##### MCQ Computer Science

# Compilers Questions and Answers – Transformation from NFA to DFA

This set of Compilers Multiple Choice Questions & Answers (MCQs) focuses on “Transformation from NFA to DFA ”.

- Can a DFA simulate NDFA

a) No

b) Yes

c) Sometimes

d) Depends on NDFA

### Answer

Answer: b

Explanation: Yes it can be done through power set construction.

2. Find the wrong statement?

a) The language accepted by finite automata are the languages denoted by regular expression

b) Every DFA has a regular expression denoting its language

c) For a regular expression r, there does not exists NDFA with L® ant transit that accept

d) None of the mentioned

### Answer

Answer: c

Explanation: The vice versa is true.

3. Regular expression a/b denotes the set

a) {a}

b) {€,a,b}

c) {a,b}

d) {ab}

### Answer

Answer: c

Explanation: Either a is the output or b hence it’s {a, b}.

4. The behaviour of a NFA can be stimulated by DFA

a) Always

b) Sometimes

c) Never

d) Depends on NFA

### Answer

Answer: a

Explanation: It can be done through power set construction.

5. For any DFA state {qi,qj…qm} If some qj is a final state in the NFA Then {qi,qj…qm}, is a final state in the DFA.True or False

a) True

b) False

### Answer

Answer: a

Explanation: It the the standard procedure to convert NFA to DFA.

6. The relation between NFA-accepted languages and DFA accepted languages is

a) >

b) <

c) =

d) <=

### Answer

Answer: c

Explanation: The no of languages accepted by NFA and DFA is equal.

7. In regular expressions, the operator ‘*’ stands for

a) Concatenation

b) Selection

c) Iteration

d) Addition

### Answer

Answer: c

Explanation: It indicates iterations which can vary from zero to any number.