Sonata Software Senior Developer Interview Questions and Answers

Technical questions and reasoning questions

Q1. General profile check
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Q1. Explain dependency injection, indexes in sql, SOLID principles.
Ans. 
Dependency injection is a design pattern where dependencies are injected into a class rather than created within the class itself.
• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing and maintenance of code.

• Example: Constructor injection, setter injection, and interface injection are common types of dependency injection.

• Indexes in SQL are used to improve the performance of...read more
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Q1. SOLID principles
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Q2. Microservice Architecture and Kafka
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Q1. What is java and its features ?
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Java is a high-level programming language known for its platform independence and object-oriented features.
• Java is platform-independent, meaning it can run on any device with a Java Virtual Machine (JVM)

• It is object-oriented, allowing for the creation of reusable code and modular programs

• Java is known for its robust standard library, providing a wide range of pre-built functionality

• It supports multithreading, allowing ...read more
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Q2. What is java 8 and features
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Java 8 is a major release of the Java programming language with new features like lambda expressions, streams, and default methods.
• Lambda expressions allow you to treat functionality as a method argument.

• Streams provide a new abstraction to work with sequences of elements.

• Default methods allow interfaces to have method implementations.

• Date and Time API provides a new way to work with dates and times.

• Optional class help
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Topic about what happens when actress enter into politics

Q1. Design pattern how we used in programming language
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Q1. Difference between Procedure, Packages and functions.
Ans. 
Procedures, Packages and Functions are all subprograms in PL/SQL with different characteristics.
• Procedures are subprograms that perform a specific task and may or may not return a value.

• Functions are subprograms that always return a value and can be used in SQL statements.

• Packages are a collection of related procedures, functions, variables, and other program constructs that can be used as a single unit.

• Packages provid...read more
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Q2. If table or view does not exist what does it mean
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It means that the table or view does not exist in the database.
• The query will fail and return an error message.

• The application may crash or behave unexpectedly.

• The table or view may have been deleted or renamed.

• Check the spelling and syntax of the query.

• Make sure the database connection is established and valid.
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Q3. Difference Between Views and Materialized Views
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Views are virtual tables while Materialized Views are physical tables.
• Views are created using SELECT statement while Materialized Views are created using CREATE MATERIALIZED VIEW statement.

• Views do not store data while Materialized Views store data.

• Views are updated dynamically while Materialized Views are updated manually or automatically based on refresh settings.

• Materialized Views are faster for read-heavy workloads...read more
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Q1. Details explanation about the projects and the concepts what we used.
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Q1. Javascript ,React, HTML ,CSS,unit testing
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Q1. Javascript,React js,HTML,CSS, unit testing
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