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This MCQ-formatted quiz focuses on system calls basics and file handling system calls.
A system call is a routine built into the kernel and performs a basic function. True or false?
True
False
The CPU runs in __ mode when we execute a C program.
User
Kernel
Supervisory
System
In __mode, the kernel runs on behalf of the user.
User
Kernel
Real
All
All UNIX and LINUX systems have one thing in common, which is a ____
Set of system calls
Set of commands
Set of instructions
Set of text editors
Which of the following system call is used for opening or creating a file?
Read
Write
Open
Close
For reading input, which of the following system call is used?
Write
Rd
Read
Change
The chmod command invokes the ____ system call.
Chmod
Ch
Read
Change
There are __ modes for opening a file.
4
3
2
1
Which of the following modes is used for opening a file in both reading and writing?
O_RDONLY
O_WRONLY
O_WDR
O_RDWR
The open system call returns the file descriptor as
Int
Float
Char
Double
Which of the following commands is used to view your file 24 lines at a time?
pg
cat
lp
/p
None of the above
Which option will be used with the ps command to slow the entire command line of the running process?
-4
-f
-1
-2
None of the above
Which of the following directories contain all the Alias created by a user, including their login directory?
/tmp
/etc
/usr
/dev
None of the above
Which option is used with the rm command to prompt the user with each filename and a ? before acting on it
-r
-x
-1
-i
None of the above
Which of the following commands is used to obtain a list of all files by modification time?
ls -1
ls -t
ls -i
ls -R
None of the above
