Osource Global Software Engineer Interview Questions and Answers

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Q1. OOPs concepts basics
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Q2. Sql basics questions
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Q3. Project related questions mostly
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Q4. C# dotnet question.
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Q1. Tell me about yourself
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I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java, Python, and web development technologies

• Strong problem-solving skills

• Team player with excellent communication skills
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Q2. Some basic personal questions
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Q1. Basic Java concepts - Oops, collection
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Q1. Database query of MySQL
Ans. 
MySQL database query
• Use SELECT statement to retrieve data from tables

• Use WHERE clause to filter data based on conditions

• Use JOIN to combine data from multiple tables

• Use ORDER BY to sort data in ascending or descending order

• Use LIMIT to limit the number of rows returned
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Q2. About React.js what is axios call, workflow of connection made with backend
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Q1. Bout your project
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Q2. About technical skills
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Q3. About handling problems
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Q4. Technical questions
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Q5. Namdjjdjdjdjdjf
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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

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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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