Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Which of the following option is/are false?a)...
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Which of the following option is/are false?
- a)A lexeme is any sequence of binary character.
- b)Lexical analysis and parsing are put as two different phases so as to enhance portability.
- c)A DFA can not have a isolated State.
- d)Symbol table can be implemented by using linked list and Binary search trees.
Correct answer is option 'C,D'. Can you explain this answer?
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Most Upvoted Answer
Which of the following option is/are false?a)A lexeme is any sequence ...
False Options in the Given Statement
Option C: A DFA can not have an isolated State.
Option D: Symbol table can be implemented by using linked list and Binary search trees.
Explanation
Option C: A DFA can not have an isolated State.
A Deterministic Finite Automaton (DFA) can indeed have an isolated state. An isolated state in a DFA is a state that does not have any outgoing transitions. This can occur in certain cases, such as when a particular input is not defined or when the DFA reaches a final state and no further transitions are possible.
Option D: Symbol table can be implemented by using linked list and Binary search trees.
A symbol table is a data structure used by compilers and interpreters to store and retrieve information about symbols (e.g., variable names, function names) in a program. While it is possible to implement a symbol table using linked lists or binary search trees, it is not the only way to do so.
Other data structures such as hash tables or balanced search trees can also be used to implement a symbol table. The choice of data structure depends on factors such as the expected size of the symbol table, the expected number of lookups and insertions, and the desired time complexity for these operations.
Overall, option C and option D are false statements. A DFA can have an isolated state, and a symbol table can be implemented using various data structures, not just linked lists and binary search trees.
Option C: A DFA can not have an isolated State.
Option D: Symbol table can be implemented by using linked list and Binary search trees.
Explanation
Option C: A DFA can not have an isolated State.
A Deterministic Finite Automaton (DFA) can indeed have an isolated state. An isolated state in a DFA is a state that does not have any outgoing transitions. This can occur in certain cases, such as when a particular input is not defined or when the DFA reaches a final state and no further transitions are possible.
Option D: Symbol table can be implemented by using linked list and Binary search trees.
A symbol table is a data structure used by compilers and interpreters to store and retrieve information about symbols (e.g., variable names, function names) in a program. While it is possible to implement a symbol table using linked lists or binary search trees, it is not the only way to do so.
Other data structures such as hash tables or balanced search trees can also be used to implement a symbol table. The choice of data structure depends on factors such as the expected size of the symbol table, the expected number of lookups and insertions, and the desired time complexity for these operations.
Overall, option C and option D are false statements. A DFA can have an isolated state, and a symbol table can be implemented using various data structures, not just linked lists and binary search trees.
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Community Answer
Which of the following option is/are false?a)A lexeme is any sequence ...
Lexeme: A lexeme is any sequence of characters, defining a token.
As we know,
Option (A): A lexeme is any sequence of binary character.
Option (B): Lexical analysis and parsing are put as two different phases so as to make design simple, improve efficiency and enhance portability.
False options are:
Option (C): DFA does not allow to have an isolated state is false because DFA allows having an isolated state.
Option (D): A symbol table can be implemented by using a linked list and binary search trees is false because a symbol table can be implemented in one of the following ways: Linear (sorted or unsorted) list.
Hence, the correct options are (C) and (D).
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Which of the following option is/are false?a)A lexeme is any sequence of binary character.b)Lexical analysis and parsing are put as two different phases so as to enhance portability.c)A DFA can not have a isolated State.d)Symbol table can be implemented by using linked list and Binary search trees.Correct answer is option 'C,D'. Can you explain this answer?
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