Tavant Technologies Senior Software Engineer Interview Questions, Process, and Tips

Q1. What is CopyOnWriteArrayList?
Ans. 
CopyOnWriteArrayList is a thread-safe variant of ArrayList where all mutative operations (add, set, remove, etc) are implemented by making a fresh copy of the underlying array.
• CopyOnWriteArrayList is part of the java.util.concurrent package in Java.

• It is used in scenarios where reads are far more common than writes, as it allows for high read concurrency without the need for synchronization.

• It is particularly useful in...read more
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Q2. What is the benefit of Java8 Stream?
Ans. 
Java8 Stream provides a functional approach to processing collections of objects.
• Allows for functional-style operations on collections like map, filter, reduce

• Supports parallel processing for improved performance

• Lazy evaluation allows for efficient processing of large datasets

• Reduces boilerplate code and promotes cleaner, more concise code

• Example: List names = Arrays.asList("Alice", "Bob", "Charlie"); names.stream().f...read more
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Q3. Public subnet vs Private subnet in AWS
Ans. 
Public subnet allows internet access, while private subnet does not.
• Public subnet has a route to the internet gateway, while private subnet does not.

• Instances in public subnet can have public IP addresses, while instances in private subnet cannot.

• Public subnet is typically used for resources that need to be accessed from the internet, while private subnet is used for resources that should not be directly accessible fro
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Q1. What is indexing
Ans. 
Indexing is a technique used to optimize the performance of databases by allowing faster retrieval of data.
• Indexing creates a data structure that improves the speed of data retrieval operations in a database.

• It works by creating an index on one or more columns in a table, allowing the database to quickly locate the rows that match a certain condition.

• Examples of indexing include creating indexes on primary keys, foreig
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Q2. Solid principle
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Q3. Core java questions and giving two coding with snippet
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Q1. Find the duplicate name in student table in sorted way,anagram checker and more coding questions asked from starting to end of interview
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The duration of the interview was around 1 hour. Couple of coding questions and lot of questions on advanced Python programming & AWS
Coding question 1 :
Find the count of letters and print the letter along with its count in a string. Input string was like "aabbbaccb"
The output should be "a2b3a1c2b"

Coding question 2 :
Group the items based on its color.
Input : ["red", "blue", "red", "yellow", "blue", "yellow"]
expected output : ["red", "red", "blue", "blue", "yellow", "yellow"]

Q1. Common questions on .NET and AWS
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Q1. Awaiting for the call
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