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Coforge Data Scientist Interview Questions and Answers

Updated 5 Feb 2024

Q1. coding question of finding index of 2 nos. having total equal to target in a list, without using nested for loop? l= [2,15,5,7] t= 9 output》》[0,3]

Ans.

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.

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Q2. 1) How decision tree works 2) what are the parameters used in OpenCV?

Ans.

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

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Q3. what is random forest, knn?

Ans.

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

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Q4. find unique keys in 2 dictionaries

Ans.

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

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Q5. aws ec2 model deployment procedure

Ans.

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

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Q6. overloading concept of oop

Ans.

Overloading is the ability to define multiple methods with the same name but different parameters.

  • Overloading allows for more flexibility in method naming and improves code readability.

  • Examples include defining multiple constructors for a class with different parameter lists or defining a method that can accept different data types as input.

  • Overloading is resolved at compile-time based on the number and types of arguments passed to the method.

  • Overloading is different from ove...read more

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