Enfin Technologies Full Stack Software Developer Interview Questions and Answers

1st round was mixture of aptitude and some psuedo code and the time given was 90 mins for 90 questions.

After clearing the cuttoff there will be 2 coding question one for easy level second will be medium level.

Q1. Ai based english vocabolary and listening test
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Q1. This round was the easiest of all just basic questions
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Q2. Oops related question
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Q3. Project discussion based questions.
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Q4. Do you know something about modern technologies.
Ans. 
Yes, modern technologies are constantly evolving and I keep myself updated with the latest trends.
• I am familiar with cloud computing platforms like AWS, Azure, and Google Cloud

• I have experience with containerization using Docker and Kubernetes

• I am proficient in programming languages like Python, JavaScript, and Java

• I have worked with modern front-end frameworks like React and Angular

• I am familiar with DevOps practices ...read more
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Q5. Have any questions for me.
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Technical related questions

In Ai related question

Q1. Java and Backend
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Q2. MySQL and mongodb
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Q1. What is dependency injection
Ans. 
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing and swapping of dependencies.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.
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Q2. What is solid principles
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SOLID principles are a set of five design principles that help developers create more maintainable and scalable software.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses with...read more
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Q1. What is concurrent hashmap
Ans. 
ConcurrentHashMap is a thread-safe implementation of the HashMap class in Java.
• ConcurrentHashMap allows multiple threads to read and write to the map concurrently without causing any data corruption.

• It achieves thread-safety by dividing the map into segments, each of which can be locked independently.

• ConcurrentHashMap is more efficient than using synchronized collections for concurrent access.

• Example: ConcurrentHashMap...read more
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Q2. How is dependency injection different from dependency inversion
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Dependency injection is a design pattern where dependencies are provided to a class from the outside, while dependency inversion is a principle that states high-level modules should not depend on low-level modules, but both should depend on abstractions.
• Dependency injection is a technique to achieve dependency inversion.

• Dependency injection involves providing dependencies to a class from the outside, typically through ...read more
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Q3. If I add 2 same attribute values for a object to a set...will I see 2 objects in the set, if yes what changes you make to the code to insert unique objects to a set
Ans. 
No, you will not see 2 objects in the set. To insert unique objects to a set, you can override the equals() and hashCode() methods in the object class.
• In a set, each element must be unique based on the equals() method. If you add 2 objects with the same attribute values, only one will be stored in the set.

• To ensure uniqueness, override the equals() and hashCode() methods in the object class. This will define how object...read more
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Q4. What is serialisation, externalisation, serializable
Ans. 
Serialisation is the process of converting an object into a format that can be easily stored or transmitted. Externalisation is a way to customize the serialization process. Serializable is an interface in Java that allows objects to be serialized.
• Serialisation is the process of converting an object into a format that can be easily stored or transmitted

• Externalisation is a way to customize the serialization process

• Seri...read more
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Q5. Write a Generic method to add string or integer to List or List
Ans. 
Create a generic method to add string or integer to List<Integer> or List<String>
• Create a generic method that takes a List and an element as input

• Use Java generics to specify the type of List and element

• Check the type of List and element, then add the element to the List
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General aptitude, computer science fundamentals multiple-choice questions, and data structures and algorithms multiple-choice questions were asked.

Q1. Given a string, write a function to reverse the string.
Ans. 
Function to reverse a given string
• Create an empty string to store the reversed string

• Iterate through the input string in reverse order and append each character to the new string

• Return the reversed string
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Q2. Given a sorted array of integers, write a function to perform a binary search to find the index of a target value. If the target value is not found, return -1.
Ans. 
Binary search function to find target value in sorted array
• Define function that takes sorted array and target value as input

• Initialize variables for start, end, and middle indices

• Use while loop to iterate until start is less than or equal to end
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Q1. About the company
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Q2. What are three significant achievements in your life?
Ans. 
Graduating with honors, winning a hackathon, volunteering in a developing country
• Graduated with honors from university with a degree in Computer Science

• Won first place in a hackathon competition by developing a unique and innovative software solution

• Volunteered in a developing country to help build schools and provide education to underprivileged children
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Q1. Diff. Between promise and observable
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Q2. Lifecycle hooks in angular
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Angular lifecycle hooks are methods that get called at specific stages of a component's lifecycle.
• ngOnInit() - called after the component is initialized

• ngOnChanges() - called when the component's input properties change

• ngOnDestroy() - called just before the component is destroyed

• ngAfterViewInit() - called after the component's view has been initialized

• ngAfterContentInit() - called after the component's content has been...read more
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Q3. Jwt security implementation in angular
Ans. 
Jwt security implementation in Angular
• Install angular-jwt package

• Create an auth service to handle token storage and retrieval

• Add an HttpInterceptor to attach the token to outgoing requests

• Use guards to protect routes based on authentication status
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Oops concept, basic javascript and react js coding question

Q1. React js and asp.net basic interview questions
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It will good and easy for me to attend it

Questions in collection,java 8 concepts.