Computer based testing uses computers and networks as the medium for delivering questions and collecting responses. Test items may be objective or short-answer, and responses are stored electronically. Systems can automatically score many question types and generate reports quickly. The described scenario matches these characteristics, so it is the best example of CBT.
Option A:
Paper-based exams do not involve ICT for question delivery or response capture. While common, they do not qualify as computer based testing.
Option B:
Oral exams conducted informally without records are not CBT and lack the standardised electronic environment described in the question.
Option C:
Mailing handwritten scripts by post is a traditional correspondence method and does not involve computer-based interfaces or automated scoring.
Option D:
This option correctly describes students using networked computers with exam software and time constraints, reflecting current CBT practices in many universities and entrance examinations.
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