FTP in its basic form is not secure, while FTP/S (File Transfer Protocol over Secure Socket Layers) or the SFTP(Secure File Transfer Protocol) allows you to have a more secured port(s), but slows down the speed.
The kernal is part of the operating system and closer to the hardware,
it runs in the privileged mode and providing low level services like:
- memory management
- process management
- system calls
The Basic Input-Output System(BIOS), is responsible to provide drivers for
new devices to OS. BIOS code is stored in read-only memory (ROM) and some
non-volatile RAM. BIOS has 3 main functionality:
- Power on self test(POST), leads to the booting program
- Load and transfer control to boot program
- Provide drivers for all devices
The operating system(OS), which includes the kernal and BIOS would also has
other applications like the user interface(i.e shell, gui, etc)
Swap pairs again and again until everything is in order.
Worse case (reverse sorted list) will have to loop the list N times
# Print all edge nodes of a complete binary tree anti-clockwise.
# That is all the left most nodes starting at root,
# then the leaves left to right and finally all the rightmost nodes.
# In other words, print the boundary of the tree.
# Variant: Print the same for a tree that is not complete.
# Assume we have a binary tree below:
# / \
# 10 20
# / / \
# 50 45 35
# The correct solution should print 30, 10, 50, 45, 35, 20.
Tread is a path of execution within a process, a process can contain multiple threads.
The treads within the same process run in a shared memory space, while process run in separate memory spaces. And treads are not independent of each other like process are.