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How many stacks are required for evaluation of prefix expression?

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+1 vote
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in Data Structures & Algorithms I by (111k points)
How many stacks are required for evaluation of prefix expression?

(a) one

(b) two

(c) three

(d) four

The doubt is from Application of Stacks in section Application of Stacks of Data Structures & Algorithms I

The question was posed to me during a job interview.

1 Answer

+2 votes
by (506k points)
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Best answer
Correct choice is (b) two

The best explanation: 2 stacks are required for evaluation of prefix expression, one for integers and one for characters.

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