One Network Enterprises Senior Systems Engineer Interview Questions and Answers

Java mcq and rest api mcq

Q1. Write the program to reverse a string
Ans. 
Program to reverse a string using array of characters
• Create an array of characters to store the input string

• Iterate through the input string and store each character in the array

• Iterate through the array in reverse order to construct the reversed string
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Q2. Basic questions on java and java 8 features
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Q3. Method used in rest AP
Ans. 
REST APIs typically use HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations on resources.
• GET - retrieve data from a server

• POST - create new data on a server

• PUT - update existing data on a server

• DELETE - remove data from a server
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Q4. Diff between put and post method
Ans. 
PUT is used to update or replace an existing resource, while POST is used to create a new resource.
• PUT is idempotent, meaning multiple identical requests will have the same effect as a single request.

• POST is not idempotent, meaning multiple identical requests may have different effects.

• PUT is used when the client knows the specific URI of the resource it wants to update.

• POST is used when the server assigns a URI for th
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