The answer is a) It improves upon the two-phased commit by requiring that locks be acquired at the start of a transaction.
Reason: The 3PC is an extension or you can say developed from 2PC that avoids blocking of an operation. It just ensures that first n sites have intended to commit a transaction that means it acquires commits or locks before the start of any transaction to avoid any blocking.
Option b) is wrong as it does not allow coordination, it just let all the other sites do their transaction if any other site is blocked, so no coordination is there between sites that they will wait till their coordinator is corrected.
Option c) is wrong as lock operations are shared between other connections as when their coordinator fails, the new coordinator agrees to the old coordinator that they had shared locks before and they can start their transaction.
Option d) is wrong as option a) is correct.
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Answer:
i would say Plane, if not then Plane then the person's birthdate.
Explanation:
The smallest colorable area on a display would be a pixel
Create the computer, network, and communication systems that an organization needs
If any mistake was made using this type of primitive programming, the entire program of punch cards had to be re punched again. The correct option is A.
<h3>What is punch card?</h3>
A punch card is a card on which data is able to be recorded in the form of punched holes.
Whenever a mistake is done, the punched card is scrapped and made anew one for same programming.
Thus, if any mistake was made using this type of primitive programming. The entire program of punch cards had to be re punched again. The correct option is A.
Learn more about punch card.
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