Thursday, May 14, 2020

Machine Learning Exam Interview Questions TRUE or FALSE 06

Machine learning quiz questions TRUE or FALSE with answers, important machine learning interview questions for data science, Top 3 machine learning question set

Machine Learning TRUE / FALSE Questions - SET 06

1. The back-propagation algorithm, when run until a minimum is achieved, always finds the same solution (i.e., weights) no matter what the initial set of weights are.

(a) TRUE                                                   (b) FALSE

View Answer

Answer: FALSE
It will iterate until a local minimum in the squared error is reached.

Back-propagation algorithm

The algorithm is used to train a neural network through a method called chain rule. In simple terms, after each forward pass through a network, back-propagation performs a backward pass while adjusting the model’s parameters (weights and biases).

2. Since classification is a special case of regression, logistic regression is a special case of linear regression.

(a) TRUE                                                   (b) FALSE

View Answer

Answer: TRUE
Logistic regression is a special case of linear regression when the outcome variable is categorical, and the log of odds is the dependent variable. It predicts the probability of occurrence of an event by fitting data to a logit function. Thus, the logit function acts as a link between logistic regression and linear regression.

3. K-Means will always give the same results regardless of the initialization of the centroids.

(a) TRUE                                                   (b) FALSE

View Answer

Answer: FALSE

K-means is sensitive to different initializations, which is why you should run it multiple times from different random initializations.

One way to determine the number of clusters is the elbow method.


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