Programmers.io Technical Lead Interview Questions and Answers

Q1. How does spring injects dependencies
Ans. 
Spring injects dependencies through inversion of control and dependency injection.
• Spring uses inversion of control to manage objects and their dependencies.

• Dependencies are injected into a class through constructor injection, setter injection, or field injection.

• Spring container is responsible for creating and managing objects and their dependencies.

• Example: @Autowired annotation is used for dependency injection in Spr
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Q2. How does Hibernate connects to DB
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Hibernate connects to the database using JDBC (Java Database Connectivity) API.
• Hibernate uses JDBC API to establish a connection to the database.

• It uses JDBC drivers to communicate with the database.

• Hibernate configuration file contains database connection details.

• SessionFactory in Hibernate is responsible for creating sessions and managing connections.
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Q1. How to secure your APIs
Ans. 
Securing APIs involves using authentication, authorization, encryption, and monitoring.
• Implement authentication mechanisms such as OAuth, JWT, or API keys

• Use authorization to control access to APIs based on roles and permissions

• Encrypt data transmission using HTTPS/TLS to prevent eavesdropping

• Implement rate limiting and throttling to prevent abuse and DDoS attacks

• Regularly monitor API traffic and logs for suspicious ac
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Q2. How can you configure multiple DBs in your application
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Multiple DBs can be configured in an application by using database connection pooling, configuring multiple data sources, and managing transactions across databases.
• Use database connection pooling to efficiently manage connections to multiple databases

• Configure multiple data sources in the application to connect to different databases

• Implement transaction management to ensure data consistency across multiple databases
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Q1. Family Background and Career History
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Q2. Salary Expectations
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Logical and reasoning

Linked list, arrays,stack

Q1. Resume based questions
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Q1. More deep in any technology which is working in company
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Q1. Genaral questions
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2 coding questions, Java

Create a website, 7 days

Basic question of English and aptitude

Q1. Oops, html , css javascript and project.
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Q1. Technical mostly related to FastAPI
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Q1. Scenario based questions
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Basic question of English and aptitude

Q1. Oops, html , css javascript and project.
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Q1. What are the different types of variables?
Ans. 
Variables can be classified into several types based on their scope, lifetime, and data type.
• 1. Local Variables: Defined within a function or block, e.g., 'int x = 10;' inside a function.

• 2. Global Variables: Accessible throughout the program, e.g., 'int count;' defined outside any function.

• 3. Static Variables: Retain their value between function calls, e.g., 'static int counter = 0;' inside a function.

• 4. Instance Varia...read more
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