Pearson eText for Concepts of Programming Languages -- Instant Access (Pearson+)
12th Edition
ISBN: 9780135102268
Author: Robert Sebesta
Publisher: PEARSON+
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Chapter 4, Problem 22RQ
Explanation of Solution
Mathematical machine on which both top-down and bottom up parsers:
- PDA can be considered as a mathematical machine which scans the input symbols from left to right.
- Since it uses a pushdown stack as the memory and hence the name.
- PDA is used to recognize languages of a context free grammar. That is it can determine whether the input string is a sentence of the context free language...
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What is the name of the mathematical machine that both top-down and bottom-up parsers are built on?
What is the mathematical machine on which both top-down and bottomup parsers are based?
Why are pass-by-value and pass-by-reference constructs required in modern programming languages? Why can't we just choose one of the two possibilities? Please describe the benefits of having both in your answer, as well as the reasons why it would be foolish to have just one or the other.
Chapter 4 Solutions
Pearson eText for Concepts of Programming Languages -- Instant Access (Pearson+)
Ch. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - Prob. 10RQ
Ch. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Prob. 15RQCh. 4 - Prob. 16RQCh. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - Prob. 19RQCh. 4 - Prob. 20RQCh. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - What was Knuths insight in developing the LR...Ch. 4 - Prob. 25RQCh. 4 - Prob. 26RQCh. 4 - Is left recursion a problem for LR parsers?Ch. 4 - Prob. 1PSCh. 4 - Prob. 2PSCh. 4 - Prob. 3PSCh. 4 - Prob. 4PSCh. 4 - Prob. 7PSCh. 4 - Prob. 8PS
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- This is a definition of explanatory language:arrow_forwardWhy is it vital for today's programming languages to have both pass-by-value and pass-by-reference constructs? Why is it that we can't just choose one of these? Please address both the benefits of having both and the drawbacks of having either alone in your answer.arrow_forwardIs there any reason why modern programming languages can't do without pass-by-value and pass-by-reference constructs? Why is it that we can't just choose one of these? Please address the benefits of having both and the drawbacks of having either alone in your answer.arrow_forward
- In terms of readability, what is the key difference between declarative and imperative languages?arrow_forwardHow can type inferencing still be part of a language with strong typing?arrow_forwardWhy do compilers perform optimizations in code and why do compilers use Abstract Syntax Trees instead of Parse Tree?arrow_forward
- Why is it essential for today's programming languages to provide both pass-by-value and pass-by-reference constructs? Why can't we merely choose between the two options? In your response, please explain both the advantages of having both and the reasons why it would be unwise to have just one or the other.arrow_forwardIs there a significant distinction between the declarative and functional programming paradigms and the procedural and imperative programming paradigms?arrow_forwardHow can type inferencing exist in a language with good typing?arrow_forward
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