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Who invented d-ary heap?

(a) Carl Rick

(b) Alan Turing

(c) Donald Johnson

(d) Euclid

Question is from Ternary Heap topic in chapter Heap of Data Structures & Algorithms I

I had been asked this question in a job interview.

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The correct answer is (c) Donald Johnson

The explanation is: Ternary heap is a type of data structure in the field of computer science. It is a part of the Heap data structure family. The d-ary heap was invented by Donald Johnson in the year 1975.

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