Interview Questions Answers in Python, Mathematics, Data Science, Core Java, Spring Framework, Java Related AllOther, VB.NET

What is Regression?

Answer

Regression is a supervised machine learning algorithm technique that helps predict the dependent variable (y) based on the independent variable (x) by determining the correlation between variables. Prediction, time series modeling, forecasting, and figuring out the causal-effect relationship between variables are its primary uses.

Regression and all machine learning methods are implemented in Python using the Scikit module.

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Question { 2580 }

How is memory managed in python?

Answer

All of the objects in Python are stored in a private heap region. This heap's sharing, caching, segmentation, and allocation are all controlled by the Python memory manager. Only the Python interpreter has access to the heap; the user does not.

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Question { 2580 }

How is memory managed in python?

Answer

Python memory management consists of a private heap that holds all data structures and objects. The interpreter controls the heap, and the programmer has no access to it. All memory allocation is handled by the Python memory management. Additionally, a built-in trash collector recycles and frees up heap space memory.

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Question { 126 }

What are decorators in Python?

Answer

Decorators are used to alter the appearance of a function while retaining its structure. They are often defined before the function that they improve.

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Question { 636 }

What is namespace in Python?

Answer

A namespace is a naming system used to make sure that names are unique to avoid naming conflicts.

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Question { 630 }

What is list comprehension? Give an example.

Answer

A syntax component called list comprehension makes it easier to create a list using an existing iterable.

For instance:

[i for i in range(1, 10)] = my_list

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Question { 669 }

What are packages in java?

Answer

Packages in Java can be defined as the grouping of related types of classes, interfaces, etc providing access to protection and namespace management.

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Question { 249 }

How to handle exceptions in spring mvc framework?

Answer

There are two methods for managing exceptions in Spring MVC:

Exception handler method: The @ExceptionHandler annotation type is used to annotate a method to handle exceptions in this type of exception handling.

XML Configuration: The exception can be mapped by the user using the Simple Mapping Exception Resolver bean in the Spring application file.

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Question { 553 }

Which python library is built on top of matplotlib and pandas to ease data plotting?

Answer

To make data visualization easier, the Python package Seaborn was developed on top of matplotlib and pandas. It is a Python data visualization toolkit that offers a high-level interface for creating meaningful statistical graphs.

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Question { 571 }

What is a pass in python?

Answer

In other words, pass indicates that no operation is being performed; in other words, it is a placeholder in the compound statement where nothing needs to be typed and a blank should remain

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Question { 560 }

What is the difference between = and == in python?

Answer

While // denotes floor division (result is an integer), / denotes precise division (result is a floating point value). For instance:

5//2 = 2 5/2 = 2.5

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Question { 554 }

Is python case-sensitive?

Answer

Python does care about case. This indicates that it considers identifiers with different cases—like variable names, function names, etc.—to be separate. In Python, for instance, there are two identifiers: variable and variable.

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Question { 584 }

What are operators?

Answer

The unique kinds of symbols called operators are employed to carry out certain operations on variables and values.

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Question { 557 }

What gives java it’s “write once and run anywhere” nature?

Answer

Java's 'write once and run anywhere' nature is achieved by using Java Virtual Machine (JVM) and bytecode. Java code is compiled into bytecode, which can be executed on any platform that has a JVM installed.

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Question { 694 }

What is a static variable?

Answer

To share a variable or method within a class, use the static keyword. Static variables are those that, once defined, are created and shared by all objects at the class level in a single copy.

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