Quiz based on chapter-4 of book linux device drivers 3rd ed

Quiz on chapter-4 of book linux device drivers 3rd ed

1. Which of the following config options need to be enabled to be able to debug kernel.

CONFIG_DEBUG_KERNEL
CONFIG_USB
CONFIG_EXT4
CONFIG_DBG


2. The first argument passed to printk specifies the

loglevel for the message to be printed
terminal number for the message to be printed
userid of the current user
line number in which the message has to be printed


3. The command that can be used to view the kernel logs from user space is

kmesg
dmesg
kmsg
dmsg


4. The function create_proc_read_entry returns a pointer to

struct proc_dir
struct proc_entry
struct proc_dir_entry
struct proc


5. The seq file interface is used for

logging errors in kernel space
Creating a /proc entry
Passing user information to kernel
Passing kernel information to user space


6. output of strace shows

The function calls made by user applications
The system calls made by a user application
The kernel modules used by a user application
The various applications running in the user space.


7. In a kernel oops message EIP points to

The address of the faulty instruction
The faulty instruction
The faulty line in the user code
The faulty user application


8. While using gdb for kernel debugging the kernel core file used passed to gdb is

/proc/core
/proc/kcore
/dev/core
/dev/kcore


9. Which of the following keys will launch the kdb

sysrq
pause
shift
del


10. To use kgdb we need two systems connected by a serial cable

True
False
depends on kernel version
depends on kgdb version