Infosys Full Stack Software Developer Interview Questions and Answers

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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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
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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
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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
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Q2. How do you handle constructive feedback about your full-stack development projects?
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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
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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.
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HR round full stack developer experience

Best atitude round questions

Q1. Consumer producer
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Q2. Garbage collection
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Q3. Features of java 8
Ans. 
Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow for more concise code and easier parallel programming.

• Functional interfaces enable the use of lambda expressions.

• Streams provide a way to work with sequences of elements and perform operations on them.

• Default methods allow interfaces to have method implementations.

• Optional cl...read more
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Q1. What is abstract class
Ans. 
Abstract class is a class that cannot be instantiated and is used as a blueprint for other classes to inherit from.
• Cannot be instantiated directly

• Can have abstract methods that must be implemented by subclasses

• Can have non-abstract methods that can be inherited by subclasses

• Used to define common behavior for subclasses
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Q2. What are access modifier
Ans. 
Access modifiers are keywords in programming languages that define the accessibility of classes, methods, and variables.
• Access modifiers control the visibility and accessibility of classes, methods, and variables in a program.

• Common access modifiers include public, private, protected, and default (package-private).

• Public access modifier allows access from any other class.

• Private access modifier restricts access to only...read more
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Q1. Git version tool
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Q2. Project related question
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Q1. Salary expectation
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Technical related questions

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Q1. Java and Backend
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Q2. MySQL and mongodb
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