Answer:
"The question mark quantifier "?" will match the preceding element exactly one time" is the correct answer to the given question .
Explanation:
The Quantifiers are defined as it determine how the several occurrences of a set of symbols, categories, or the characters should be found throughout the input to searching the matches.
- The * quantifier in the regular expression corresponds the zero or more then zero to the previous item. it is represented by {0,} quantifier
- The + quantifier in the regular expression appears to fit in one or more times with the previous item. it equates with {1} quantifier.
- The? Quantifier in regular expression compares zero or once of a previous item. It equates with {0,1}.
- All the option are true regarding regular expression quantifiers so these option are incorrect according to the question
Older systems that often contain data of poor quality are called Legacy systems.
<h3>What are Legacy systems?</h3>
A legacy system is known to be a kind of an outdated computing software and it is known to be called an hardware that is said to be old but still in use.
Note that system is one that tends to meets the requirement that it was originally made for, but it is one that do not allow room for growth.
Therefore, based on the above, the Older systems that often contain data of poor quality are called Legacy systems.
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Its gonna be mass because we use the measurement in grams