Tiger Analytics Senior Engineer Interview Questions and Answers

Q1. Internal working of hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• HashMap uses the hashCode() method of ke...read more
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Q2. What are the feature of jdk 8
Ans. 
JDK 8 features include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to write code in a more concise and readable way.

• Functional interfaces enable the use of lambda expressions.

• Streams provide a way to work with sequences of elements efficiently.

• Default methods allow interfaces to have concrete methods.

• Date and Time API improvements.
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Q1. Basic concepts of java , spring boot , angular and some coding Average interview . easy to crack if basics are clear
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Q1. Little more deep on java , angular and some scenario based questions
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Objective technical question was given.

Q1. Java, DB, Spring, UI related questions asked.
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Q2. CoreJava Multi-threading
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Q3. Database many to many relattionship related question
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Q1. Mutli-threading related questions
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Q1. Salary expectation and joining details.
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Q1. Java 8 vs 7 case studies. Stream vs collections case studies.
Ans. 
Java 8 introduced streams which are more efficient than collections in certain cases.
• Streams are useful for processing large amounts of data in parallel

• Collections are better for small amounts of data or when modifying data

• Java 8's stream API provides a functional programming approach to data processing

• Java 7's collections API is more traditional and imperative

• Example: Using streams to filter and map data from a databa...read more
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Q1. Add one to a given String of number
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Add one to a given String of number
• Convert the string to integer, add one, and convert back to string

• Handle edge cases like leading zeros

• Consider using built-in functions like parseInt() and toString()
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Q1. Hash map implementation. exception handling in lambda exp. microservices architecture.
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Q1. Why u want to join?
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Hacker Rank Questions - String Manipulation - level easy

Hacker Rank Questions - 2D matrix - level easy

Q1. Expected Salary
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Q2. Why do you choose Apexon?
Ans. 
I choose Apexon for its innovative technology, strong company culture, and opportunities for growth.
• Innovative technology: Apexon is known for its cutting-edge solutions and commitment to staying ahead of industry trends.

• Strong company culture: I value the emphasis Apexon places on teamwork, collaboration, and employee development.

• Opportunities for growth: Apexon offers a clear path for career advancement and continuou
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Basic coding question and JavaScript in depth questions

Q1. Difference between deep and shallow copy
Ans. 
Deep copy creates a new object and recursively copies all nested objects, while shallow copy creates a new object and copies the references to nested objects.
• Deep copy duplicates all levels of the object hierarchy, ensuring that changes in the copied object do not affect the original object.

• Shallow copy only duplicates the top-level object, so changes in the copied object may affect the original object.

• Deep copy is mor...read more
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Q2. Ways to set values in form groups
Ans. 
Ways to set values in form groups
• Use setValue() method to set values in form groups

• Use patchValue() method to set values in form groups

• Use reset() method to set values in form groups
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Q3. How to add dynamic component in view
Ans. 
To add a dynamic component in a view, use a framework or library that supports dynamic rendering and component creation.
• Use a framework like React or Angular that allows for dynamic component creation

• Create a component factory or use a component resolver to dynamically create and render components

• Pass data or props to the dynamic component to customize its behavior

• Update the view or component tree to include the dynami
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