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(v) The K-Nearest Neighbours (KNN) algorithm assigns a class to new data point by considering: 1
a) Distance from the data point to a predefined decision boundary
b) Majority vote of its K nearest neighbours in the training data
c) Similarity of the data point to a cluster centroid
d) Probability of each class given the data point’s features.
(vi) The correlation between two variables is given as r = 0.0. What does this mean? 1
a) The best straight line through the data is horizontal
b) There is a perfect positive relationship between the two variables
c) There is a perfect negative relationship between the two variables
d) All of the points must fall exactly on the horizontal line
4. Answer any 5 out of the given 6 questions. (5x1=5)
(i) What is clustering? 1
a) Grouping labelled dataset
b) Dividing data into different clusters
c) Finding linear association between variables
d) Predicting future behaviours of a dependent variable
(ii) Gaurav is studying Regression. He is unable to understand what the ‘Line of best fit’ means. Mention 2 features
about the ‘Line of Best fit’ for Gaurav. 1
(iii) What does a classification model in AI ultimately want to achieve? 1
a) to identify patterns and associations in data
b) to predict continuous numerical values
c) to categorize input data into predefined classes or labels
d) to optimize decision-making processes
(iv) Which of the following is NOT a common task in NLP? 1
a) Machine translation b) Text summarisation
c) Speech recognition d) Image recognition
(v) ………………………. chatbots cannot answer questions outside of the established rules. 1
a) Virtual b) Rule based
c) AI Based d) All of these
(vi) MIT grad student Smita was working with facial analysis software when she noticed a problem: the software
didn't detect her face—because the people who coded the algorithm hadn't taught it to identify a broad range
of skin tones and facial structures. This is an example of: 1
a) Computer vision b) AI bias
c) NLP d) Data mining
5. Answer any 5 out of the given 6 questions. (5x1=5)
(i) Data points that stand out from the rest of the dataset are known as ………………………. . 1
(ii) Name the 4 types of Correlation that you have studied. 1
Model Test Paper-1 453

