A system validates customer IDs of the form AB1234XY (exactly two uppercase letters, followed by four digits, followed by two uppercase letters). Which logic best ensures the required strict format matches?

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Computer Science · Regular Expressions

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

Use regex: ^[A-Z]{2}\d{4}[A-Z]{2}

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Answer 1

Check total length = 8 and use contains() for digits

Answer 2

Split the string and validate each part manually

Answer 3

Use regex: ^[A-Z]{2}\d{4}[A-Z]{2}

Answer 4

Use substring and compare ASCII values

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