Testpress Python Software Developer Interview Questions and Answers

Q1. What is a Python program that can be used to determine the best price for selling stocks?
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Q2. Can you write a Python program to determine whether two given words are anagrams of each other without using built-in functions?
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Q1. Create new list from the provided list but the order should be shuffled and no duplicate element should be removed
Ans. 
Create a new list with shuffled order and no duplicate elements.
• Use the random.shuffle() function to shuffle the list

• Use a set to keep track of elements already added to the new list to avoid duplicates

• Convert the set back to a list to maintain the order of elements
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Q2. Architecture of existing application
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The existing application follows a microservices architecture with separate components for different functionalities.
• The application is divided into multiple services that communicate with each other through APIs.

• Each service is responsible for a specific task or functionality, promoting modularity and scalability.

• Examples of microservices in the architecture include user authentication service, payment processing serv
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Q1. Why do you want to join
Ans. 
I am passionate about Python development and excited about the innovative projects your company is working on.
• Passionate about Python development

• Excited about innovative projects at company

• Seeking growth and learning opportunities
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Q2. Where do you see yourself in 5 years
Ans. 
In 5 years, I see myself as a senior Python developer leading a team of developers on innovative projects.
• Continuing to enhance my Python skills and staying updated on new technologies

• Taking on more leadership responsibilities and mentoring junior developers

• Contributing to the success of the company through my technical expertise
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Q1. What is http? rest api?
Ans. 
HTTP is a protocol used for transferring data over the internet. REST API is a set of rules for building web services.
• HTTP stands for Hypertext Transfer Protocol, used for communication between web servers and clients

• REST API (Representational State Transfer) is a set of rules for building web services that adhere to the principles of REST

• RESTful APIs use standard HTTP methods like GET, POST, PUT, DELETE to perform CRU...read more
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Q2. What is time complexity?
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Time complexity refers to the amount of time an algorithm takes to run as a function of the input size.
• It measures how the runtime of an algorithm grows as the input size increases.

• Common time complexities include O(1) constant time, O(log n) logarithmic time, O(n) linear time, O(n^2) quadratic time, and O(2^n) exponential time.

• Understanding time complexity helps in analyzing and optimizing algorithms for efficiency.

• Ex...read more
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30mins on diff python and flask

Q1. Data structures
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Q2. Object orientation
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Round 1- 20 Ques (Foundation)
Round 2- 15 Ques (Advanced-contains both Quants and Logical

3-4 questions are asked

Q1. What are interrupts?
Ans. 
Interrupts are signals sent to the CPU to temporarily suspend the current program and handle a specific event or request.
• Interrupts allow the CPU to respond to events in real-time without wasting processing power.

• They can be generated by hardware devices, software programs, or the CPU itself.

• Examples include keyboard input, timer expiration, and hardware errors.
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Q2. What do you mean by SQL Correlated Subqueries?
Ans. 
SQL correlated subqueries are subqueries that reference columns from the outer query.
• Correlated subqueries are executed for each row processed by the outer query.

• They are used to filter results based on values from the outer query.

• Example: SELECT * FROM table1 WHERE column1 = (SELECT MAX(column2) FROM table2 WHERE table2.id = table1.id)
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Q1. What is a one-line function?
Ans. 
A one-line function is a function written in a single line of code, typically used for simple operations.
• One-line functions are concise and easy to read, often used for simple tasks like mathematical operations or string manipulation.

• They are commonly used in lambda functions in Python.

• Example: lambda x: x**2
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Q2. What is polymorphism in OOps?
Ans. 
Polymorphism in OOPs refers to the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

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

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: In Python, the '+' operator can be us...read more
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Q3. Remove duplicates from the table.
Ans. 
Use SQL query with DISTINCT keyword to remove duplicates from the table.
• Use SELECT DISTINCT column_name FROM table_name to retrieve unique values from a specific column.

• Use DELETE FROM table_name WHERE column_name IN (SELECT column_name FROM table_name GROUP BY column_name HAVING COUNT(*) > 1) to remove duplicates from the table.
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Q4. Join two tables?
Ans. 
Use SQL JOIN to combine rows from two tables based on a related column between them.
• Use JOIN keyword in SQL to combine rows from two tables based on a related column

• Types of JOINs include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 JOIN table2 ON table1.column = table2.column
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Easy and medium leetcode problem