VVDN Technologies Senior Software Developer Interview Questions and Answers

Q1. A coding querstion on linkedlist implementation
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Q2. Python basic questions like decorator, singleton class, OOPS
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Q1. Microservice Architecture
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Q2. Rest api vs soap api
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REST API is lightweight, flexible, and widely used, while SOAP API is more rigid and heavy.
• REST API uses standard HTTP methods like GET, POST, PUT, DELETE, while SOAP API uses XML for communication.

• REST API is stateless and can be cached, making it faster, while SOAP API is stateful and requires more bandwidth.

• REST API is easier to implement and understand, while SOAP API has more built-in security features.

• Examples: R
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Q1. What is the difference between map and flat map
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Map transforms each element of a collection, while flatMap transforms each element into a new collection and flattens the result.
• Map applies a function to each element of a collection and returns a new collection with the results

• FlatMap applies a function that returns a collection to each element of a collection, then flattens the result into a single collection

• Example: map([1, 2, 3], x => [x, x+1]) returns [[1, 2], [2...read more
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Q2. What is the difference between comparable and comparator
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Comparable is an interface used for comparing objects, while Comparator is a separate class used for custom sorting.
• Comparable is implemented by the class whose objects need to be compared, while Comparator is a separate class used for custom sorting.

• Comparable has a single method, compareTo(), which is used to compare objects, while Comparator has a method, compare(), for custom sorting logic.

• Comparable is used for na...read more
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It was an on-campus round. Aptitude was around technical computer questions.

Q1. JavaScript advance interview questions
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Q2. Angular question and execution of scripts
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Technical round: where they will ask you about the technical questions in your technology and few coding questions.

Data Structures and Algorihms round