TCS Data Scientist Interview Questions, Process, and Tips

Q1. About the python and sql
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Q1. F1 score, auc, recall, precision
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General qa like cat paper and 2 coding questions

Q1. What are Logist regression and tell me about your projects
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Logistic regression is a statistical model used to predict the probability of a binary outcome based on one or more predictor variables.
• Logistic regression is used when the dependent variable is binary (e.g., 0/1, yes/no, true/false).

• It estimates the probability that a given observation belongs to a particular category.

• It uses the logistic function to model the relationship between the dependent variable and independen...read more
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Q2. Go through your general project, steps, algo used
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Q1. Explain difference between Faster-RCNN and Yolo v3.
Ans. 
Faster-RCNN and Yolo v3 are both object detection algorithms, but differ in their approach and performance.
• Faster-RCNN uses a two-stage approach, first generating region proposals and then classifying them.

• Yolo v3 uses a single-stage approach, directly predicting bounding boxes and class probabilities.

• Faster-RCNN is generally more accurate but slower, while Yolo v3 is faster but less accurate.

• Faster-RCNN is better suit...read more
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Q2. How RNN handles exploding/vanishing Gradient?
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RNN uses techniques like gradient clipping, weight initialization, and LSTM/GRU cells to handle exploding/vanishing gradients.
• Gradient clipping limits the magnitude of gradients during backpropagation.

• Weight initialization techniques like Xavier initialization help in preventing vanishing gradients.

• LSTM/GRU cells have gating mechanisms that allow the network to selectively remember or forget information.

• Batch normaliza...read more
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Python, basics OOP, ML, MLOps

Q1. What is TSA? Explain the project as well.
Ans. 
TSA stands for Transportation Security Administration. It is a government agency responsible for security at airports and other transportation hubs.
• TSA was created in response to the September 11, 2001 terrorist attacks in the United States.

• Its main goal is to ensure the security of passengers and transportation infrastructure.

• TSA agents screen passengers and luggage for prohibited items before they board flights.

• The a...read more
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Q2. What is Polymorphism?
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Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to represent multiple data types.

• Examples include method overloading and method overriding in object-oriented programming.
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Q1. NLP techniques, word stop,
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Q2. K-nearset neighout algorithm, gaussian mixtture model
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