https://github.com/harrymadison297/linux-programming-interview

Linux embedded programming interview Q&A
https://github.com/harrymadison297/linux-programming-interview

embedded interview interview-preparation linux networking

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Linux embedded programming interview Q&A

• Host: GitHub
• URL: https://github.com/harrymadison297/linux-programming-interview
• Owner: harrymadison297
• Created: 2024-10-08T09:08:00.000Z (3 months ago)
• Default Branch: main
• Last Pushed: 2024-10-10T10:53:39.000Z (3 months ago)
• Last Synced: 2024-10-19T13:37:40.890Z (3 months ago)
• Topics: embedded, interview, interview-preparation, linux, networking
• Language: C
• Homepage:
• Size: 22.5 MB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Linux Programming interview

## Books

[Advanced Linux Programming.pdf](/Books/Advanced%20Linux%20Programming.pdf)

[The Linux Programming Interface.pdf](/Books/The%20Linux%20Programming%20Interface.pdf)

[Understanding Linux Kernel.pdf](/Books/Understanding%20Linux%20Kernel.pdf)

## Linux covered topics

### 1. Process 

[Read here](/QA/Process.md)

* Process definition

	* PID, PPID

	* Command line argument

	* Envinronment

* Who can access to a process (Process credentials)

	* UIDs and GIDs

	* File-system user permissions

	* Interface

* Process creation

	* `folk()`

	* File access when folk a new process

	* Memory semantics

	* Race condition

* Child process monitor

	* `wait( *status)`

	* `waitpid( pid, *status, options)`

	* Orphan process and zombie process

* Program execution

	* `execve( path, argv, envp )`

	* Run a shell command `system( *command)`

* Process priorities and scheduler

	* `getpriority( which, who)`

	* `setpriority( which, who)`

	* Realtime scheduling

* Process memory and resource

	

	![](/Assets/Memory_layout.png)

	* Process infomation in file system (`/proc`)

* Process termination

	* `exit(status)`

	* Exit handlers `atexit(void (*func)(void))`, `on_exit()`

	* Termination flow

* Daemon process

	* Definition

	* How to create a daemon process

### 2. Threads 

[Read here](/QA/Thread.md)

* Definition

    ![](/Assets/Thread_memory_layout.png)

* Thread identify

  * `pthread_self()`

  * `pthread_equal( thread_id_1, thread_id_2)`

* Thread creation

  * `pthread_create( *thread, *attr, *(*start), *arg)`

* Thread manage

  * `pthread_join( thread, **retval)`

  * `pthread_detach( thread)`

* Thread termination

  * `pthread_exit( *retval)`

* Compling thread

  * `-pthread`

* Thread synchronization

  * Mutexes

  * Condition variables

### 3. Inter-Process Communication 

[Read here](/QA/IPC.md)

   

   ![](/Assets/ipc.png)

### 4. File System Management 

[Read here](/QA/FileSystem.md)

### 5. Memory 

[Read here](/QA/Memory.md)

### 6. Networking 

[Read here](/QA/Networking.md)

### 7. Other 

[Read here](/QA/Other.md)

* Serial communication

  * UART

  * SPI

  * I2C

  * USB

* Wireless communication

  * Wifi

  * BLE

  * Zigbee