Infosys Certified Advanced Machine Learning Professional
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Join Premium10 Infosys Certified Advanced Machine Learning Professional practice questions with answers
Real Lex exam-pattern multiple-choice questions for the Infosys Certified Advanced Machine Learning Professional certification. Each question includes the correct answer. The full question bank is available to Premium members.
- Question 1
Assume, you want to cluster 7 observations into 3 clusters using K-Means clustering algorithm. After first iteration clusters, C1, C2, C3 has following observations: C1: {(2,2), (4,4), (6,6)} C2: {(0,4), (4,0)} C3: {(5,5), (9,9)} What will be the cluster centroids if you want to proceed for second iteration?
- ✓
C1: (6,6), C2: (4,4), C3: (9,9)
Correct - B
C1: (4,4), C2: (2,2), C3: (7,7)
- C
C1: (2,2), C2: (0,0), C3: (5,5)
- D
None of the options
- ✓
- Question 2
In order to perform binary classification, the preferred value of k is:
- ✓
Even
Correct - B
Odd
- C
Either of them
- D
None of them
- ✓
- Question 3
Which of the following is/are true about Principal Component Analysis?
- ✓
PCA is an unsupervised method
Correct - B
It searches for the directions that data have the largest variance
- C
Maximum number of principal components <= number of features
- D
All principal components are orthogonal to each other
- ✓
- Question 4
In time series, cyclic variations can be measured by:
- ✓
Removing the trend from the series
Correct - B
Removing the seasonal variation from the series
- C
Removing the influences of the trend, seasonal and irregular variations
- D
None of these
- ✓
- Question 5
If the slope of the regression equation y = b0+b1x is positive, then:
- ✓
as x increases y decreases
Correct - B
as x increases so does y
- C
Either a or b
- D
as x decreases y increases
- ✓
- Question 6
Which of the following statements is/are true about Decision Trees: a. Less data cleaning is required to build a decision tree. b. A decision tree tends to overfit the data. c. Not an exact fit for continuous data.
- ✓
Only a and c
Correct - B
Only b and c
- C
Only a
- D
a, b, c
- ✓
- Question 7
The most widely used metrics and tools to assess a classification model are:
- ✓
Confusion matrix
Correct - B
Cost-sensitive accuracy
- C
Area under the ROC curve
- D
All of the above
- ✓
- Question 8
Suppose, you build a model using sklearn.linear_model.LinearRegression and then evaluate it using the score() function. What does the score() method return?
- ✓
R2 value
Correct - B
Mean squared error
- C
Root Mean squared error
- D
F1 score
- ✓
- Question 9
What happens k-fold validation?
- ✓
Training data is divided into k equal sized subsets. Then, 1 subset is randomly selected and kept aside for validation, while the rest are used for training.
Correct - B
k random samples are picked and set aside to form the validation set, while the rest of the samples are used for training.
- C
k random samples are picked and used for training, while the rest are used for validation.
- D
k different models are built using the same training data, but with different hyperparameter settings and which are then validated against the test data. The best model is then chosen.
- ✓
- Question 10
Which of the following statements are true when you apply PCA to get new features from the available features present in the dataset?
- ✓
The new derived features will still have interpretability
Correct - B
The new derived features will lose interpretability
- C
Th new derived features must carry all information present in data
- D
The new derived features may not carry all information present in data
- ✓
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