Mobileum Software Engineer Trainee Interview Questions and Answers

Q1. DSA Array, String and Hashmap questions
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Q2. Functional programming java questions
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Q1. Spring and spring boot related
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Q2. HLD scenario level questions
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Q3. SQL queries nested and joins
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Q4. DB related questions and experience level questions and previous project situations related questions
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Q5. Security level questions like XSS vulnerability and SQL injection
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Q1. What is the inheritance?
Ans. 
Inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class.
• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can override or extend the functionality of the base class
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Q2. What are the types of joins in mysql
Ans. 
Types of joins in MySQL include inner join, left join, right join, and full join.
• Inner join: Returns rows when there is a match in both tables.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the left table.

• Full join: Returns rows when there is a match in one of the tables.
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Q1. How to handle multiple api's
Ans. 
Use a centralized API gateway to manage and route requests to multiple APIs efficiently.
• Implement a centralized API gateway to handle incoming requests and route them to the appropriate API based on the endpoint.

• Utilize API management tools like Apigee, Kong, or AWS API Gateway to manage and monitor multiple APIs.

• Consider implementing a caching layer to improve performance and reduce the number of requests to external
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Q2. What does strstr function do?
Ans. 
strstr function searches for a substring within a string and returns a pointer to the first occurrence of the substring.
• Used in C programming language

• Syntax: char *strstr(const char *haystack, const char *needle)

• Example: char *str = strstr("hello world", "world")
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A good, basic understanding will suffice.

Q1. Questions about OOPs, DBMS. Fundamental understanding will work
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Coding is important three problems and mcqs of java and testing

Q1. Oops concepts were asked
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Q2. Java questions static jvm and all
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Q1. Explain the technology stack you have been working on.
Ans. 
I have been working on a technology stack that includes Java, Spring Boot, Angular, and MySQL.
• Java programming language for backend development

• Spring Boot framework for building and deploying Java applications

• Angular framework for frontend development

• MySQL database for data storage and retrieval
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Q2. Deep dive into the .Net framework and its use in developing microservices using Web APIs
Ans. 
The .Net framework is a powerful tool for developing microservices using Web APIs.
• The .Net framework provides a set of libraries and tools for building scalable and reliable microservices.

• Web APIs in .Net allow for easy communication between different services and clients.

• Features like dependency injection and middleware in .Net make it easier to develop and maintain microservices.

• Examples of popular frameworks for bui...read more
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Q1. Explain how you would troubleshoot a network bottleneck in your web API application hosted in a public cloud like Azure or AWS.
Ans. 
To troubleshoot a network bottleneck in a web API application hosted in a public cloud like Azure or AWS, one can analyze network traffic, monitor server performance, and optimize resource allocation.
• Use network monitoring tools to analyze traffic patterns and identify potential bottlenecks.

• Monitor server performance metrics such as CPU usage, memory usage, and disk I/O to pinpoint any resource constraints.

• Optimize res...read more
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Q2. Explain the usage of Azure service fabric clusters
Ans. 
Azure Service Fabric clusters are used to deploy and manage microservices-based applications on Microsoft Azure.
• Azure Service Fabric clusters provide a platform for deploying and managing scalable and reliable microservices.

• They offer automatic scaling, rolling upgrades, and health monitoring for microservices.

• Service Fabric clusters can be used to deploy stateless or stateful microservices.

• They support multiple progra...read more
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There will be 3 coding questions given to us for solving,we need solve two questions compulsory.

Q1. Introduce yourself
Ans. 
I am a software engineer with 5 years of experience in developing web applications using Java, Spring, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring, and Angular

• Strong problem-solving skills
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Q2. Questions related to frontend
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It included question from aptitude, reasoning, English, CSE fundamentals like oops and sql

Q1. It included everything which was mentioned in your resume
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Q1. Same as round 2, it has few managerial questions as well
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Q1. Tell me about your self
Ans. 
I am a passionate software developer with 5 years of experience in building web applications using various technologies.
• 5 years of experience in software development

• Proficient in building web applications

• Skilled in using various technologies
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Q2. Resume discussion
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