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“Linux Sysfs frequently Asked Questions in various Linux Sysfs job Interviews by interviewer. The set of questions here ensures that you offer a perfect answer posed to you. So get preparation for your new job hunting”

50 Linux Sysfs Questions And Answers

21⟩ Sysfs was originally called a) device driver filesystem b) kernel interface filesystem c) kernel filesystem d) none of the mentioned

a) device driver filesystem

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22⟩ Sysfs can be considered as the reflection of the a) kernel's device model b) user's device model c) network's device model d) none of the mentioned

a) kernel's device model

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23⟩ The files of sysfs contains the information about a) devices and drivers b) memory mapping c) ports d) none of the mentioned

a) devices and drivers

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24⟩ Which one of the following is not true? a) any file of the sysfs can not be edited b) some files of the sysfs are writable for configuration of devices c) both (a) and (b) d) none of the mentioned

b) some files of the sysfs are writable for configuration of devices

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25⟩ In linux sysfs is always mounted at a) /sys b) /proc/sys c) /proc/mounts d) none of the mentioned

a) /sys

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26⟩ Libsysfs is a a) user space library b) kernel space library c) not a library d) none of the mentioned

a) user space library

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27⟩ Sysfs represents the a) kernel objects b) libraries c) API d) none of the mentioned

a) kernel objects

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28⟩ Sysfs does not contains a) regular files b) symbolic links c) directories d) none of the mentioned

d) none of the mentioned

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29⟩ The directories in the /sys directory represents a) the device files b) major subsystems that are registered with sysfs c) details of buses only d) none of the mentioned

b) major subsystems that are registered with sysfs

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30⟩ In sysfs the device drivers of same _____ are expected to provide same functionalities to the user mode application. a) class b) kobjects c) ksets d) none of the mentioned

a) class

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31⟩ In which directory every kernel module of the system is represented? a) /sys/kernel b) /sys/module c) /sys/kernel/module d) none of the mentioned

c) /sys/kernel/module

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32⟩ The channel between the processor and devices is called? a) bus b) driver c) class d) none of the mentioned

a) bus

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33⟩ Each driver in the device driver model is described by a ______ object. a) dev_d b) device_d c) dev_driver d) device_driver

d) device_driver

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34⟩ Each device in the device driver model is represented by a _____ object. a) driver b) device c) node d) none of the mentioned

b) device

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35⟩ Which one of the following is a read-write semaphore in linux that protects all ksets and kobjects included in the filesystem? a) rwsem b) rwsemaphore c) rws d) none of the mentioned

a) rwsem

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36⟩ The kset contains a) pointer to subsystem descriptor b) pointer to the kobject type descriptor of the kset c) head of the kobjects included in the kset d) all of the mentioned

d) all of the mentioned

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37⟩ The core data structure of device driver model is a) kobject b) kfile c) kmodule d) none of the mentioned

a) kobject

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38⟩ What is the main role of the regular files in the sysfs? a) regular files represent the attributes of devices and drivers b) regular files represent the kernel objects c) regular files represent the kernel sets d) none of the mentioned

a) regular files represent the attributes of devices and drivers

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39⟩ Relationship between components of device driver models are expressed in the sysfs as a) a directory b) a regular file c) symbolic links between files and directories d) none of the mentioned

c) symbolic links between files and directories

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40⟩ When a device is removed from the system a) files and directories of that device in the sysfs are removed automatically b) all the files of sysfs are preserved until the system turn offs c) it does not create any change in the sysfs d) none of the mentioned

a) files and directories of that device in the sysfs are removed automatically

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