题目内容
A _________ is a computer hacker who is hired by an organization to undertake nonmalicious hacking work in order to discover computer-security flaws
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A___________ is a computer hacker who carries out illegal malicious hacking work.
__________ are instructions that are hidden within a computer program and are designed to cause faults or destroy data.
A __________is a piece of computer software which enables a website you have visited to recognize you if you visit it again.
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