Someone who has a broad understanding of computer technology and is able to use it well.

Someone who possesses digital literacy  has a broad understanding of computer technology and is able to use it well. The term digital literacy is used to denote range of skills (cognitive and technical) in the digital world. It encompasses a broader range of skills:  the ability to use information and communication technologies, the ability to evaluate, create, and communicate information.

answer(d) sequencing and iteration;

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