Mealy and Moore Machine

 Mealy Machine – A mealy machine is defined as 6 tuples (Q, q0, ∑, Δ, δ, λ’) 

Q - finite non empty set of states 

q0 - initial state 

∑-  input alphabet or terminals 

Δ - output alphabet 

δ - transition function δ:Q×∑ → Q 

λ - output function λ: Q×∑→ O 

Moore Machine – A moore machine is defined as 6 tuples (Q, q0, ∑, Δ, δ, λ’) 

Q - finite non empty set of states 

q0 - initial state 

∑-  input alphabet or terminals 

Δ - output alphabet 

δ - transition function δ:Q×∑ → Q 

λ - output function λ: Q→O 


1. Moore Machine is :

a) FA without input

b) FA with output

c) NDFA with input

d) None of the above

Answer: b

Explanation: Finite automaton with an output is 

categorized in two parts: Moore M/C and Mealy M/C.

2.Which of the following is uesd as  output alphabet 

in moore machine?

a) δ

b) ∆

c) ∑

d) None of the above

Answer-b

3.Which of the following produce output for moore machine?

 a) λ: Q→O

b) λ: Q×∑→ O

c) both a and b

d) none of the above

4.The Output of Moore machine depends on

a) only inputs

b) only states

c) Both

d) None of the above

Answer: b

5. The Output of  mealy machine depends on

a) only State

b) only inputs

c) State and Input

d) none

Answer: c

Explanation: Definition of Mealy Machine.

6.Which of the statements are correct?

a) Moore machine has 5-tuples

b) Mealy machine has 7-tuples

c) Both Mealy and Moore has 6-tuples

d) None 

Answer: c


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