When listening to Computer Networks class today I got the following interesting doubts which I got clarified by my professor
Q) what is doubt:- when every browser is allocated a port number 80 then how can multiple tabs of chrome or any browser can talk through that when only when process can be listened through one port ?
Ans:– servers listen through port-80 for browsers but not on client side..on client side your OS uses port numbers >5000 so every new tab(as for google it is a process..read the below) uses a unique port number —i.e one process one port
dpkg , apt , synaptic , aptitude —all these belong to debian flavour of linux
apart from dpkg and apt-get we have
aptitude:- it is like a graphical user interface for managing with packages which uses apt-get libraries .It is a package manager with GUI
synaptic:-similar to aptitude. you can look at it’s features here Synaptic.
There are two vague reasons for this (actually depends on phone architecture)
Before I try to convey interesting and informative stuff I recommend you to read these articles first
look at the visualization of different architectures provided in above links
3)monolithic vs microkernel (this gives much easier and nice explanation)
key points to remember:-
Hard Link and Soft Link are the two words which will be heard when you are using Linux (any of it’s distro’s).
what is a hard link?
before that you need to know what is inode.(pronounced as “I node”) a concept of unix-like OS’s
In simple terms inode is a data structure which stores file attributes and disk block locations (simply details about a file object like metadata and permissions etc..,)
x = 5; // Assign 5 to x
elem = document.getElementById("demo"); // Find an element
elem.innerHTML = x; // Display x in the element
var x; // Declare x
so what is wrong with above code ? wait !!
In other words; a variable can be used before it has been declared.