Q. A regular expression enables a quick test to determine objects and text strings with undependable values.

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Q. RE can be used only for values of type string and number.

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Q. You can use RE, if you expect the value of a property to change in an unpredictable way each time its run.

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Q. ___________ Are automatically treated as regular expressions.

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Q. If a ‘/’ is used before a character that has no special meaning, ‘/’ is ignored.

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Q. String generated by
S->aS/bA,

A->d/ccA

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Q. If R is regular language and Q is any language (regular/ non regular), then Pref (Q in R) is _____________

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Q. The production of the form no terminal → Λ is said to be null production.

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Q. R is said to be reflexive if aRa is true for every a in A;

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Q. If every aRb implies bRa then a relation R will be a symmetric relation.

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Q. If every aRb and bRc implies aRc, then the relation is transitive

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Q. If a set A has n elements, then the total number of subsets of A is.

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Q. The number of proper subsets of the set {1, 2, and 3} is.

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Q. If A, B and C are any three sets, then A × (B ∪ C) is equal to.

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