## NPTEL Fundamentals of Artificial intelligence Week 7 Assignment Answers 2024

1. Within a logical-agent approach, agents almost never have access to the whole truth about their environment. Agents must therefore act under uncertainty. Identify the probable reason / reasons of uncertainty.

A. Incompleteness in the agent’s understanding of the properties of the environment.

B. Options, choices, and preferences of the properties of the environment.

C. Use of formal language for representing and reasoning about the environment.

D. Incorrectness in the agent’s understanding of the properties of the environment.

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2. Belief networks is a powerful tool for representing and reasoning with uncertain knowledge. It is a graph in which the following holds:

A. A set of random variables makes up the nodes of the network.

B. Some nodes have a conditional probability table that quantifies the effects that the parent nodes have on the node.

C. It is a directed acyclic graph.

D. A set of directed links or arrows connects pairs of nodes.

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4. ** ________________** provides ways and means of weighing up the desirability of goals and the likelihood of achieving them.

A. Decision Theory

B. Utility Theory

C. Probability Theory

D. Bayesian Networks

Answer :-

5. Find the probability that a message contains the word “free”, given that it is spam.

A. 0.266

B. 0.752

C. 0.737

D. 0.978

Answer :-

6. What is the probability that a message is spam, given that it contains the word “free”?

A. 0.266

B. 0.752

C. 0.737

D. 0.978

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7. Find the probability that a message is spam, given that it contains the word “text” (or “txt”).

A. 0.266

B. 0.752

C. 0.737

D. 0.978

Answer :-

8. Find the expected utility of Review; EU(Review).

A. 1500

B. 800

C. 1000

D. 750

Answer :-

9. Find the expected utility of Sleep; EU(Sleep).

A. 1500

B. 800

C. 1000

D. 750

Answer :-

10. What is the maximum expected utility, Maximum EU({}) ?

A. 1500

B. 800

C. 1000

D. 750

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