MCQ On Stack - Data Structure

21. Which data structure is needed to convert infix notation to postfix notation?

A. Branch
B. Tree
C. Queue
D. Stack

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22. The prefix form of A-B/ (C * D ^ E) is?

A. -/*^ACBDE
B. -ABCD*^DE
C. -A/B*C^DE
D. -A/BC*^DE

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23. The postfix form of A*B+C/D is?

A. *AB/CD+
B. AB*CD/+
C. A*BC+/D
D. ABCD+/*

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24.What is the result of the following operation
Top (Push (S, X))

A. X
B. Null
C. S
D. None of the mentioned

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25.The prefix form of an infix expression p + q – r * t is?

A. + pq – *rt
B. – +pqr * t
C. – +pq * rt
D. – + * pqrt

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