The component of the database that prevents both students from getting the last seat is: transaction isolation
Data that enters the database are expected to maintain accuracy and also be consistent with the database structure.
So, when both students request for the last seat, the possibilities are:
- <em>Student A gets the seat</em>
- <em>Student B gets the seat</em>
The following is not a possibility
- <em>Both students get the seat</em>
- <em>None of the students gets the seat</em>
The above highlights means that, only one of the students would get the seat.
This is possible because of the concept called transaction isolation.
The transaction isolation ensures that the data requested by a user is <em>complete </em>and such data maintains <em>competency</em>.
So, when a student gets the last seat, the <em>next student </em>would not get the same seat (<em>or any other seat</em>), because a transaction has already been completed.
Read more about transaction isolation at:
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Answer:
Key escrow.
Explanation:
If a full disk encryption (FDE) password is forgotten, a key escrow can be incorporated to securely store the encryption key to unlock the disk.
A key escrow can be defined as a data security method of storing very essential cryptographic keys.
Simply stated, key escrow involves a user entrusting his or her cryptographic key to a third party for storage.
As a standard, each cryptographic key stored or kept in an escrow system are directly linked to the respective users and are encrypted in order to prevent breach, theft or unauthorized access.
Hence, the cryptographic keys kept in an escrow system are protected and would not be released to anyone other than the original user (owner).
<em>Therefore, when a full disk encryption (FDE) password is forgotten, a key escrow if incorporated can be used to retrieve the password. Subsequently, the password would then be used to unlock or decrypt the disk.</em>
<span>The network services and facilities that users interact with are provided by authentication.</span>
Answer: 2. A version older than Excel 2016 was used to create the workbook .
Explanation: The compatibility mode appears whenever a workbook initially prepared using an excel software version which is older than the excel software which is used in opening the file or workbook. The compatibility mode is displayed due to the difference in software version where the original version used in preparing the workbook is older than the version used in opening the workbook. With compatibility mode displayed, new features won't be applied on the document.