ISRO | ISRO CS 2020 | Question 74

Which of the following classes of languages can validate an IPv4 address in dotted decimal format? It is to be ensured that the decimal values are between 0 and 255
(A) RE and higher
(B) CFG and higher
(C) CSG and higher
(D) Recursively enumerable language


Answer: (A)

Explanation:

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