Context sensitive language can be recognized by a:

This question was previously asked in
UGC NET Computer Science (Paper 2) July 2018 Paper
View all UGC NET Papers >
  1. Finite state machine
  2. Deterministic finite automata
  3. Non-deterministic finite automata
  4. Linear bounded automata

Answer (Detailed Solution Below)

Option 4 : Linear bounded automata
Free
UGC NET Paper 1: Held on 21st August 2024 Shift 1
16.3 K Users
50 Questions 100 Marks 60 Mins

Detailed Solution

Download Solution PDF

Concept:

A grammar G = (V, T, S, P) is said to be context sensitive if all productions are of the form x → y where x, y, belongs to (V U T)+ and |x| ≤ | y|.

Languages that are generates from context sensitive grammar is known as context sensitive languages.

Relation between languages and their automaton.

Explanation:

  • Context sensitive languages are recognized with the help of linear bounded automata. A linear bounded automaton has an unbounded tape, but usable part of the tape is restricted as compared to Turing machine.
  •  In linear bounded automata, there are two end markers [ left end marker, right end marker ]. Read write head cannot move to the left or right of these markers.

Language L = {an bn cn: n > = 1}

  • It is accepted by linear bounded automata. It is a context sensitive language. A push down automata cannot accept this language.
As, it requires more than one stack which is available in linear bounded automata. In this, each a, b and c are replaced by x, y and z respectively. At the end, original symbols are checked if they are rewritten or not. 
Latest UGC NET Updates

Last updated on Jul 7, 2025

-> The UGC NET Answer Key 2025 June was released on the official website ugcnet.nta.ac.in on 06th July 2025.

-> The UGC NET June 2025 exam will be conducted from 25th to 29th June 2025.

-> The UGC-NET exam takes place for 85 subjects, to determine the eligibility for 'Junior Research Fellowship’ and ‘Assistant Professor’ posts, as well as for PhD. admissions.

-> The exam is conducted bi-annually - in June and December cycles.

-> The exam comprises two papers - Paper I and Paper II. Paper I consists of 50 questions and Paper II consists of 100 questions. 

-> The candidates who are preparing for the exam can check the UGC NET Previous Year Papers and UGC NET Test Series to boost their preparations.

More Context Free Languages and Pushdown Automata Questions

Get Free Access Now
Hot Links: teen patti gold download teen patti party teen patti cash game teen patti app teen patti real cash withdrawal