Quiz on chapter-3 of book Linux Device Drivers- 3rd Edition

1. In the output of "ls -l /dev" a character driver is identified by

Letter c in the second column
Letters ch in the second column
Letter c in the third column
Letter p in the first column


2. The argument macro MAJOR is of type

int
char
dev
dev_t


3. Which of the following function is used for static allocation of major number to character driver

register_char
register_chrdev_region
alloc_chrdev_region
alloc_region


4. The structure file_operations is a

Collection of structure pointers
Collection of function pointers
Collection of macro pointers
Collection of string pointers


5. The structure "file" is defined in the header file

linux/file.h
linux/filesys.h
linux/fs.h
linux/sys.h


6. cdev_alloc returns a pointer to

struct cdev
struct chardev
struct dev
struct device


7. If the file_operation implementation of read returns 0 it signifies

Empty file
End of file
No data in file
Error in reading file


8. The arguments passed to "open" method in a device driver are

inode pointer and file pointer
inode pointer and file_operations pointer
file_operation pointer and file_pointer
only file pointer


9. inode structure is used by the kernel internally to represent

Only open files
Only closed files
All files
Running Processes


10. We can find out the major number of a driver by looking at the file

/proc/major
/proc/devices
/proc/modules
/proc/numbers