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Tutor profile: Rajat D.

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Rajat D.
Software Developer & Tech Enthusiast
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Questions

Subject: Machine Learning

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Question:

What is Deep Learning?

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Rajat D.
Answer:

Deep Learning is a subset of Machine Learning which is used to create an artificial multi-layer neural network. It has self-learning capabilities based on previous instances, and it provides high accuracy. The neural network works the same as the human brain neurons work connecting with each other.

Subject: Data Science

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Question:

What are the differences between overfitting and underfitting?

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Rajat D.
Answer:

In statistics and machine learning, one of the most common tasks is to fit a model to a set of training data, so as to be able to make reliable predictions on general untrained data. In overfitting, a statistical model describes random error or noise instead of the underlying relationship. Overfitting occurs when a model is excessively complex, such as having too many parameters relative to the number of observations. A model that has been overfitted has poor predictive performance, as it overreacts to minor fluctuations in the training data. Underfitting occurs when a statistical model or machine learning algorithm cannot capture the underlying trend of the data. Underfitting would occur, for example, when fitting a linear model to non-linear data. Such a model too would have poor predictive performance.

Subject: Android Programming

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Question:

What is a Fragment?

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Rajat D.
Answer:

A fragment is a part or portion of an activity that can be created easily and has its own lifecycle. It is modular in a sense that you can move around or combine with other fragments in a single activity. Fragments are also reusable and help to reduce tons of load from android memory usage. As it prevents the user to open intents one after the another for performing a simple task within an app.

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