Question 19 Question text Two types of tokens that need to be identified by the Postfix Machine are operator and operand. -True -False
Question 19 Question text Two types of tokens that need to be identified by the Postfix Machine are operator and operand. -True -False
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question 17
Question text
What are the instruction needed if the Postfix Machine program detect an operand?
-pop two items from stack
-the expression is evaluated pushed the result onto the stack
-push it onto a stack
-print the top item from stack
Question 18
Question text
Why input string of the Postfix Machine need to be split into tokens?
-Easier to split string into two sub strings
-To split string into many single characters
-To split string into a list of sub strings
-To hold many types of data
Question 19
Question text
Two types of tokens that need to be identified by the Postfix Machine are operator and operand.
-True
-False
Question 20
Question text
What instructions needed if the Infix-Postfix Converter program detect the token is an operator?
-Immediately output the token.
-Pop all stack symbols until a symbol of lower precedence or a right-associative symbol of equal precedence appears.
-Pop all stack symbols until a symbol of lower precedence appears.
-Pop all stack symbols.
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