PubMatic Senior Software Engineer Interview Questions and Answers for Experienced

Q1. Http method code
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Q2. Difference between soap and rest
Ans. 
SOAP is a protocol for exchanging structured information in web services, while REST is an architectural style for designing networked applications.
• SOAP is a protocol, while REST is an architectural style

• SOAP uses XML for message format, REST can use various formats like JSON, XML, etc.

• SOAP has built-in error handling, REST relies on HTTP status codes

• SOAP requires more bandwidth and resources, REST is lightweight and s...read more
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Q3. Difference between delete an truncate
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Delete removes rows one by one while truncate removes all rows at once.
• Delete is a DML command while truncate is a DDL command.

• Delete operation can be rolled back while truncate operation cannot be rolled back.

• Delete operation fires triggers for each row deleted while truncate does not.

• Delete operation is slower than truncate operation for large tables.

• Example: DELETE FROM table_name WHERE condition; TRUNCATE TABLE tab
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Q4. Idempotent methods
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Java, SQL, SDLC agile, db queries, Http response and request codes status

Q1. Questions related to resume, ds we worked on, http status cod eand response, related to rest api
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Q2. Hash set internal working, how do you fine second largest element in an array without sorting,
Ans. 
Finding second largest element in an array without sorting using hash set.
• Create a hash set and iterate through the array, adding each element to the set.

• Initialize two variables to keep track of the largest and second largest elements.

• Iterate through the set and compare each element to the largest and second largest variables.

• Return the second largest variable.
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Q3. Idempotent methods, safe methods in http, rest api working, to find en element from binary array related program
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Q1. Same as technical 2, more ds related questions and http rest related
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Q1. Salary discussion ask as much as you can, don't hesitate
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25 questions, MCQs related to cloud and basic CSE questions.

Q1. Mostly related to how you are going to design a certain scenario.
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Q1. Regarding salary negotiation.
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Q1. Technical questions related to role
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Q2. JavaScript,Github
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Q1. Another round with senior technical person, Techno managerial kind of round
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It was technical aptitude test on hackerearth

Q1. Coding questions followed by some puzzles
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Q2. Was asked about datastructures like dictionary and hash maps working
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Q3. SQL questions but basic
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Q1. This was techno-managerial round heavy on puzzles and some advanced technical questions. Study about API working
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Q2. Basic python programming is necessary
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