Expert system interface

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Quick Questions

Shade in the A or B circle for each question.

1. What is the interface of an expert system?

A The part the user sees and uses to enter answers and read the conclusion

B The part that stores all the expert's facts and rules

2. Which of these does the interface do?

A Searches the rule base for a matching rule

B Displays questions to the user

3. How does a user give the expert system information about their problem?

A By entering answers through the interface

B By editing the rule base directly

4. Where does the user see the final result of an expert system?

A The conclusion is displayed on the interface

B The conclusion stays hidden inside the inference engine

5. Why should an expert system interface be user-friendly?

A So only trained experts can use it

B So non-experts can use it without special training

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1Interface shows: "Does the patient have a fever? (Y/N)"		AOUTPUT "Diagnosis: Flu"
2INPUT answer		BOUTPUT "Is the engine making a noise? (Y/N)"
3The interface displays the conclusion to the user once the system has finished reasoning		CThis describes the knowledge base and rule base, not the interface. The interface only handles input and output between the user and the system.
4A user-friendly interface lets non-experts choose from simple options instead of using technical terms		DThe interface should be user-friendly for non-experts. Needing expert training defeats the purpose of an expert system.
5The interface stores the rules and facts that experts have collected		EThe interface displays a question to the user
6The interface is designed so that only a trained expert can use it		FThe interface lets the user enter an answer or fact

Definitions

user interface

Fill in the Blanks

Complete each line of code by filling in the missing parts.

______ "Is the engine making a noise?"

OUTPUT "Is the engine making a noise?" _____ answer

______ "Conclusion: Check the battery"

INPUT answer IF ______ = "YES" THEN

OUTPUT "Enter symptom (YES/NO):" _____ symptom

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A OUTPUT "Is the car starting?"

B INPUT answer

C IF answer = "no" THEN

D INPUT "Check the battery"

E ENDIF

Question 2

A OUTPUT "Do you have a fever?"

B INPUT fever

C IF fever = "yes" THEN

D OUTPUT fever

E ENDIF

Question 3

A OUTPUT "Is the rash itchy?

B INPUT reply

C IF reply = "yes" THEN

D OUTPUT "Try a cream"

E ENDIF

Question 4

A INPUT "Welcome to Pet Help"

B OUTPUT "Is your pet a dog?"

C INPUT answer

D IF answer = "yes" THEN

E OUTPUT "Walk it daily"

F ENDIF

Question 5

A OUTPUT "Is the light on?"

B INPUT answer

C IF answer = "no"

D OUTPUT "Check the bulb"

E ENDIF

Answer Key

Expert system interface

Section A: Quick Questions

A — The part the user sees and uses to enter answers and read the conclusion

B — Displays questions to the user

A — By entering answers through the interface

A — The conclusion is displayed on the interface

B — So non-experts can use it without special training

Section B: Match the Pairs

Interface shows: "Does the patient have a fever? (Y/N)" → The interface displays a question to the user

INPUT answer → The interface lets the user enter an answer or fact

The interface displays the conclusion to the user once the system has finished reasoning → OUTPUT "Diagnosis: Flu"

A user-friendly interface lets non-experts choose from simple options instead of using technical terms → OUTPUT "Is the engine making a noise? (Y/N)"

The interface stores the rules and facts that experts have collected → This describes the knowledge base and rule base, not the interface. The interface only handles input and output between the user and the system.

The interface is designed so that only a trained expert can use it → The interface should be user-friendly for non-experts. Needing expert training defeats the purpose of an expert system.

Section C: Definitions

user interface — The part of an expert system the user sees. It shows questions, lets the user enter answers and facts, and displays the conclusion in a simple way for non-experts.

Section D: Fill in the Blanks

OUTPUT "Is the engine making a noise?"

OUTPUT "Is the engine making a noise?"
INPUT answer

OUTPUT "Conclusion: Check the battery"

INPUT answer
IF answer = "YES" THEN

OUTPUT "Enter symptom (YES/NO):"
INPUT symptom

Section E: Spot the Error

D — The conclusion must be shown to the user, so it needs OUTPUT. INPUT would wait for the user to type something instead. It should be OUTPUT "Check the battery".

D — This displays the user's own answer instead of the conclusion. The interface should display the conclusion, OUTPUT "See a doctor".

A — The question text is missing its closing quote, so the interface cannot display it properly. It should be OUTPUT "Is the rash itchy?".

A — A welcome message is shown to the user, so it needs OUTPUT. INPUT is for the user entering answers. It should be OUTPUT "Welcome to Pet Help".

C — The IF line is missing THEN. The expert system can only act on the user's answer if the rule is written correctly: IF answer = "no" THEN.