Techtree It Systems Interview Questions, Process, and Tips

Q1. Would you like join immediately?
Ans. 
Yes, I am available to join immediately.
• I am excited about the opportunity and ready to start right away.

• I have completed all necessary preparations to transition smoothly into the role.

• I am eager to contribute to the team and start making an impact.

• I have no prior commitments that would prevent me from joining immediately.
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Q2. Are you ready to relocate to Belgaum?
Ans. 
Yes, I am open to relocating to Belgaum for the Android Developer position.
• I am willing to relocate for the right opportunity

• I have experience adapting to new environments

• Belgaum offers a great opportunity for growth in the tech industry
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Q1. Are you familiar with android?
Ans. 
Yes, I am familiar with Android development and have experience in creating mobile applications for the platform.
• Experienced in developing Android applications using Java or Kotlin

• Knowledge of Android SDK, Android Studio, and different versions of Android OS

• Familiar with RESTful APIs, JSON, and third-party libraries like Retrofit and Glide
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Q2. Briefly explan your projects.
Ans. 
I have worked on various Android projects including e-commerce apps, social networking apps, and productivity tools.
• Developed an e-commerce app with payment gateway integration

• Created a social networking app with real-time messaging features

• Designed a productivity tool for task management and collaboration
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Q3. Questions on Oops concepts in java
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Q1. First question he ask me to write spring boot application with controller, repo and service class to retrive all employee details.
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Q2. After that mid level sql query related to my current project
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Q3. Where do you setup transaction managment in spring boot project
Ans. 
Transaction management can be set up in Spring Boot project using @Transactional annotation.
• Use @Transactional annotation on methods that require transaction management

• Configure transaction manager bean in application context

• Use @EnableTransactionManagement annotation on configuration class

• Specify transaction attributes such as isolation level and propagation behavior

• Example: @Transactional(propagation = Propagation.RE...read more
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Q4. How to setup payment gateway for paypal in spring boot
Ans. 
To setup payment gateway for PayPal in Spring Boot, you need to integrate PayPal SDK and configure the necessary properties.
• Add PayPal SDK dependency in pom.xml

• Configure PayPal properties in application.properties

• Implement PayPal payment service

• Integrate PayPal payment service with your application

• Test the payment flow
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Q5. @springBootApplication, @RestController, Concurrent Modification Exception, how to avoid this exception if we are using list interface.
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Q6. Different Http error code explanation like 422,304. sql procedure and function, how to write custom exception.
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Q7. Servlet related questions
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Q8. Write sql and hql custom query in spring boot application
Ans. 
Answer on how to write SQL and HQL custom queries in Spring Boot application
• To write SQL queries in Spring Boot, use JdbcTemplate or NamedParameterJdbcTemplate

• To write HQL queries, use Hibernate's SessionFactory and Query objects

• Example: JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource); String sql = "SELECT * FROM table WHERE column = ?"; List results = jdbcTemplate.query(sql, new Object[] { value });

• Example: S...read more
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Moderate level...............

Q1. Modelling,er diagram
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Q2. Queries like duplicate, join
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Q1. What is DNS server.
Ans. 
DNS server is a system that translates domain names into IP addresses to enable communication over the internet.
• DNS servers store a database of domain names and their corresponding IP addresses.

• They help in resolving domain names to IP addresses for internet communication.

• DNS servers use a hierarchical system to distribute the workload and improve efficiency.

• Examples of popular DNS servers include Google DNS, OpenDNS,
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