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1. From the lecture what can you recall about XCON? I. It was a rule-based system designed to assist physicians in the diagnosis of patients with bacterial infections II. It was a backward chaining rule-based system III. It was a rule-based expert system designed to help automatically configured computer systems IV. It was a forward chaining rule-based system

Options

A : II only

B : I and II

C : III and IV

D : IV only

2. A rue-based system makes inferences using either Forward Chaining or Backward Chaining. Forward chaining corresponds to ______ approach and backward chaining corresponds to ______ approach I. Goal-directed, Data-driven II. Eager, Lazy III. Lazy, Eager IV. Data-driven, Goal-directed

Options

A : I and II

B : II and III

C : II and IV

D : III and IV

3. A rue-based system has two types of memory components - long term memory and short term memory. The former corresponds to ________ and the latter corresponds to _______

Options

A : WWEs, Rules

B : Rules, WMEs

C : Alpha nodes, Beta nodes

D : Antecedent, Consequent

4. Which of the following is the most expensive phase in the working of a rule-based system?

Options

A : Matching WMEs with rules

B : Resolving conflict set to select a rule with its data

C : Execute the rule selected from the conflict set

D : Generating the Rete network of rules

5. The motivation behind employing Rete algorithm is

Options

A : To generate the Rete network of rules

B : to reduce the space complexity of long term memory

C : to select a rule with its data from the conflict set

D : to improve upon the process of matching WMEs with rules

6. Which of the following is/are true about conflict set? A. The conflict set contains a set of rules that are ready to fire along with their matching WMEs B. The conflict set contains the set of contradictory rules in a rule based system C. The conflict set is the output of the Match routine in Match-Resolve-Execute cycle D. A conflict set is generated from scratch in every Match-Resolve-Execute cycle

Options

A : A and B

B : B and C

C : A and C

D : B and D

7. Consider the following rule in an OPS5 like language: (p some-operation (array ^index <i> ^value<n>)) (aray ^index <j> > <i> ^value <m> < <n>) → (modify 1 ^value <m>)) modify 2 ^value <m>) )

Options

A : It sorts an array in descending order

B : It swaps every two subsequent elements in an array

C : It swaps two elements that are in an incorrect order in an array

D : It traverses the array once, swapping every two elements that are in an incorrect order

8. Which of the following is/are true regarding alpha and beta nodes in the Rete Net? A. Alpha nodes are discriminative in nature while beta nodes are assimilative in nature B. An alpha node can have a beta node as its parent C. An alpha node can have only one parent D. A beta node can have only one parent

Options

A : Only B

B : A and B

C : A, C and D

D : A and C

10. Assuming recency as the conflict resolution strategy, what conclusion would be made when a rule is selected and executed from the conflict set in the answer to the previous question?

Options

A : remove(thread_Alive t1)

B : remove(thread_Alive t2)

C : remove(thread_Alive t3)

D : None of the above

11. Consider the following rules in a rule based system:

Options

A : I, II and III

B : I, II, VI

C : II, III, IV and V

D : IV, V and VI

12. If specificity is employed as the conflict-resolution strategy in the answer to above question, what conclusion would be made when one rule is selected and executed? Note that the WMEx are stored in the increasing order of their timestamp values in the memory as indicated

Options

A : make (process ^name t1 ^isAlive yes)

B : make (process ^name t1 ^isAlive no)

C : make (process ^name t2 ^isAlive yes)

D : make (process ^name t2 ^isAlive no)

13. If recency is employed as the conflict-resolution strategy in the answer to the previous question, what conclusion would be made when one rule is selected and executed? Note the WMEs are stored in increasing order of their timestamp values in the memory as indicated

Options

A : make (process ^name t1 ^isAlive yes)

B : make (process ^name t1 ^isAlive no)

C : make (process ^name t2 ^isAlive yes)

D : make (process ^name t2 ^isAlive no)

14. If the strategy used by inference engine is Recency then enter the element from the conflict set that will be selected for the execution. The rule data must be entered as a comma separated rule-name followed by the timestamps of matching WMEs (in the increasing order of the timestamps). For example: If <LC1,1,2> is the selected rule-data then your answer should be: LC1,1,2

Options

A : (type: String) LC1,2,8 (type: String) LC1, 2, 8

B : (type: String) LC1,3,8 (type: String) LC1, 3, 8

C : (type: String) LC1,2,7 (type: String) LC1, 2, 7

D : (type: String) LC1,4,8 (type: String) LC1, 4, 8

15. If the strategy used by inference engine is Specificity then enter the element from the conflict set that will be selected for the execution. The rule data must be entered as a comma separated rule-name followed by the timestamps of matching WMEs (in the increasing order of the timestamps). For example: If <LC1,1,2> is the selected rule-data then your answer should be: LC1,1,2

Options

A : (type: String) LC2,3,5,7 (type: String) LC2, 3, 5, 7

B : (type: String) LC2,1,3,5 (type: String) LC2, 1, 3, 5

C : (type: String) LC2,1,5,7 (type: String) LC2, 1, 5, 7

D : (type: String) LC2,1,3,7 (type: String) LC2, 1, 3, 7

16. Which of the following rule-data combination will NOT be in the Conflict Set? A. <N,1> B. <LC2,3,5,7> C. <LC2,3,5> D. <LC1,2,4,8>

Options

A : A and B

B : B and C

C : A and D

D : C and D

17. For the Rete network shown below, which of the above rules correspond to the beta node marked X?

Options

A : I only

B : I and II only

C : II only

D : III only

18. Which of the following rules along with WMEs corresponding to the beta node Y are part of the Conflict Set for the given data?

Options

A : <N,1>

B : <LC2,3,5,7>

C : <LC2,3,5>

D : <LC1,2,8>

19. Consider the same OPS5 rule given in above question and working memory contains the following data elements, ordered by increasing timestamps: 1. (thread ^name t1 ^hasTimeout yes) 2. (thread ^name t2 ^hasTimeout no) 3. (thread ^name t3 ^hasTimeout no) The pair(s) present in the conflict set after the match phase of the inference engine is/are I. <thread-mangement-rule, 1> II. <thread-mangement-rule, 2> III. <thread-mangement-rule, 3>

Options

A : I and II

B : II and III

C : I, II and III

D : None of the above

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