Infosys Full Stack Software Developer Interview Questions and Answers

It was javascript and reactjs. multiple choices and coding test

Q1. Mostly advanced javascript questions
Add your answer

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
Answered by AI
Add your answer
Q2. How is dependency injection different from dependency inversion
Ans. 
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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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 or List
• 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
Answered by AI
Add your answer

Main command on JAVA script and python

What assignments and projects you had done before share that experience

Your theories on what topics you had done your best

Q1. That some personal questions and their your preference answers that suitable for your job
Add your answer
Q2. Give us the reasons why we should not select for the job
Ans. 
Lack of relevant experience and skills
• Limited experience in full stack development

• Lack of proficiency in required programming languages and frameworks

• Inadequate knowledge of database management systems

• Weak problem-solving and analytical skills

• Poor communication and collaboration abilities
Answered by AI
View 1 more answer

Good morning sir have a you sir my name is hemant Ramchandra narkhede

Java script simple frame

Q1. What are the different data types present in javascript?
Ans. 
JavaScript has several data types including string, number, boolean, object, function, undefined, and null.
• String: 'hello', '123'

• Number: 123, 3.14

• Boolean: true, false

• Object: { key: 'value' }

• Function: function() { }

• Undefined: undefined

• Null: null
Answered by AI
Add your answer
Q2. Difference between var and let keyword in javascript.
Ans. 
var is function-scoped while let is block-scoped in JavaScript.
• var keyword is function-scoped, meaning it is accessible throughout the function it is declared in.

• let keyword is block-scoped, meaning it is only accessible within the block it is declared in.

• Using var can lead to variable hoisting issues, while let provides more predictable behavior.

• let allows for better variable scoping and reduces the risk of unintended
Answered by AI
Add your answer

Q1. What are the advantages of pair programming?
Ans. 
Pair programming promotes collaboration, knowledge sharing, and code quality.
• Enhances code quality through immediate code review and feedback

• Promotes knowledge sharing and learning from each other

• Fosters collaboration and teamwork

• Reduces the likelihood of bugs and errors

• Increases productivity by leveraging two minds on the same problem

• Helps in breaking down complex problems into smaller tasks

• Improves communication skil
Answered by AI
Add your answer
Q2. How do you handle constructive feedback about your full-stack development projects?
Add your answer

Q1. How do you identify bugs in your code?
Ans. 
I use a combination of manual testing, unit testing, and debugging tools to identify bugs in my code.
• Perform manual testing by running the code and checking for any unexpected behavior or errors.

• Write unit tests to verify the functionality of individual components and catch any issues early on.

• Utilize debugging tools like breakpoints, logging, and stack traces to track down the root cause of bugs.

• Collaborate with team ...read more
Answered by AI
Add your answer
Q2. How long have you been coding primarily in Python?
Ans. 
I have been coding primarily in Python for 5 years.
• I started learning Python in college and have been using it extensively in my professional career.

• I have worked on various projects using Python, including web development, data analysis, and automation.

• I am proficient in Python libraries such as NumPy, Pandas, and Django.
Answered by AI
Add your answer

HR round full stack developer experience

Best atitude round questions