Data Science and Machine Learning (Theory and Projects) A to Z - Variable and Operator: Variables

Data Science and Machine Learning (Theory and Projects) A to Z - Variable and Operator: Variables

Assessment

Interactive Video

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Information Technology (IT), Architecture, Social Studies, Other

University

Hard

The video tutorial introduces variables in Python, explaining their role as symbols that store data. It covers dynamic typing, where the type of a variable is determined by its assigned value, and emphasizes the importance of descriptive variable names for code readability. The tutorial also explores various data types in Python, including integers, floats, strings, and complex numbers. It demonstrates multiple assignment and memory management, showing how variables occupy memory and can be deleted when no longer needed. Practical examples in Jupyter Notebook illustrate these concepts.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a variable in programming?

A function that performs operations

A fixed value that cannot change

A symbol that stores data for later use

A type of data structure

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is true about integers in Python?

They do not have decimal expansions

They are always positive

They can have decimal points

They are stored as strings

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does dynamic typing in Python mean?

Python does not support dynamic typing

You must declare variable types explicitly

Variables cannot change types

Variable types are determined at runtime

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What symbol is commonly used for assignment in Python?

->

==

:=

=

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to use descriptive names for variables?

To increase readability and manageability

To make the code run faster

To avoid syntax errors

To reduce memory usage

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a floating point number in Python?

'5'

5j

5.0

5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a complex number in Python?

A number with a real and imaginary part

A number stored as a string

A number with only a real part

A number with only an imaginary part

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