Linux Programming interview

Books

Advanced Linux Programming.pdf

The Linux Programming Interface.pdf

Understanding Linux Kernel.pdf

Linux covered topics

1. Process

Read here

• 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

  

  • 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

• Definition

  

• 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

4. File System Management

Read here

5. Memory

Read here

6. Networking

Read here

7. Other

Read here

• Serial communication
  • UART
  • SPI
  • I2C
  • USB
• Wireless communication
  • Wifi
  • BLE
  • Zigbee