Ive learned that one should allot a swap space inorder to have Hibernate option in Ubuntu, Why isnt it same with Windows? My Win 7 doesnt have any Swap space but still hibernates without a glitch.
Typically a swap file is used when the RAM is exceeded to free the RAM by storing its content to a swap file.
In Windows environments this is a file (usually pagefile.sys) which is stored on the system partition.
In Linux it is recommended to create an extra partition for swap. As far as I know this is not needed, you should be able to hibernate without an extra partition because linux should be able to use a file, too. For further information: https://superuser.com/questions/21020/can-i-hibernate-linux-without-a-swap-partition
The advantages of an extra swap partition are:
