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Programming Logic & Design Comprehensive

Programming Logic & Design Comprehensive

9th Edition

ISBN:9781337669405

Author:FARRELL

Publisher:FARRELL

Chapter2: Elements Of High-quality Programs

Section: Chapter Questions

Problem 8RQ

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Question

Which of the following statements are accurate:
A. Many programming languages can be described by means of DCFLs.
B. Every NPDA can be converted to a DPDA
C. The languages accepted by DPDA are called DCFL (Deterministic Context Free Languages) which are sub
set of NCFL (Non Deterministic CFL) accepted by NPDA.
☐ B
☐ None of A, B, C
☐ C
☐ A

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Quèstion 3 Which of the following does not hold up both readability and reliability of a programming language? Orthogonality Aliasing Type-checking Operator overloading
(a) Design an NFA for the following language. (No proof is required for this part) A= {x{a,b} | |x|22, the first two letters of a read the same as its last two letters} For example, aa € A, aabaa € A, abbba & A. (b) Design a DFA for A using the subset construction game applied to the NFA.
1. Prove that the following language is not context-free: {a'b'd | j>?>0}
2) Give examples of each of the following: a) A language that is not context free. b) A language that is context free but not deterministic context free. c) A language that is accepted by a deterministic pushdown automaton but is not regular.
1. Prove that the following language is not context-free: {d'b'c' | j>?>0}
5. Show that the following language is not context free. L = {a"b'|n < j²}
Multiple Choice Give the best description for the language: {aibj | i ≤ j} a) Decidable b) Undecidable c) Regular d) Context-Free
8. Explain the concept of operator precedence and associativity in programming languages. How does understanding these concepts aid in writing and interpreting complex expressions?
What does it imply for a collection of language characteristics to be orthogonal (for example, a type system)?
b) What is the language that the following CFG generate? (describe by RE) S>aXa S>bXb X>aX XbX
Only dynamically scoped programming languages that support nested subprograms need closures. True False
What does it mean for a set of language features (e.g., a type system) to be orthogonal?

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