Computer scienceAlgorithms and Data StructuresAlgorithmsString algorithmsSubstring search algorithms

Prefix function

Statements about borders

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Which of the following statements about borders are correct?

Tip: Try to think of some example strings for each of the given statements, and see if that statement holds true. For example, string "aab" proves that one of the statements is false.

Select one or more options from the list

Every string has at least one border

b

such that

|b| > 0

If there is no border

b

in a string

s

such that

|b| > 0

, then all symbols of

s

are different.

A border of a string

s

is a substring

s^{\prime}

s

such that

s^{\prime} \ne s

and

s^{\prime}

is a suffix and a prefix of

s

If the substring

b

is the longest border of the string

s

, then the second longest border of

s

can be found as the longest border of its substring

b

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