Coforge Data Scientist Interview Questions and Answers

Finding index of 2 numbers having total equal to target in a list without nested for loop.

• Use dictionary to store the difference between target and each element of list.

• Iterate through list and check if element is in dictionary.

• Return the indices of the two elements that add up to target.

Decision tree is a tree-like model used for classification and regression. OpenCV parameters include image processing and feature detection.

• Decision tree is a supervised learning algorithm that recursively splits the data into subsets based on the most significant attribute.

• It is used for both classification and regression tasks.

• OpenCV parameters include image processing techniques like smoothing, thresholding, and morphological operations.

• Feature detection parameters include...read more

Random forest and KNN are machine learning algorithms used for classification and regression tasks.

• Random forest is an ensemble learning method that constructs multiple decision trees and combines their outputs to make a final prediction.

• KNN (k-nearest neighbors) is a non-parametric algorithm that classifies new data points based on the majority class of their k-nearest neighbors in the training set.

• Random forest is useful for handling high-dimensional data and avoiding overf...read more

To find unique keys in 2 dictionaries.

• Create a set of keys for each dictionary

• Use set operations to find the unique keys

• Return the unique keys

AWS EC2 model deployment involves creating an instance, installing necessary software, and deploying the model.

• Create an EC2 instance with the desired specifications

• Install necessary software and dependencies on the instance

• Upload the model and any required data to the instance

• Deploy the model using a web server or API

• Monitor the instance and model performance for optimization