Do you know bitcointalk is a great place where lots of ideas flourished for cryptocurrency ecosystem in olden days! POS was first discussed in this forum a long time back
hereSince this question has been moved to Altcoin Discussion, you won't be receiving any good replies as spammers float here with shit posts.
1. I know it is give more chance of block mining to users that has more coins.
(example : If some user A has 5% of coins of total supply, that user has more 5% chance to mine new block than other users)
Is this right?
Probably. A holder of 5% of coins can mine 5% of POS block. In simple terms for one to mine a POS block, the miner need to sign a POW block in the sequence of 5 randomly selected keys. When he signs for the fifth time, he mines a POS block. When the miner signs for the fifth time, he needed to generate his own block without any POW submissions. This particular block created is called as a POS block
2-2. If 2 is wrong, then if no mining occur in POS coin, then how transaction confirmed?
For mining to continue,
* We all know that a POW block is created every 10 minutes in the network.
* Once for all the miner finds a valid block, he broadcasts them to the network. If the work is regarded true, then the block is announced in the network. The five signatures signs the hash and transmit to the network. After the signature sequence is complete, the 5th signature publish the POW and POS block.
As far I have understood POS system, I have explained them in simple terms. My understanding may even be wrong.