# Artificial Intelligence Questions & Answers – Propositional Logic

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This set of Artificial Intelligence Multiple Choice Questions & Answers (MCQs) focuses on “Propositional Logic”.

1. Which is created by using single propositional symbol?
a) Complex sentences
b) Atomic sentences
c) Composition sentences
d) None of the mentioned

Explanation: Atomic sentences are indivisible syntactic elements consisting of single propositional symbol.

2. Which is used to construct the complex sentences?
a) Symbols
b) Connectives
c) Logical connectives
d) All of the mentioned

Explanation: None.

3. How many proposition symbols are there in artificial intelligence?
a) 1
b) 2
c) 3
d) 4

Explanation: The two proposition symbols are true and false.

4. How many logical connectives are there in artificial intelligence?
a) 2
b) 3
c) 4
d) 5

Explanation: The five logical symbols are negation, conjunction, disjunction, implication and biconditional.

5. Which is used to compute the truth of any sentence?
a) Semantics of propositional logic
b) Alpha-beta pruning
c) First-order logic
d) Both Semantics of propositional logic & Alpha-beta pruning

Explanation: Because the meaning of the sentences is really needed to compute the truth.

6. Which are needed to compute the logical inference algorithm?
a) Logical equivalence
b) Validity
c) Satisfiability
d) All of the mentioned

Explanation: Logical inference algorithm can be solved be using logical equivalence, Validity and satisfiability.

7. From which rule does the modus ponens are derived?
a) Inference rule
b) Module rule
c) Both Inference & Module rule
d) None of the mentioned

Explanation: Inference rule contains the standard pattern that leads to desired goal. The best form of inference rule is modus ponens.

8. Which is also called single inference rule?
a) Reference
b) Resolution
c) Reform
d) None of the mentioned

Explanation: Because resolution yields a complete inference rule when coupled with any search algorithm.

9. Which form is called as a conjunction of disjunction of literals?
a) Conjunctive normal form
b) Disjunctive normal form
c) Normal form
d) All of the mentioned

Explanation: None.

10. What can be viewed as a single lateral of disjunction?
a) Multiple clause
b) Combine clause
c) Unit clause
d) None of the mentioned