Page 361 - AI Ver 1.0 Class 10
P. 361

iii.  Ayushi was learning about NLP. She wanted to know the term used for the whole textual data from all the documents
                       altogether. Help her in identifying the term used for it.                                        1
                      iv.  What is the full form of TF-IDF?                                                             1
                     v.  A corpus contains 12 documents. How many document vectors will be there for that corpus?       1

                       (a) 12                                         (b) 1
                       (c) 24                                         (d) 1/12.

                    vi.  Identify the type of chatbot with the information given below:
                        These bots work on pre-programmed instructions inside the application/machine and are generally easy to develop.
                       They are deployed in the customer care section of various companies. Their job is to answer some basic queries that
                       they are coded for and connect them to human executives once they are unable to handle the conversation.

                 5.  Answer any 5 out of the given 6 questions.                                      (1 × 5 = 5 marks)

                     i.  The output given by the AI machine is known as………………………. (Prediction/ Reality)                 1
                     ii.  ………………………. is used to record the result of comparison between the prediction and reality. It is not an evaluation
                       metric but a record which can help in evaluation.:                                               1
                    iii.  Raunak  was  learning the  conditions that  make up  the  confusion matrix.  He came across a  scenario  in which  the
                       machine that was supposed to predict an animal was always predicting not an animal. What is this condition called? 1
                       (a) False Positive                             (b) True Positive

                       (c) False Negative                             (d) True Negative
                    iv.  Which two evaluation methods are used to calculate F1 Score?                                   1

                       (a) Precision and Accuracy                     (b) Precision and Recall

                       (c) Accuracy and Recall                        (d) Precision, F1 score
                     v.  Which of the following statements is not true about overfitting models?                        1
                       (a)  This model learns the pattern and noise in the data to such extent that it harms the
                          performance of the model on the new dataset

                       (b) Training result is very good and the test result is poor

                       (c) It interprets noise as patterns in the data
                       (d) The training accuracy and test accuracy both are low

                      vi.  Priya was confused with the terms used in the evaluation stage. Suggest her the term used for the percentage of
                       correct predictions out of all the observations.                                                 1

                       (a) Accuracy                                   (b) Precision
                       (c) Recall                                     (d) F1 Score


                                         SECTION B: SUBJECTIVE TYPE QUESTIONS


                    Answer any 3 out of the given 5 questions on Employability Skills.                   (2 × 3 = 6 marks)

                    Answer each question in 20 – 30 words.
                     6.  In SMART goals, what does ‘A’ stand for? Explain.                                              2
                     7.  Sameera is always punctual at school. She has a regular schedule that she follows every day. She plans for study and
                       play time in advance. Enlist the four steps Sameera must have followed for effective time management.   2

                                                                               CBSE Sample Question Paper   359
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