On a daily basis, we use search engines
and directories as tools to find information on the web. However, the
difference is how they get and organize their information.
Search engines use small programs like
bots or spiders that search thoroughly through the internet, follow links, and
sends back information to the search engine’s index. Subject directories, on
the other hand, are human powered. Website owners submit their sites to
directories and human editors determine the value of the site and whether or
not it should be included in the directory.
Search engines use phrases and keywords
to locate information on the internet while subject directory allows users to
find information by using hierarchy.
Answer: Indexed
Explanation: Indexed property in the database system is for indexing .In this process reduction of the record/disk numbers results in the increase in the optimized performance. The structure of the index is in column form.
This technique rapidly provides the data from the table containing database when every query arises or requirement is proposed. Therefore the efficiency of the database increases.
Other options are incorrect because validation rule and text are regarding the verification of the data user and text respectively and expression is defined as the group of one or more value.Thus the correct option is indexed.
Malware is a generic term for "evil software". This comes from the words malicious (evil, or bad) and software