MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -A regular expression can also be described as a sequence of pattern that defines a string. Regular expressions are used to match character combinations in strings. String searching algorithm used this pattern to find the operations on a string.

Detailed explanation-2: -A regular expression (aka regex) is a sequence of characters that define a search pattern, mainly for use in pattern matching with text strings. Typically, regex patterns consist of a combination of alphanumeric characters as well as special characters.

Detailed explanation-3: -A regular expression is a pattern that the regular expression engine attempts to match in input text. A pattern consists of one or more character literals, operators, or constructs.

Detailed explanation-4: -What kind of expressions do we used for pattern matching? Explanation: In automata theory, Regular Expression(sometimes also called the Rational Expression ) is a sequence or set of characters that define a search pattern, mainly for the use in pattern matching with strings or string matching. 2.

Detailed explanation-5: -A regular expression is a method used in programming for pattern matching. Regular expressions provide a flexible and concise means to match strings of text. For example, a regular expression could be used to search through large volumes of text and change all occurrences of “cat” to “dog".