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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C.) Payroll records. These are the most extensive and data-intensive.
A yellow triangle with a exclamation mark might appear if a problem is detected with the device. Of course, this is different depending on the version of Windows you have.
Answer:
It gives the power of setting values and using them anywhere within the coding project without declaring them again.
Explanation:
What is a variable?
A variable is a name that a programmer gives to locations in a computer memory where values are stored and they need to be declared before usage.
Declaring a variable means that its data type must be defined and initial value set and creating your own variables gives the power of being able to set the variable once and use anywhere in the coding project without declaring it again.
