Osource Global Software Developer Interview Questions and Answers

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Q1. The candidate should possess a strong knowledge of programming skills.
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Q2. Sting manpulation
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Q3. Object oriented programming
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Q4. Exception handling
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Q5. Looping statement
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Q1. Union and union all difference
Ans. 
UNION combines the results of two or more SELECT statements, while UNION ALL includes duplicates.
• UNION removes duplicate rows, while UNION ALL retains all rows including duplicates

• UNION is slower than UNION ALL as it performs a distinct operation

• UNION requires the same number of columns in the SELECT statements, while UNION ALL does not have this restriction
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Q2. What is generic and non-generic collections
Ans. 
Generic collections allow storing any type of data, while non-generic collections are type-specific.
• Generic collections can store any type of data, such as List or Dictionary.

• Non-generic collections are type-specific, like ArrayList or HashTable.

• Generic collections provide type safety and better performance compared to non-generic collections.
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Q1. OOPS & CORE JAVA CONCEPTS
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Q2. Concepts such as Polymorphism and inheritance
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Q1. Normally not that though, smooth process
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Q2. Tell me about job responsibilities
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Q1. What is the Middleware
Ans. 
Middleware is software that connects different applications or services, enabling them to communicate and manage data exchange.
• Acts as a bridge between different software applications.

• Facilitates communication and data management in distributed systems.

• Examples include message brokers like RabbitMQ and API gateways.

• Can provide services like authentication, logging, and transaction management.

• Used in microservices archi...read more
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Q2. What is dependency injection
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