's permissions?

Question 2 options:

	chown
	chmod
	perms
	stat

Question 3 (1 point)

What does the '<' symbol do in the following command:

ls > data.txt

Question 3 options:

	compares the size of the ls and data.txt files
	redirect the output of the ls command to the file data.txt
	read the contents of the data.txt file and use it as input for the ls command
	redirects stderr to stdout

Question 4 (1 point)

How do the standard C functions fread and fwrite differ from the system functions read and write?

Question 4 options:

	The standard C functions are portable, whereas read and write are not
	The standard C functions are undocumented
	The standard C functions use a different permission system
	The standard C functions have an internal buffer

Question 5 (1 point)

What standard C function performs formatted input from stdin?

Question 5 options:

	getc
	readf
	scanf
	printf

Answer 1

Question 1:
stat system function returns the size of a file
Answer:
stat

Question 2:
chmod function permits you to change a file's permissions
Answer:
chmod

Question 3:
< means read the contents of the data.txt file and use it as input for the ls command
> means redirect the output of the ls command to the file data.txt

Question 4:
The standard C functions have an internal buffer

Question 5:
standard C function performs formatted input from stdin is printf
Answer:
printf