Wissen Technology Lead Software Engineer Interview Questions and Answers

Q1. Java 8, stream operations, collection framework in depth
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Q2. Microservice architecture with sprong boot
Ans. 
Microservice architecture with Spring Boot is a popular approach to building scalable and resilient applications.
• Spring Boot provides a convenient way to create and deploy microservices

• Each microservice should have a clear and well-defined responsibility

• Communication between microservices can be achieved through REST APIs or messaging systems like Kafka

• Containerization with Docker and orchestration with Kubernetes can ...read more
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Q3. Spring security and transaction management
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Q1. Current Project in depth, roles and responsibilities
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Q2. Reason for change, design patterns
Ans. 
Design patterns are used to solve common software design problems and improve code quality.
• Design patterns provide reusable solutions to common software design problems.

• They improve code quality by promoting best practices and reducing code complexity.

• Examples of design patterns include Singleton, Factory, and Observer patterns.

• Reasons for changing design patterns may include improving performance, scalability, or main...read more
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Q3. Amazon web services, cloud front, lambda, ec2
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Q1. What are your salary expectations?
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Q2. Why are you looking for a change?
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Q1. Technical round
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Q1. Hr will not tell correct information
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Q1. No job security in this company mostly they hire contract base
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Q1. Not good for job security and salary package is less
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Q1. Spark architecture pyspark coding sql coding
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Q1. Spark architecture sql window functions,aggreate functions pyspark data frame coding
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They asked various technology related questions such as ML, JS, OOPs, DBMS, OS etc

Q1. It was resume based interview. First introduce yourself. Question about ML( Mentioned in my resume) SQL query related to 'LIKE' ONE coding question(reverse string)
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Q2. Reverse String Search a pattern in database.(related to LIKE) What is normalization(ML)
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Q1. Round was named HR but it was like one to one discussion about desired location etc
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Q1. Angular Life Cycle hooks AOT vs JIT Call stack and event loop ngOnchanges vs ngDocheck @hostlistner component interaction content projection call, apply bind
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Duration 30 minutes, topics were related to Javascript and Angular

Q1. Write a program to find count of character from a string. Write a program to sort array without using sort method
Ans. 
Program to count characters in a string and sort an array without using sort method
• Use a loop to iterate through the string and count each character

• For sorting an array, use a loop to compare each element with all other elements and swap if necessary

• Implement a sorting algorithm like bubble sort, insertion sort or quick sort
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Q1. Technical questions on oops, c#, sql, api
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Q1. A bit deeper about .net and previous work experience
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Q1. Scenario based Questions
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How social media affect

Q1. What is inheritance explain it with prime no program.
Ans. 
Inheritance is a mechanism in OOP where a class acquires properties and methods of another class.
• Inheritance allows code reusability and promotes code organization.

• A subclass can inherit properties and methods from a superclass.

• The subclass can also override or add new properties and methods.

• Example: Prime number program can have a superclass 'Number' and a subclass 'PrimeNumber' that inherits properties and methods fr
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Q2. What is my project during my internship.
Ans. 
During my internship, my project was to develop a mobile application for tracking and managing inventory.
• Developed a mobile application using React Native

• Implemented features for scanning barcodes and updating inventory

• Integrated with backend APIs to fetch and update data

• Worked in a team to ensure timely delivery of the project
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