National Payments Corporation of India Interview Questions, Process, and Tips

Q1. Intro, project, hr questions, constructor, destructor, c++, acid properties
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Psychometric test has to be given

Q1. Technical payments questions
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Q1. Negotiation plus why NPCI
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Q1. Tell me about your self
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Q1. Find Duplicates in an array
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To find duplicates in an array, we can use a hash table or sort the array and compare adjacent elements.
• Create a hash table and iterate through the array, adding each element to the hash table. If an element already exists in the hash table, it is a duplicate.

• Sort the array and compare adjacent elements. If two adjacent elements are the same, it is a duplicate.

• If the array is large, sorting may be slower than using a h
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Q2. What is KNN algorithm?
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KNN algorithm is a type of supervised learning algorithm used for classification and regression analysis.
• KNN stands for K-Nearest Neighbors.

• It is a non-parametric algorithm that works by finding the K closest data points in the training set to the new data point and classifying it based on the majority class of those K points.

• It can be used for both classification and regression problems.

• KNN is sensitive to the choice ...read more
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Q3. What is Random Forest algorithm?
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Random Forest is an ensemble learning algorithm that builds multiple decision trees and combines their outputs.
• Random Forest is a supervised learning algorithm.

• It can be used for both classification and regression tasks.

• It creates multiple decision trees and combines their outputs to make a final prediction.

• Random Forest reduces overfitting and improves accuracy compared to a single decision tree.

• It randomly selects a ...read more
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