Codewave Technologies Backend Developer Interview Questions and Answers

Q1. "Tailor your resume to highlight role-specific achievements."
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Q2. "Stay updated with industry trends and new technologies."
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Q1. What is the purpose of REST API in backend development?
Ans. 
REST API in backend development is used to allow communication between different systems over the internet.
• Allows for communication between different systems or services

• Follows a client-server architecture

• Uses standard HTTP methods like GET, POST, PUT, DELETE

• Supports multiple data formats like JSON, XML

• Stateless, meaning each request from a client must contain all the information needed to fulfill the request
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Q2. GET, POST, PUT and DELETE
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Q1. What is the difference between GET AND POST methods in HTTPS?
Ans. 
GET method is used to request data from a server, while POST method is used to submit data to a server in HTTPS.
• GET requests data from a specified resource, while POST submits data to be processed to a specified resource.

• GET requests can be cached and remain in the browser history, while POST requests are not cached and do not remain in the browser history.

• GET requests have length restrictions on the amount of data tha...read more
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Q2. GET is Retrieves and POST is Sends data.
Ans. 
GET is used to retrieve data from a server, while POST is used to send data to a server.
• GET requests are used to retrieve data from a specified resource. For example, fetching a list of products from an online store.

• POST requests are used to submit data to be processed by a server. For example, submitting a form with user information to create a new account.

• GET requests are idempotent, meaning they can be repeated mult...read more
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Q1. How does database indexing improve query perfoemance?
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Database indexing improves query performance by reducing the number of disk I/O operations needed to retrieve data.
• Indexing allows the database to quickly locate specific rows in a table, reducing the need to scan the entire table.

• Indexes can be created on columns frequently used in WHERE clauses or JOIN conditions.

• Examples of indexes include primary keys, unique constraints, and composite indexes.

• Proper indexing can s
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Q2. It reduces search time by optimizing lookups.
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Q1. Java,Spring,hibernate,SQL
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DSA - STRING AND ARRAY QUESTION