Wenzins Software Developer Interview Questions and Answers for Experienced

Array, logistics ,ml,

Q1. How to add list
Ans. 
To add a list in programming, you can use arrays or lists depending on the language.
• In Python, you can add elements to a list using the append() method.

• In Java, you can add elements to an ArrayList using the add() method.

• In JavaScript, you can add elements to an array using the push() method.
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Q1. Why u need to join this
Ans. 
I am passionate about software development and believe this company offers exciting opportunities for growth and innovation.
• Exciting projects and challenges at this company

• Opportunities for growth and learning

• Innovative work environment

• Passionate about software development
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Q1. Tell about ursellf and experiences
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Q2. Coding program and complexity
Ans. 
Coding programs can vary in complexity depending on the requirements and functionalities needed.
• Complexity can be measured using Big O notation, which describes the worst-case scenario for time and space complexity.

• Factors affecting complexity include data structures used, algorithms implemented, and the size of input data.

• Examples of complex programs include machine learning algorithms, large-scale distributed systems
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Q1. Dynamic pragramming backtracking coding
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Q2. Experinces and how you perform
Ans. 
I have over 5 years of experience in software development, with a strong focus on web applications and database management.
• Developed web applications using HTML, CSS, JavaScript, and various frameworks like Angular and React

• Proficient in database management with SQL and NoSQL databases such as MySQL and MongoDB

• Experience in version control systems like Git for collaborative development

• Strong problem-solving skills and ...read more
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Q1. What is OOps concept
Ans. 
Object-oriented programming paradigm focusing on objects and classes for code organization and reusability.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

• Inheritance: Ability for a class to inherit properties and behavior from another class

• Polymorphism: Ability for objects to be treated as instances of their parent class or their own class

• Abstraction: Hiding complex impleme...read more
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Q2. What is java 8
Ans. 
Java 8 is a major release of the Java programming language with new features like lambda expressions, streams, and functional interfaces.
• Introduced lambda expressions for functional programming

• Added streams API for processing collections

• Included default methods in interfaces for backward compatibility

• Introduced new Date and Time API (java.time package)
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Q1. Asked about general questions
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Q1. How is GIL and how python handle multi threading
Ans. 
GIL stands for Global Interpreter Lock in Python, which limits execution of multiple threads at once.
• GIL is a mutex that protects access to Python objects, preventing multiple threads from executing Python bytecodes at once.

• Due to GIL, Python threads are not suitable for CPU-bound tasks but are still useful for I/O-bound tasks.

• To handle multi-threading in Python, one can use multiprocessing module or asynchronous progr...read more
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Q2. Explain How React works under the hood.
Ans. 
React uses a virtual DOM to efficiently update the actual DOM based on changes in state or props.
• React creates a virtual DOM representation of the actual DOM.

• When state or props change, React compares the virtual DOM with the actual DOM to determine the minimal set of changes needed.

• React then updates the actual DOM efficiently to reflect the changes.
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2 problem related to graphs and dynamic programming 45min I was given to solve I was able to solve both of them and got shortlisted for the next round.

Q1. Started with Basic introduction about myself and my experiences then moved directly to a problem from leetcode based on hashing + sliding window I was able to provide the solution.
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In person , asked two questions, 1 about linked list and other about array

Q1. System design problem related to Uber
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Q2. Asked about micro services and design patterns
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Q1. Deep knowledge of Java JVM and Collections is needed.
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Q1. Whats your experience in Elk ? Why ELK
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