Business Events with multiple Subscriptions

Hi,

For Business Event multiple Subscription can be Created.

Is it like if the Business Event fires - all the Subscription attached with the BE will be get fired ? or only One ?

is the subscription will be fired in parallel mode or one after another.?

If All the subscription as synchronous - then any one subscription fails - then BE send a fail status.

If I am calling Custom PLSQL is called by different Subscriptions - So How to know that which subscription called the Code ?

How to add the Parameters in the Subscriptions ?

Thanks,

LS/