Referred to Helloworld_rasp3_char_driver.c in source code, What does the register_chrdev_region function call do?
a.
It removes the character device from the kernel.
b.
It initializes the character device's file operations.
c.
It allocates a character device number and registers it with the kernel.
d.
It unregisters a character device.
2Refered to Helloworld_rasp3_char_driver.c in source code, What is the major number defined in the code, and why is
it significant?
a.
The major number is arbitrary and doesn't serve any specific purpose.
b.
The major number is 202, and it represents the number of device files.
c.
The major number is used to specify the size of the character device.
d.
The major number is used to identify the character driver and is part of the device file's name.
Refered to Helloworld_rasp3_char_driver.c in source code, Which function is called when an application invokes an
ioctl operation on the character device?
a.
my_dev_close
b.
unlocked_ioctl
c.
my_dev_ioctl
d.
my_dev_open
Which of the following best describes the primary function of a character driver in Linux?
a.
Storing and retrieving files from disk
b.
Managing and controlling hardware devices
c.
Running system services and daemons
d.
Handling graphics and GUI elements
Refered to Helloworld_rasp3_char_driver.c in source code, Which Linux kernel data structure is used for character
devices and contains important information about the driver?
a.
struct file_operations
b.
struct filesystem
c.
struct device
d.
struct char_driver
Refered to Helloworld_rasp3_char_driver.c in source code, In the context of character drivers, what does
"file_operations" refer to in the Linux kernel?
a.
The file system used in embedded Linux
b.
A hardware component responsible for file storage
c.
A graphical user interface library
d.
A set of functions that define the driver's behavior
Refered to Helloworld_rasp3_char_driver.c in source code, In the context of character drivers, what is "major" and
"minor" device numbers used for?
a.
Identifying device types
b.
Identifying device files within the /dev directory
c.
Defining file permissions
d.
Identifying file extensions
Refered to Helloworld_rasp3_char_driver.c in source code, What does the unregister_chrdev_region function do in the
hello_exit function?
a.
It releases allocated memory.
b.
It logs a message when the character device is unregistered.
c.
It initializes the character device.
d.
It removes a character device number and unregisters it from the kernel.
Refered to Helloworld_rasp3_char_driver.c in source code, What is the significance of the MY_MAJOR_NUM constant
in this code?
a.
It sets the device's minor number.
b.
It determines the size of the character device file.
c.
It specifies the device's permissions.
d.
It represents the device's major number and helps identify the character device.
Refered to Helloworld_rasp3_char_driver.c in source code, Which function is called when an application invokes an
ioctl operation on the character device?
a.
my_dev_close
b.
my_dev_open
c.
my_dev_ioctl
d.
unlocked_ioctl
Refered to Helloworld_rasp3_char_driver.c in source code, What does the my_dev_open function do?
a.
It logs a message when the character device is opened.
b.
It closes the character device file.
c.
It writes data to the character device.
d.
It initializes the character device.
Refered to Helloworld_rasp3_char_driver.c in source code, What is the purpose of the "write" method in a character
driver?
a.
It writes data to the device.
b.
It reads data from the device.
c.
It initializes the character driver.
d.
It closes the device file.
Refered to Helloworld_rasp3_char_driver.c in source code, What does the cdev_add function do?
a.
It deallocates a character device number.
b.
It adds a character device to the kernel and associates it with a file operations structure.
c.
It initializes the character device's file operations.
d.
It logs a message when the character device is added to the kernel.
Refered to Helloworld_rasp3_char_driver.c in source code, What does the register_chrdev_region function call do?
a.
It initializes the character device's file operations.
b.
It allocates a character device number and registers it with the kernel.
c.
It removes the character device from the kernel.
d.
It unregisters a character device.
Refered to Helloworld_rasp3_char_driver.c in source code, Which system call is used to open a character device file in
Linux?
a.
write()
b.
read()
c.
ioctl()
d.
open()
Refered to Helloworld_rasp3_char_driver.c in source code, What is the primary purpose of the MODULE_LICENSE
directive in the code?
a.
To specify the licensing terms of the kernel module
b.
To configure the kernel's character device driver
c.
To specify the version of the kernel module
d.
To define the module's file operations
Refered to Helloworld_rasp3_char_driver.c in source code, What does the unlocked_ioctl field in the file_operations
structure represent?
a.
It defines a custom ioctl handler.
b.
It controls file permissions for ioctl operations.
c.
It specifies the ioctl command to execute.
d.
It indicates that ioctl is a locked operation.
Refered to Helloworld_rasp3_char_driver.c in source code, What does the cdev_add function do?
a.
It deallocates a character device number.
b.
It initializes the character device's file operations.
c.
It logs a message when the character device is added to the kernel.
d.
It adds a character device to the kernel and associates it with a file operations structure.
Refered to Helloworld_rasp3_char_driver.c in source code, What is the purpose of the my_dev_open function?
a.
It handles character device file closure.
b.
It writes data to the character device.
c.
It initializes the character device.
d.
It opens the character device file and logs a message.
Refered to Helloworld_rasp3_char_driver.c in source code, What is the purpose of the module_init and module_exit
macros in this code?
a.
They register the character device with the kernel.
b.
They specify the module's licensing terms.
c.
They define the entry and exit points for the kernel module.
d.
They configure the character device's file operations.
In Linux, how can a user-space application interact with a character driver?
a.
By directly accessing the driver's memory space
b.
Through file operations using standard system calls
c.
By making system calls to the kernel
d.
By using the dd command only
How can a character driver interact with user-space applications in Linux?
a.
Using graphical user interfaces
b.
Through system calls and file operations
c.
Through direct memory access
d.
Via kernel modules
Refered to Helloworld_rasp3_char_driver.c in source code, What is the primary purpose of the module_exit macro in
the code?
a.
To define the character device's file operations
b.
To specify the licensing terms of the kernel module
c.
To initialize the character device
d.
To specify the exit point when the module is removed from the kernel
Refered to Helloworld_rasp3_char_driver.c in source code, What is the purpose of the file_operations structure in a
Linux character driver?
a.
It specifies the permissions of character device files.
b.
It contains metadata about the driver.
c.
It defines a set of functions that the driver should implement.
d.
It is used to configure the hardware connection.
Refered to Helloworld_rasp3_char_driver.c in source code, In the provided code, which macro specifies the author and
contact email for the kernel module?
a.
MODULE_VERSION
b.
MODULE_DESCRIPTION
c.
MODULE_LICENSE
d.
MODULE_AUTHOR
Refered to Helloworld_rasp3_char_driver.c in source code, In the context of character drivers,
what is a "major number"?
a.
The number of bytes a device can read or write
b.
The number of available character devices in the system
c.
A unique identifier for a character device driver
d.
The size of the character device file
Clear my choice
Refered to Helloworld_rasp3_char_driver.c in source code, In the context of character drivers,
what is a "major number"?
a.
The number of bytes a device can read or write
b.
The number of available character devices in the system
c.
A unique identifier for a character device driver
d.
The size of the character device file
Clear my choice
Refered to Helloworld_rasp3_char_driver.c in source code, What is the purpose of the module_init and module_exit
macros in this code?
a.
They specify the module's licensing terms.
b.
They define the entry and exit points for the kernel module.
c.
They configure the character device's file operations.
d.
They register the character device with the kernel.
Refered to Helloworld_rasp3_char_driver.c in source code, What is the role of the read method in a character driver?
a.
It reads data from the device.
b.
It closes the device file.
c.
It writes data to the device.
d.
It initializes the device.
Refered to Helloworld_rasp3_char_driver.c in source code, Which function is called when the kernel module is loaded
into the kernel at boot time or manually using insmod?
a.
hello_init
b.
my_dev_ioctl
c.
Hello_exit
d.
my_dev_open
Refered to Helloworld_rasp3_char_driver.c in source code, What is the purpose of this Linux kernel module?
a.
To create a new character device file
b.
To develop a graphical user interface
c.
To implement a custom file system
d.
To configure the kernel's character driver
What is the role of the minor number in a character device file?
a.
It indicates the device's file size.
b.
It defines the major characteristics of the device.
c.
It distinguishes multiple devices managed by the same driver.
d.
It specifies the permissions of the device file.
Refered to Helloworld_rasp3_char_driver.c in source code, What is the
primary purpose of a character driver in a Linux embedded system?
a.
To display characters on the console
b.
To interface with hardware devices that transfer data character by character
c.
To control graphical user interfaces (GUIs)
d.
To manage filesystem operations
