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UNIT- 03

                                                                PROPOSITIONAL LOGIC

Unit-03/Lecture-01

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 278-290}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

Explain the following terms used with proposition

(i) Logical connectives    (ii) Biconditional

June 2013

4

 

Q. 2

State and prove Demorgan’s laws

Dec 2012

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROBLEMS ON TAUTOLOGY

Unit-03/Lecture-02

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 290-294}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

Is the formula tautology

P -> (p ^ (q-> p))

Dec 2008

5

 

Q.  2

Show that (p ^ q) -> (p  v q) is a tautology

Dec 2008

5

Q. 3

Prove that (p ó q) ^ (q ó r)  => (p ó r) is a tautology

Dec 2006

5

Q.4

Define tautology and contradiction show that

P => (q => r) Ξ (p ^ q) =>r

Dec 2012

7

Q.5

Show that the following is equivalent formula

P v (p ^ q) ó p

June 2005

7

Q. 6

Construct the truth table for the following

(p -> (q -> r)) -> ((p->q)-> (p-> r))

Dec 2008

7

Q.7

Prove by truth table that the following formula is tautology

(p ó (q ^ r)) => (~r => ~p)

June 2009

Dec 2010

7

Q.8

Prove that the following is tautologies or contradiction or contingency

(p v q) ^ {p v ~q} ^ {~p v q} ^ {~p v ~q}

Dec 2011

7

Q.9

Is (P v Q) ^ (P -> R)^ (Q->R) => R ,

Tautology or contradiction

June 2012

7

Q.10

Prove that the proposition (p v ~q)^(~p v ~q) v q is a tautology

June 2014

2

Q.11

Prove that the propositions  p v (~q ^ r) and (p v ~q) v ~r are equivalent.

June 2014

2

 

 

 

 

 

 

 

 

 

CONVERSE, INVERSE AND CONTRAPOSITIVE PROPOSITION

Unit-03/Lecture-03

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 294-296}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

Determine whether each of following is a tautology, contradiction or contingency

(i)( P-> Q) ó (~Q -> ~P)

(ii)Q v  (P ^ ~Q) v (~P v ~Q)

June 2011

5

 

Q.  2

Prove that the following statement is logically equivalent

(p=> q) v r Ξ (p v r) => (q v r)

June 2007

Dec 2013

7

Q. 3

Explain the following terms

Converse, Inverse and Contrapositive

June 2013

2

Q.4

Construct Converse, inverse and contrapositive of the direct statement if

4x – 2 = 10 then x = 3

June 2009

5

Q.5

Write short note on Quantifiers

June 2011

2

 

 

 

 

 

 

 

 

 

 

 

 

NEGATION OF QUANTIFIERS, PROBLEMS ON QUANTIFIERS

Unit-03/Lecture-04

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 317-319}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

Discuss Normal Forms

June 2013

2

 

Q.  2

What is Predicate?

June 2011

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NORMAL FORMS

Unit-03/Lecture-05

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 326-328}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

Express the following formula into disjunctive normal form

~ (p v q) ó (p ^ q)

June 2013

2

 

Q.  2

Express the following formula into conjunctive normal form

~ (p v q) ó (p ^ q)

June 2013

June 2009

2

Q.  3

Obtain the principal disjunctive normal form of

(i) ~ P v Q

(II) (P ^ Q) v (~P ^ R) v (Q ^ R)

June 2011

7

Q. 4

Show that ~( p ^ q) => (~p v (~p v q)) ó (~p v q)

June 2005

7

Q.5

Obtain the conjunctive Normal Form of (~p -> r)^(q<->p)

June 2014

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FINITE STATE AUTOMATA

Unit-03/Lecture-06

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 331-336}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

Define finite state machines? Explain state table and state diagram of a finite state machine with the help of suitable example?

June 2013

7

 

Q.2

Construct a finite state acceptor that will accept the set of natural numbers x which are divisible by 3

June 2014

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FINITE AUTOMATA WITH OUTPUTS

Unit-03/Lecture-07

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 331-336}

MINIMIZATION OF FINITE AUTOMATA

Unit-03/Lecture-08

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 336-337}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

For the finite state machine below

(i) List all 0- equivalent states

(II) Find all equivalent states and obtain an equivalent finite state machine with the smallest no. of states

State

Input

         0                                1

Output

ð  A

F

B

0

B

D

C

0

           C

G

B

0

           D

E

A

1

           E

D

A

0

           F

A

G

1

           G

C

H

1

          H

A

H

1

Dec 2011

7

 

Q 2

Minimize the finite state machine given by

State

Input

         0                                1

Output

A

D

B

1

B

E

B

0

C

D

A

1

D

C

D

0

E

B

A

1

June 2011

7

 

 

 

 

 

 

 

 

PROBLEMS ON MINIMIZATION

UNIT- 03/ LECTURE -09

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 336-337}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

Show that the two finite state machines shown in following tables are equivalent

State

Input

         0                                1

Output

ð  A

B

C

0

B

F

D

0

           C

G

E

0

           D

H

B

0

           E

B

F

1

           F

D

H

0

           G

E

B

0

          H

B

C

1

Dec 2012

7

 

Q 2

(I) List all 0- equivalent states

(ii) Find all equivalent states and obtain an equivalent finite state machine with the smallest number of states

State

Input

         0                                1

Output

A

B

F

0

B

B

C

1

C

D

C

1

D

A

E

1

E

A

D

0

F

F

D

0

 

June 2009

7

 

 

 

 

 

 

 

 

FINITE STATE MACHINES AS LANGUAGE RECOGNIZERS

Unit-03/Lecture-10

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REFERENCES {DISCRETE STRUCTURES BY D.C. AGARWAL, 337-344}

S.NO

RGPV QUESTIONS

Year

Marks

Q.1

Show that the language L= { am : m= i2, i>=1} is not a finite state language

June 2009, June 2014

10,7

 

Q 2

Show that the language L= {ak bk : k>=1 } is not a finite state language

 

Nov 2007

7

Q. 3

Construct deterministic finite state machine that recognizes the set

(i) { 0i 1j | i>=1, j>=0}

(ii) Set of all binary strings ends with 00.

Dec 2008

10

 

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