20+ Jr Python Developer Interview Questions and Answers

Return the maximum number of unique candy types Alice can have after splitting equally with her brother and following the doctor's advice.

• Create a set of unique candy types

• Calculate the maximum number of candies Alice can have after splitting and following the doctor's advice

• Return the maximum number of unique candy types

I developed a proof of concept for a new feature by conducting research, creating a plan, implementing the feature, and testing it thoroughly.

• Researched the requirements and potential solutions for the new functionality

• Created a detailed plan outlining the steps needed to implement the feature

• Implemented the feature using Python programming language

• Tested the functionality thoroughly to ensure it met the requirements and was bug-free

Return indices of two numbers in array that add up to target

• Use a dictionary to store the difference between target and current number

• Iterate through array and check if current number's complement exists in dictionary

• Return the indices of the two numbers that add up to target

I have 2 years of experience in Python development, working on web applications and data analysis projects.

• Developed web applications using Django framework

• Utilized Python for data analysis and visualization using libraries like Pandas and Matplotlib

• Experience with RESTful APIs and integrating third-party services

• Worked on automation scripts using Python

The number of operations required to make either num1 or num2 equal to 0 is the sum of num1 and num2.

• Add num1 and num2 to get the total number of operations required.

• In this case, num1 = 2 and num2 = 3, so the total number of operations required is 2 + 3 = 5.

Lambda function is an anonymous function in Python. List is a collection of items. Append adds an element to a list, while extend adds elements from another list. Pandas is a Python library for data manipulation. CSV files can be read using pandas.

• Lambda function is a small anonymous function defined with the lambda keyword.

• List is a collection of items enclosed in square brackets, separated by commas.

• Append is used to add a single element to the end of a list.

• Extend is used ...read more

There are 7 types of operators in Python.

• Arithmetic operators (+, -, *, /, %, //, **)

• Comparison operators (==, !=, >, <, >=, <=)

• Assignment operators (=, +=, -=, *=, /=, %=, //=, **=)

• Logical operators (and, or, not)

• Bitwise operators (&, |, ^, ~, <<, >>)

• Identity operators (is, is not)

• Membership operators (in, not in)

Lambda function is an anonymous function that can be defined in a single line of code.

• Lambda functions are used for simple and concise operations.

• They can take any number of arguments but can only have one expression.

• They are often used as arguments for higher-order functions.

• Example: lambda x: x**2 defines a function that squares its input.

MySQL is a popular open-source relational database management system. HTML is a markup language used for creating web pages, and CSS is a stylesheet language used for styling web pages.

• MySQL is a database management system that allows users to store, manage, and retrieve data.

• It uses a structured query language (SQL) to interact with the database.

• MySQL is widely used in web development for storing and retrieving data from websites and web applications.

• HTML (Hypertext Markup L...read more

numpy is a Python library for numerical operations on arrays and matrices. JavaScript is a programming language for web development.

• numpy is used for mathematical and logical operations on arrays.

• It provides efficient and fast operations on large datasets.

• JavaScript is used for client-side and server-side web development.

• It allows interactive and dynamic features on websites.

• JavaScript can manipulate HTML elements and handle user interactions.

Python is a high-level programming language known for its simplicity, readability, and versatility. It is widely used for web development, data analysis, artificial intelligence, and more.

• Python is easy to learn and read, making it a great choice for beginners and experienced developers alike.

• Python has a large standard library and many third-party packages, making it suitable for a wide range of applications.

• Python is used in various fields such as web development (Django, F...read more

Lambda functions are anonymous functions that can be defined without a name.

• Lambda functions are defined using the lambda keyword.

• They can take any number of arguments, but can only have one expression.

• They are often used as arguments for higher-order functions.

• Example: lambda x: x**2 defines a lambda function that squares its input.

Multi threading is a programming concept where multiple threads within a process execute independently to improve performance.

• Allows for concurrent execution of tasks within a single process

• Can improve performance by utilizing multiple CPU cores

• Requires careful synchronization to avoid race conditions

• Example: Running a web server that can handle multiple client requests simultaneously

Tuple is an immutable data structure in Python that stores a collection of elements.

• Tuples are ordered and indexed collections of elements.

• They are defined using parentheses () and can contain elements of different data types.

• Tuples are immutable, meaning their elements cannot be changed once they are created.

• Example: my_tuple = (1, 'hello', 3.14)

Numpy is a Python library for numerical computing with support for large, multi-dimensional arrays and matrices.

• Numpy provides efficient mathematical operations on arrays.

• It is widely used in scientific computing, data analysis, and machine learning.

• Numpy arrays are homogeneous and can be indexed and sliced like lists.

• Broadcasting allows for element-wise operations on arrays of different shapes.

• Numpy also includes linear algebra, Fourier transform, and random number functions...read more

Pandas is a Python library used for data manipulation and analysis.

• Pandas provides data structures for efficiently storing and manipulating large datasets.

• It offers tools for data cleaning, merging, reshaping, and visualization.

• Pandas can handle various data formats such as CSV, Excel, SQL databases, and JSON.

• It is widely used in data science, finance, economics, and other fields.

• Example: df = pd.read_csv('data.csv') creates a pandas DataFrame from a CSV file.

Inheritance is a mechanism in object-oriented programming where a new class is created from an existing class.

• Allows for code reuse and avoids redundancy

• The new class (subclass) inherits properties and methods from the existing class (superclass)

• Subclass can add new properties and methods or override existing ones

• Example: A Car class can inherit properties and methods from a Vehicle class

Dict is a built-in data type in Python used to store key-value pairs.

• Dict functions include keys(), values(), items(), get(), pop(), update(), clear().

• Example: dict.keys() returns a list of all keys in the dictionary.

• Example: dict.get('key') returns the value associated with 'key'.

List is mutable, tuple is immutable in Python.

• List can be modified (add, remove, change elements), tuple cannot be modified.

• List is defined using square brackets [], tuple is defined using parentheses ().

• List is used when we have a collection of items that may need to be changed, tuple is used when we have a collection of items that should not change.