Question:
Which one of the following statements is true?
Which one of the following statements is true?
Show Hint
N/A
Updated On: May 3, 2025
- The intersection of two context free languages is context free
- A context free language is accepted by a Deterministic Push Down Automaton
- The union of two context free languages is context free
- The complement of a context free language is context free
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
- Option 1: The intersection of two context free languages is not necessarily context free, as context free languages are not closed under intersection.
- Option 2: Not all context free languages can be accepted by a deterministic push down automaton, as deterministic pushdown automata only accept a subset of context free languages.
- Option 3: The union of two context free languages is indeed context free, as context free languages are closed under union.
- Option 4: The complement of a context free language is not necessarily context free, as context free languages are not closed under complementation.
Therefore, the correct answer is 3. The union of two context free languages is context free.
- Option 2: Not all context free languages can be accepted by a deterministic push down automaton, as deterministic pushdown automata only accept a subset of context free languages.
- Option 3: The union of two context free languages is indeed context free, as context free languages are closed under union.
- Option 4: The complement of a context free language is not necessarily context free, as context free languages are not closed under complementation.
Therefore, the correct answer is 3. The union of two context free languages is context free.
Was this answer helpful?
0
0
Top Questions on Programming Languages
- How many times “Hi” message will be displayed when we execute the following for loop?
int i;
for(i=0;i%2==0;i++)}
printf("Hi \n");- AP PGECET - 2025
- Computer Science & Information Technology
- Programming Languages
- Which programming language is used for web development?
- TG EDCET - 2025
- Computer Awareness
- Programming Languages
- Given the following information with respect to a high level programming language:
a. Easier to use.
b. Uses English-like words and familiar mathematical symbols.
c. Computer cannot understand high level language programs. Which of the following is correct?- Karnataka PGCET - 2024
- Computer Awareness
- Programming Languages
- Given the following information with respect to Third and Fourth generation languages: \begin{itemize} \item S1: Both are non portable. \item S2: Third generation languages are mostly compiled languages. \item S3: Fourth generation languages are in line with minimum work and skill concept. \item S4: Third generation languages are user-friendly and have intelligent default options. \end{itemize} Which of the following is correct?
- Karnataka PGCET - 2024
- Computer Awareness
- Programming Languages
- Given the following Lists:
Identify the correct match.- Karnataka PGCET - 2024
- Computer Awareness
- Programming Languages
View More Questions
Questions Asked in AP PGECET exam
- Given \( x_0 \neq 0 \), the iteration \[ x_{n+1} = \frac{1}{2} \left( -\frac{9}{x_n} + x_n \right), n \geq 0 { is a} \]
- AP PGECET - 2025
- Numerical Methods
- Suppose \( \sum_{n=1}^{\infty} a_n (x - 2)^n \) is convergent at \( x = -5 \), then it need not be convergent on which interval?
- AP PGECET - 2025
- Convergence tests
- The set of all critical points of the function \( f(x) = |x^2 - 1| \) on \( [-2, 2] \) is ...........
- AP PGECET - 2025
- Calculus
The surface integral \( \int_S x^2 \, dS \) over the upper hemisphere
\[ z = \sqrt{1 - x^2 - y^2} \]
with radius 1 is ..........- AP PGECET - 2025
- Calculus
- Consider the system of equations:
\[ x + 2y - z = 3 \\ 2x + 4y - 2z = 7 \\ 3x + 6y - 3z = 9 \]
Which of the following statements is true about the system?
- AP PGECET - 2025
- Linear Algebra
View More Questions