Deck 3: Machine Learning and Data Analysis

Question 1

Which of the following can be used to impute data sets based only on information in the training set?

A)postprocess
B)preProcess
C)process
D)All of the Mentioned

Answer 1

preProcess

Question 2

Which of the following model model include a backwards elimination feature selection routine?

A)MCV
B)MARS
C)MCRS
D)All of the Mentioned

Answer 2

MARS

Question 3

Which of the following is a categorical outcome?

A)RMSE
B)RSquared
C)Accuracy
D)All of the Mentioned

Answer 3

Accuracy

Question 4

Which of the following function provides unsupervised prediction ?

A)cl_forecast
B)cl_nowcast
C)cl_precast
D)None of the Mentioned

Question 5

What is true about Machine Learning?

A)Machine Learning (ML) is that field of computer science
B)ML is a type of artificial intelligence that extract patterns out of raw data by using an algorithm or method.
C)The main focus of ML is to allow computer systems learn from experience without being explicitly programmed or human intervention.
D)All of the above

Question 6

ML is a field of AI consisting of learning algorithms that?

A)Improve their performance
B)At executing some task
C)Over time with experience
D)All of the above

Question 7

p ? 0q is not a?

A)hack clause
B)horn clause
C)structural clause
D)system clause

Question 8

The action _______ of a robot arm specify to Place block A on block B.

A)STACK(A,B)
B)LIST(A,B)
C)QUEUE(A,B)
D)ARRAY(A,B)

Question 9

A__________ begins by hypothesizing a sentence (the symbol S) and successively predicting lower level constituents until individual preterminal symbols are written.

A)bottow-up parser
B)top parser
C)top-down parser
D)bottom parser

Question 10

A model of language consists of the categories which does not include ________.

A)System Unit
B)structural units.
C)data units
D)empirical units

Question 11

Different learning methods does not include?

A)Introduction
B)Analogy
C)Deduction
D)Memorization

Question 12

The model will be trained with data in one single batch is known as ?

A)Batch learning
B)Offline learning
C)Both A and B
D)None of the above

Question 13

Which of the following are ML methods?

A)based on human supervision
B)supervised Learning
C)semi-reinforcement Learning
D)All of the above

Question 14

In Model based learning methods, an iterative process takes place on the ML models that are built based on various model parameters, called ?

A)mini-batches
B)optimizedparameters
C)hyperparameters
D)superparameters

Question 15

Which of the following is a widely used and effective machine learning algorithm based on the idea of bagging?

A)Decision Tree
B)Regression
C)Classification
D)Random Forest

Question 16

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

A)The value of the gradient at extrema of a function is always zero
B)Depends on the type of problem
C)Both A and B
D)None of the above

Question 17

Which of the following is a disadvantage of decision trees?

A)Factor analysis
B)Decision trees are robust to outliers
C)Decision trees are prone to be overfit
D)None of the above

Question 18

How do you handle missing or corrupted data in a dataset?

A)Drop missing rows or columns
B)Replace missing values with mean/median/mode
C)Assign a unique category to missing values
D)All of the above

Question 19

When performing regression or classification, which of the following is the correct way to preprocess the data?

A)Normalize the data -> PCA -> training
B)PCA -> normalize PCA output -> training
C)Normalize the data -> PCA -> normalize PCA output -> training
D)None of the above

Question 20

Which of the following statements about regularization is not correct?

A)Using too large a value of lambda can cause your hypothesis to underfit the data.
B)Using too large a value of lambda can cause your hypothesis to overfit the data
C)Using a very large value of lambda cannot hurt the performance of your hypothesis.
D)None of the above

Question 21

Which of the following techniques can not be used for normalization in text mining?

A)Stemming
B)Lemmatization
C)Stop Word Removal
D)None of the above

Question 22

In which of the following cases will K-means clustering fail to give good results?
1) Data points with outliers
2) Data points with different densities
3) Data points with nonconvex shapes

A)1 and 2
B)2 and 3
C)1 and 3
D)All of the above

Question 23

Which of the following is a reasonable way to select the number of principal components "k"?

A)Choose k to be the smallest value so that at least 99% of the varinace is retained.
B)Choose k to be 99% of m (k = 0.99*m, rounded to the nearest integer).
C)Choose k to be the largest value so that 99% of the variance is retained.
D)Use the elbow method.

Question 24

What is a sentence parser typically used for?

A)It is used to parse sentences to check if they are utf-8 compliant.
B)It is used to parse sentences to derive their most likely syntax tree structures.
C)It is used to parse sentences to assign POS tags to all tokens.
D)It is used to check if sentences can be parsed into meaningful tokens.

Question 25

Data Analysis is a process of?

A)inspecting data
B)cleaning data
C)transforming data
D)All of the above