VassarLabs Full Stack Software Developer Interview Questions and Answers

Q1. Life cycle of thread
Ans. 
Thread life cycle includes new, runnable, running, blocked, and terminated states.
• Thread is created in 'new' state

• It becomes 'runnable' when start() method is called

• Thread enters 'running' state when CPU starts executing its run() method

• It can go to 'blocked' state if it's waiting for a resource

• Finally, thread reaches 'terminated' state when run() method completes or stop() method is called
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Q2. İnternal working of hash map
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Hash map is a data structure that stores key-value pairs and uses a hash function to map keys to their corresponding values.
• Hash map consists of an array of buckets, each containing a linked list of key-value pairs.

• When inserting a key-value pair, the hash function is used to determine the index of the bucket where the pair should be stored.

• To retrieve a value, the hash function is used to find the corresponding bucket...read more
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Q1. Salary expectations
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Q2. Why I want to change the job
Ans. 
Seeking new challenges, growth opportunities, and a better work-life balance.
• Looking for new challenges and opportunities to learn and grow

• Seeking a better work-life balance

• Interested in working with new technologies or in a different industry

• Wanting to advance career progression
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Q1. Java related questions
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Q2. Core java, Java 8
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Random Programming questions

Q1. What is JPA
Ans. 
JPA (Java Persistence API) is a specification for managing relational data in Java applications using object-relational mapping.
• JPA provides a way to map Java objects to database tables.

• It simplifies database interactions through an object-oriented approach.

• Common implementations include Hibernate, EclipseLink, and OpenJPA.

• Example: Using JPA annotations like @Entity to define a persistent class.

• JPA supports querying wi...read more
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Q2. Write a program to find duplicate elements in the list
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This program identifies and returns duplicate elements from a given list.
• Use a set to track seen elements and a list for duplicates.

• Iterate through the list and check if an element is in the set.

• If it is, add it to the duplicates list; otherwise, add it to the set.

• Example: For the list [1, 2, 3, 2, 4, 3], the output should be [2, 3].
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Q1. Taxation related questions & GST related questions
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Questions about Basic finance and overall like any CET exams questions

Easy as you will get chance to talk about your views on topic given by interviewer

Q1. Tell me about Yourself
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Q2. Tell me About projects you have done
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Q3. What you have done in your internship
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