This document contains exam instructions for an Artificial Intelligence and Expert Systems course. It provides 6 questions to choose from, with each question having multiple parts. The exam is 30 minutes long and worth a total of 10 marks. Students must answer any 2 of the 6 questions provided. The questions cover topics like propositional logic, satisfiability, semantic nets, and converting sentences to predicate logic.

1. Stamford University Bangladesh
Department of Computer Science and Engineering
Course: Artificial Intelligence and Expert System
Time: 30Minutes Total Marks: 10
Answer any two of the following questions:
1. a) What is propositional logic? 1
b) What do you understand by Satisfiable, Contradictory and Valid statement? 1.5
c) Determine whether the following statement S is Satisfiable, Contradictory or Valid. 2.5
S :(P V Q) & (P V ~Q) V P
2. a) Determine whether the following statement is true or false. 2
(P V~ Q) & R → S V (~ R & Q), if P is true, Q is true, R is false, S is true.
b) Convert the following sentences into predicate logic:
i)All employees earning 30,000 or more per year pay taxes. 1.5
ii) No employee is sick today. 1.5
3. a) What is semantic net? Give example. 2.5
b) Describe the problems with semantic net. 2.5
Stamford University Bangladesh
Department of Computer Science and Engineering
Course: Artificial Intelligence and Expert System
Time: 30Minutes Total Marks: 10
Answer any two of the following questions:
4. a) What is propositional logic? 1
b) What do you understand by Satisfiable, Contradictory and Valid statement? 1.5
c) Determine whether the following statement S is Satisfiable, Contradictory or Valid. 2.5
S :(P V Q) & (P V ~Q) V P
5. a) Determine whether the following statement is true or false. 2
(P V~ Q) & R → S V (~ R & Q), if P is true, Q is true, R is false, S is true.
b) Convert the following sentences into predicate logic:

2. i) All employees earning 30,000 or more per year pay taxes. 1.5
ii) No employee is sick today. 1.5
6. a) What is semantic net? Give example. 2.5
b) Describe the problems with semantic net. 2.5