Formal Languages: Questions And Answers

Explore Questions and Answers to deepen your understanding of formal languages.

80 Short 63 Medium 57 Long Answer Questions Question Index

Short Answer Questions

Question 1. What is a formal language?

Question 2. What are the applications of formal languages?

Question 3. What is the difference between a formal language and a natural language?

Question 4. What is the Chomsky hierarchy of formal languages?

Question 5. What are the four types of grammars in the Chomsky hierarchy?

Question 6. What is a regular language?

Question 7. What is a context-free language?

Question 8. What is a context-sensitive language?

Question 9. What is a recursively enumerable language?

Question 10. What is the difference between a regular language and a context-free language?

Question 11. What is the difference between a context-free language and a context-sensitive language?

Question 12. What is the difference between a context-sensitive language and a recursively enumerable language?

Question 13. What is a formal grammar?

Question 14. What are the components of a formal grammar?

Question 15. What is a production rule in a formal grammar?

Question 16. What is the start symbol in a formal grammar?

Question 17. What is a derivation in a formal grammar?

Question 18. What is a parse tree in a formal grammar?

Question 19. What is the difference between a leftmost derivation and a rightmost derivation?

Question 20. What is the language generated by a formal grammar?

Question 21. What is the difference between a regular grammar and a context-free grammar?

Question 22. What is the difference between a context-free grammar and a context-sensitive grammar?

Question 23. What is the difference between a context-sensitive grammar and a recursively enumerable grammar?

Question 24. What is a regular expression?

Question 25. What are the basic operations on regular expressions?

Question 26. What is the difference between a regular expression and a regular language?

Question 27. What is a finite automaton?

Question 28. What are the types of finite automata?

Question 29. What is a deterministic finite automaton (DFA)?

Question 30. What is a non-deterministic finite automaton (NFA)?

Question 31. What is the difference between a DFA and an NFA?

Question 32. What is an epsilon-NFA?

Question 33. What is the difference between an NFA and an epsilon-NFA?

Question 34. What is a pushdown automaton (PDA)?

Question 35. What is the difference between a PDA and a finite automaton?

Question 36. What is a Turing machine?

Question 37. What are the components of a Turing machine?

Question 38. What is the difference between a Turing machine and a pushdown automaton?

Question 39. What is the halting problem?

Question 40. What is the Church-Turing thesis?

Question 41. What is the difference between a recursively enumerable language and a recursive language?

Question 42. What is the pumping lemma for regular languages?

Question 43. What is the pumping lemma for context-free languages?

Question 44. What is the pumping lemma for context-sensitive languages?

Question 45. What is the pumping lemma for recursively enumerable languages?

Question 46. What is the difference between a regular language and a recursively enumerable language?

Question 47. What is the difference between a context-free language and a recursively enumerable language?

Question 48. What is the difference between a deterministic finite automaton and a non-deterministic finite automaton?

Question 49. What is the difference between a deterministic finite automaton and a pushdown automaton?

Question 50. What is the difference between a deterministic finite automaton and a Turing machine?

Question 51. What is the difference between a non-deterministic finite automaton and a pushdown automaton?

Question 52. What is the difference between a non-deterministic finite automaton and a Turing machine?

Question 53. What is the difference between a pushdown automaton and a Turing machine?

Question 54. What is the difference between a context-free grammar and a regular grammar?

Question 55. What is the difference between a context-free grammar and a recursively enumerable grammar?

Question 56. What is the difference between a regular expression and a regular grammar?

Question 57. What is the difference between a regular expression and a context-free grammar?

Question 58. What is the difference between a regular expression and a context-sensitive grammar?

Question 59. What is the difference between a regular expression and a recursively enumerable grammar?

Question 60. What is the difference between a regular language and a context-free grammar?

Question 61. What is the difference between a regular language and a context-sensitive grammar?

Question 62. What is the difference between a regular language and a recursively enumerable grammar?

Question 63. What is the difference between a context-free language and a context-sensitive grammar?

Question 64. What is the difference between a context-free language and a recursively enumerable grammar?

Question 65. What is the difference between a context-sensitive language and a recursively enumerable grammar?

Question 66. What is the difference between a deterministic finite automaton and a context-free grammar?

Question 67. What is the difference between a deterministic finite automaton and a context-sensitive grammar?

Question 68. What is the difference between a deterministic finite automaton and a recursively enumerable grammar?

Question 69. What is the difference between a non-deterministic finite automaton and a context-free grammar?

Question 70. What is the difference between a non-deterministic finite automaton and a context-sensitive grammar?

Question 71. What is the difference between a non-deterministic finite automaton and a recursively enumerable grammar?

Question 72. What is the difference between a pushdown automaton and a context-free grammar?

Question 73. What is the difference between a pushdown automaton and a context-sensitive grammar?

Question 74. What is the difference between a pushdown automaton and a recursively enumerable grammar?

Question 75. What is the difference between a Turing machine and a context-free grammar?

Question 76. What is the difference between a Turing machine and a context-sensitive grammar?

Question 77. What is the difference between a Turing machine and a recursively enumerable grammar?

Question 78. What is the difference between a recursively enumerable language and a context-free language?

Question 79. What is the difference between a recursively enumerable language and a context-sensitive language?

Question 80. What is the difference between a recursive language and a context-free language?

Medium Answer Questions

Question 1. What is a formal language?

Question 2. What are the applications of formal languages?

Question 3. Explain the concept of regular languages.

Question 4. What is the difference between a regular language and a context-free language?

Question 5. Describe the Chomsky hierarchy of formal languages.

Question 6. What is the pumping lemma for regular languages?

Question 7. Explain the concept of context-free languages.

Question 8. What is a context-free grammar?

Question 9. What is the difference between a context-free grammar and a regular grammar?

Question 10. What is the pumping lemma for context-free languages?

Question 11. Explain the concept of context-sensitive languages.

Question 12. What is a context-sensitive grammar?

Question 13. What is the difference between a context-sensitive grammar and a context-free grammar?

Question 14. What is the pumping lemma for context-sensitive languages?

Question 15. Explain the concept of recursively enumerable languages.

Question 16. What is a recursively enumerable grammar?

Question 17. What is the difference between a recursively enumerable grammar and a context-sensitive grammar?

Question 18. What is the pumping lemma for recursively enumerable languages?

Question 19. What is the difference between a recursively enumerable language and a recursively enumerable set?

Question 20. Explain the concept of Turing machines.

Question 21. What is the Church-Turing thesis?

Question 22. What is the halting problem?

Question 23. Explain the concept of decidability.

Question 24. What is the difference between decidability and semi-decidability?

Question 25. What is the Rice's theorem?

Question 26. Explain the concept of undecidability.

Question 27. What is the difference between decidability and undecidability?

Question 28. What is the Post correspondence problem?

Question 29. Explain the concept of formal language parsing.

Question 30. What is the difference between top-down parsing and bottom-up parsing?

Question 31. What is the LL(1) parsing algorithm?

Question 32. What is the LR(0) parsing algorithm?

Question 33. What is the SLR(1) parsing algorithm?

Question 34. What is the LALR(1) parsing algorithm?

Question 35. What is the LR(1) parsing algorithm?

Question 36. What is the difference between LR(0) and LR(1) parsing?

Question 37. Explain the concept of ambiguity in formal languages.

Question 38. What is an ambiguous grammar?

Question 39. What is the difference between an ambiguous grammar and an unambiguous grammar?

Question 40. What is the concept of ambiguity in parsing?

Question 41. What is the difference between a shift-reduce conflict and a reduce-reduce conflict?

Question 42. What are the basic operations on regular expressions?

Question 43. What is the difference between regular expressions and regular languages?

Question 44. Explain the concept of finite automata.

Question 45. What are the types of finite automata?

Question 46. What is the difference between a deterministic finite automaton and a non-deterministic finite automaton?

Question 47. What is the concept of minimization in finite automata?

Question 48. Explain the concept of pushdown automata.

Question 49. What is the difference between a deterministic pushdown automaton and a non-deterministic pushdown automaton?

Question 50. What is the concept of context-free parsing?

Question 51. What is the difference between top-down parsing and bottom-up parsing in context-free parsing?

Question 52. Explain the concept of pumping lemma for regular languages.

Question 53. What is the difference between a regular expression and a regular grammar?

Question 54. What is the concept of closure properties in formal languages?

Question 55. What are the closure properties of regular languages?

Question 56. What are the closure properties of context-free languages?

Question 57. What are the closure properties of context-sensitive languages?

Question 58. What are the closure properties of recursively enumerable languages?

Question 59. Explain the concept of pumping lemma for context-free languages.

Question 60. What is the difference between a context-free language and a recursively enumerable language?

Question 61. What is the concept of pumping lemma for context-sensitive languages?

Question 62. What is the difference between a context-sensitive language and a recursively enumerable language?

Question 63. Explain the concept of pumping lemma for recursively enumerable languages.

Long Answer Questions

Question 1. What is a formal language?

Question 2. What are the applications of formal languages?

Question 3. Explain the concept of regular languages.

Question 4. What is the difference between a regular language and a context-free language?

Question 5. Describe the Chomsky hierarchy of formal languages.

Question 6. What is the pumping lemma for regular languages?

Question 7. Explain the concept of context-free languages.

Question 8. What are the properties of context-free languages?

Question 9. What is the pumping lemma for context-free languages?

Question 10. Describe the concept of pushdown automata.

Question 11. What is the difference between a deterministic pushdown automaton and a nondeterministic pushdown automaton?

Question 12. Explain the concept of Turing machines.

Question 13. What are the properties of recursively enumerable languages?

Question 14. What is the halting problem?

Question 15. Describe the concept of formal grammars.

Question 16. What are the types of formal grammars?

Question 17. Explain the concept of regular expressions.

Question 18. What are the operations that can be performed on regular expressions?

Question 19. Describe the concept of finite automata.

Question 20. What are the types of finite automata?

Question 21. Explain the concept of context-sensitive languages.

Question 22. What are the properties of context-sensitive languages?

Question 23. Describe the concept of pushdown automata with context-sensitive languages.

Question 24. What is the difference between a deterministic pushdown automaton and a nondeterministic pushdown automaton for context-sensitive languages?

Question 25. Explain the concept of recursively enumerable languages.

Question 26. Describe the concept of Turing machines with recursively enumerable languages.

Question 27. What is the difference between a deterministic Turing machine and a nondeterministic Turing machine for recursively enumerable languages?

Question 28. Explain the concept of regular sets.

Question 29. What are the operations that can be performed on regular sets?

Question 30. Describe the concept of context-free sets.

Question 31. What are the operations that can be performed on context-free sets?

Question 32. Explain the concept of context-sensitive sets.

Question 33. What are the operations that can be performed on context-sensitive sets?

Question 34. Describe the concept of recursively enumerable sets.

Question 35. What are the operations that can be performed on recursively enumerable sets?

Question 36. Explain the concept of decidable languages.

Question 37. What are the properties of decidable languages?

Question 38. Describe the concept of undecidable languages.

Question 39. What are the properties of undecidable languages?

Question 40. Explain the concept of formal language parsing.

Question 41. What are the different parsing techniques for formal languages?

Question 42. Describe the concept of ambiguity in formal languages.

Question 43. What are the methods to resolve ambiguity in formal languages?

Question 44. Explain the concept of regular expressions in programming languages.

Question 45. What are the uses of regular expressions in programming languages?

Question 46. Describe the concept of context-free grammars in programming languages.

Question 47. What are the uses of context-free grammars in programming languages?

Question 48. Explain the concept of lexical analysis in programming languages.

Question 49. What are the uses of lexical analysis in programming languages?

Question 50. Describe the concept of syntax analysis in programming languages.

Question 51. What are the uses of syntax analysis in programming languages?

Question 52. Explain the concept of semantic analysis in programming languages.

Question 53. What are the uses of semantic analysis in programming languages?

Question 54. Describe the concept of code generation in programming languages.

Question 55. What are the uses of code generation in programming languages?

Question 56. Explain the concept of code optimization in programming languages.

Question 57. What are the uses of code optimization in programming languages?