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Which of the following 4GLs invented at IBM and subsequently adopted by ANSI and ISO as the standard language for managing structured data?

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Which of the following 4GLs invented at IBM and subsequently adopted by ANSI and ISO as the standard language for managing structured data?

(a) SQL

(b) PROLOG

(c) C

(d) JAVA

I had been asked this question in an interview.

This intriguing question originated from Fourth Generation Techniques topic in section Software Processes, Models and Agile Software Development of Software Engineering

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Right option is (a) SQL

To elaborate: C & JAVA are third generation languages(3GLs) whereas PROLOG is a 5GL.

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