The statement, "The amount of magnification gained from the extension tube is dependent on the focal length of the lens" is true.
The DTD makes specific declarations about which elements and attributes may exist in a document and how they should be nested using a brief formal syntax.
A XML language can be defined in a variety of ways. Simple prose, a so-called Schema language, or eventually a combination of the two could be used to specify an XML vocabulary. The XML Standard defines DTDs, the most basic schema language.
The term "Document Type Definition" is used. A DTD is a language made up of rules (also known as a schema) that describes an XML application, also known as an XML vocabulary. For instance, the grammar for the XHTML 1 web markup language is formally defined in the file xhtml1-transitional.dtd, which is accessible through the XHTML 1.0 specification page.
The DTD itself is typically the most crucial component of a DTD-based markup language, but additional constraints can be included as well.
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<span>A batch processing system is the execution of a series of jobs in a program on a computer without manual intervention</span>
Answer:
The user's account is blocked due to several unsuccessful login attempts.
Explanation:
Any device having a password security has a property of blocking the account or device in use after noticing several unsuccessful attempts of login.
So as a precautionary measure when the software notices such activity it blocks the access to that account so that any intruder might not be able to enter the account premises.
Same is the case with the employee who was trying to access his own account but due the expired password he made several attempts but couldn't log in. The software took it as an intruder and blocked the account.
The employee after requesting for password reset again tried to login but the account was blocked so he could not be able to access it again.
