Pre-quiz-Intro-to-ML

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This quiz is based on pre-requisites for the first topic of the machine learning module. You should be able to finish this quiz in 10-15 minutes.

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To find the minimum or the maximum of a function, we set the gradient to zero because:

1 point

The value of the gradient at extrema of a function is always zero

Depends on the type of problem

Both A and B

None of these

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The mode of 12, 17, 16, 14, 13, 16, 11, 14 is

1 point

14 and 16

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Decision trees can be used for classification tasks.

1 point

True

False

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Over-fitting causes:

1 point

good generalization behaviour on new data.

poor generalization behaviour on new data.

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Which of the following is/are true about Random Forest and Gradient Boosting ensemble methods?

2 points

Both methods can be used for classification task

Random Forest is used for classification whereas Gradient Boosting is used for regression task

Random Forest is used for regression whereas Gradient Boosting is used for Classification task

Both methods can be used for regression task

In gradient boosting it is important to use the learning rate to get optimum output. Which of the following is true abut choosing the learning rate?

1 point

Learning rate should be as high as possible

Learning Rate should be as low as possible

Learning Rate should be low but it should not be very low

Learning rate should be high but it should not be very high

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What is machine learning?

1 point

The autonomous acquisition of knowledge through the use of computer programs.

The autonomous acquisition of knowledge through the use of manual programs.

The selective acquisition of knowledge through the use of computer programs.

The selective acquisition of knowledge through the use of manual programs.

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In a week the prices of a bag of rice were 350,280,340,290,320, 310,300. The range is

1 point

Clear selection

The sum of the percent frequencies for all classes will always be equal to

1 point

one

the number of classes

the number of items in the study

100

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