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Which of these is wildcard symbol?

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Which of these is wildcard symbol? (a) ? (b) ! (c) % (d) & I have been asked this question in an interview for internship. This question is from Wildcards in section Generics of Java Select the correct answer from above options JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

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The correct choice is (a) ? To elaborate: In generic code, the question mark (?), called the wildcard, represents an unknown type.

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