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:Screened Subnet Firewall
Explanation:Screened Subnet Firewalls is the firewall deploying mechanism that is used at the present time in the organizational area.It is used as because it is supposed to be a good option as it protects the networks and DMZ operating system from any kind of virus that can damage the connection. It works as the security section and protects the system.
With the ever-present rumor of ARM MacBooks<span> gaining renewed energy, it’s time to get an understanding of the technical differences between ARM processors and the more common x86 processors made by </span>Intel<span> and AMD.</span>
Answer:
Java in JavaScript does not correspond to any relationship with Java programming language.
Explanation:
The prefix Java in Javascript is there for historical reasons.
The original internal name of Javascript when it was created by Brendan Eich at Netscape was Mocha. This was released to public as Livescript in 1995. The name Livescript was eventually changed to Javascript in Netscape Navigator 2.0 beta 3 release in December 1995 after Netscape entered into an agreement with Sun Microsystem. The primary purpose of change of name seemed to be as a marketing aid to benefit from the growing popularity of Java programming language at that time.
Answer:
A. delete the message without opening it.
Explanation:
Never open emails you don't know who sent it, it could be a hacker trying to get your personal/financial information.