16, I had A for the following reasons:
It isn't B) because payment details are NOT accessed to make a booking, in fact, the arrow points in the wrong direction for that to be correct.
C) is also wrong because the customer provides no details to the bank, the customer deals only with the Make booking process.
D) is also wrong because the customer receives a payment record and travel confirmation thing from the Process payment process, the process receives the transaction receipt.
Plus, A) is true, the stored data is used to make the booking, the request goes to the data store and the data store returns the selected flight, which the Make booking process does.
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Question 17 is C for the following reasons:
It isn't flash memory because flash memory does not have a read/write head, does not rotate, and does not store data in concentric circles (tracks) there's your first clue that eliminates them all but one.
It isn't tape because once again it's a series of concentric circles, not a spiral, plus, if it was a tape, there's no way it could be read in that order.
It isn't an optical disc either, this is because optical discs do not store data in concentric circles, they store them in a long continuous spiral, like a record does, plus there's no guarantee that it will be read in that order, especially if it reads A first, it could read C or E or B before D even comes around to it.
Therefore it has to be the magnetic disk because magnetic disks store data in concentric circles called tracks, which are broken up into sectors, the fact it is round and has a read/write head, and it is rotating, plus the fact it says Could be accessed... also gives it away.
Anyway, m/c I had:
1: B
2: C
3: A
4: D
5: B
6: A
7: D
8: C
9: B
10: D
11: B
12: C
13: C
14: A
15: B
16: A
17: C
18: D
19: C
20: C
