# What are the languages accepted by PDA?

## What are the languages accepted by PDA?

The languages which can be accepted by PDA are called context-free languages (CFL), denoted by LCF. Diagrammatically, a PDA is a finite state automaton (see Fig. 5.1), with memories (push-down stacks).

## Which of the following is accepted by an Npda and DPDA?

The language accepted by DPDA is called DCFL(Deterministic Context-free Language) which is a subset of NCFL(Non-deterministic Context-free Language) accepted by NPDA. The language accepted by NPDA is called NCFL(Non-deterministic Context-free Language).

**Which of the following is accepted by an Npda and not DPDA?**

Explanation: All regular languages can be accepted by a non deterministic finite automata and all context free languages can be accepted by a non deterministic push down automata.

**Which of the following can be accepted by a DPDA?**

7. Which of the following can be accepted by a DPDA? Explanation: Theorem: The language pal of palindromes over the alphabet {0,1} cannot be accepted by any finite automaton , and it is therefore not regular. Explanation:The possible change in the stack contents is a change in the number of A’s on the stack.

### Which of the following language Cannot be accepted by and Deterministic Push down automata?

L = pnqnrn it is not accepted by deterministic pushdown automaton and hence it is not a DCFL.

### Does PDA accept regular language?

Every regular language is accepted by some PDA (basically, just ignore the stack…) Idea: on input w, M nondeterministically picks a leftmost derivation of w from S. Stack holds intermediate strings in derivation (left end at top); letters in Σ on top of stack matched against input.

**Which class of language is accepted by PDA Mcq?**

Explanation: Push down automata is for Context free languages and they are termed as Type 2 languages according to Chomsky hierarchy.

**Which of the given languages are accepted by non deterministic PDA but not by deterministic PDA?**

L can be accepted by ϵ-Non-Deterministic finite automata. L can be accepted by Non-Deterministic Push down automata but not by Deterministic push down automata.

#### Which of the following can be accepted by DPDA palindrome string?

Discussion Forum

Que. | Which of the following can be accepted by a DPDA? |
---|---|

b. | The set of odd length palindrome over {a,b} |

c. | {xx^c| where c stands for the complement,{0,1}} |

d. | None of the mentioned |

Answer:None of the mentioned |

#### Which language is accepted by the pushdown automata Mcq?

regular languages

Thus, this pushdown automata can only accept languages which can also be accepted by finite state automata and a finite state automata accepts only regular languages. Thus, B is the correct choice.

**Which of the following language Cannot be accepted by and deterministic pushdown automata?**

**What is DPDA in automata?**

In automata theory, a deterministic pushdown automaton (DPDA or DPA) is a variation of the pushdown automaton. The class of deterministic pushdown automata accepts the deterministic context-free languages, a proper subset of context-free languages.