Tredence Analytics Manager Interview Questions and Answers

Lambda functions are anonymous functions in Python that can have any number of arguments but only one expression.

• Lambda functions are defined using the lambda keyword.

• They are commonly used with functions like map(), filter(), and reduce().

• Example: double = lambda x: x * 2

Precision, recall, and F1 score are metrics used to evaluate the performance of classification models.

• Precision is the ratio of correctly predicted positive observations to the total predicted positive observations.

• Recall is the ratio of correctly predicted positive observations to the all observations in actual class.

• F1 score is the harmonic mean of precision and recall, providing a balance between the two metrics.

• Pre...read more

Elbow curve helps in determining the optimal number of clusters in a dataset.

• Elbow curve is a plot of the number of clusters against the within-cluster sum of squares (WCSS).

• The point where the rate of decrease of WCSS sharply changes is considered as the optimal number of clusters.

• It helps in finding the balance between having too few or too many clusters.

• For example, if the elbow point is at 3 clusters, it suggests t...read more

Support, confidence, and lift are key metrics in market basket analysis to identify relationships between items in a transaction.

• Support measures how frequently an itemset appears in the dataset.

• Confidence measures the likelihood that an item B is purchased when item A is purchased.

• Lift measures how much more likely item B is purchased when item A is purchased compared to when item B is purchased independently of item ...read more