Infosys Interview Questions, Process, and Tips

Print 1 to 50 odd numbers using the react hooks

Q1. What is reducer in React
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Q2. What are higher order components
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Q1. What is generator? write sample code
Ans. 
A generator in Python is a function that returns an iterator object which can be iterated over to generate values lazily.
• Generators are created using a function with 'yield' keyword instead of 'return'.

• They allow for efficient memory usage as they generate values on the fly.

• Generators are useful for generating large sequences of data without storing them in memory.

• Example: def my_generator(): for i in range(5): yiel...read more
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Q2. What is decorator?
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Decorator is a design pattern in Python that allows adding new functionality to an existing object without modifying its structure.
• Decorators are functions that take another function as an argument and extend its behavior without modifying it directly.

• They are commonly used to add logging, timing, caching, or authentication to functions.

• Decorators use the @ symbol followed by the decorator name above the function defin...read more
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Q3. Difference between list and tuple
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List is mutable, tuple is immutable in Python.
• List can be modified after creation, tuple cannot.

• List uses square brackets [], tuple uses parentheses ().

• List is used for dynamic data, tuple for fixed data.

• Example: list_example = [1, 2, 3], tuple_example = (4, 5, 6)
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Q4. What is list comprehension? write some sample code? what is use of it?
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List comprehension is a concise way to create lists in Python by iterating over an existing list or iterable.
• List comprehension is more concise and readable than traditional loops.

• It can be used to filter elements, perform operations on elements, or create new lists based on existing ones.

• Example: squares = [x**2 for x in range(10)]

• Example: even_numbers = [x for x in range(10) if x % 2 == 0]
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Q5. Write code of fibonacci series?
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Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.
• Initialize variables for the first two numbers in the series (0 and 1)

• Use a loop to calculate the next number by adding the previous two numbers

• Continue the loop until the desired number of terms is reached
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Q6. What is dictionary? is this accept duplicate or not?
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A dictionary in Python is a collection of key-value pairs. It does not accept duplicate keys.
• A dictionary is created using curly braces {}

• Keys in a dictionary must be unique, but values can be duplicated

• Example: my_dict = {'name': 'John', 'age': 30, 'city': 'New York'}
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Q7. Multiple decorator
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Q8. What are the main principles of oops?
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Main principles of OOP include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class). Example: Class with private attributes and public methods.

• Inheritance: Ability to create a new class (derived class) from an existing class (base class), inheriting its attributes and methods. Example: Subclass 'Dog' inheriting from superc...read more
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Q9. Explain type of inheritance
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Type of inheritance in object-oriented programming determines how a subclass can inherit attributes and methods from a superclass.
• Single inheritance: a subclass inherits from only one superclass.

• Multiple inheritance: a subclass inherits from multiple superclasses.

• Multilevel inheritance: a subclass inherits from a superclass, which in turn inherits from another superclass.

• Hierarchical inheritance: multiple subclasses in...read more
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Q10. What is aws lambda function
Ans. 
AWS Lambda is a serverless computing service provided by Amazon Web Services.
• Serverless computing service

• Allows running code without provisioning or managing servers

• Automatically scales based on incoming traffic

• Supports multiple programming languages like Python, Node.js, Java, etc.

• Pay only for the compute time consumed
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Q1. Tell me about yourself
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I am a seasoned Python developer with experience leading teams and delivering high-quality software solutions.
• Over 5 years of experience in Python development

• Strong leadership skills in guiding and mentoring team members

• Proven track record of delivering successful software projects on time and within budget
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Q2. Explain your project briefly
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Developed a web application for online shopping with user authentication and payment gateway integration.
• Created user registration and login functionality using Django framework

• Integrated Stripe API for secure payment processing

• Implemented product catalog and shopping cart features
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Q1. Salary discussion
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Q1. Explain the Bug Life Cycle
Ans. 
Bug Life Cycle involves stages from identification to resolution of a software bug.
• Bug identification by testers or users

• Bug logging in a bug tracking system

• Bug prioritization based on severity and impact

• Bug assignment to developers for fixing

• Bug resolution and verification

• Bug closure after confirmation of fix
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Q2. How to handle dynamic web elements
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Dynamic web elements can be handled using techniques like waiting strategies, locating elements by attributes, using XPath, and using frameworks like Selenium.
• Use explicit and implicit waits to handle dynamic loading of elements

• Locate elements by attributes that are less likely to change, such as IDs or classes

• Use XPath to locate elements based on their hierarchy or attributes

• Utilize frameworks like Selenium WebDriver
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Q3. Question on some basic coding data structures
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Q1. What are your salary expectations?
Ans. 
I am looking for a competitive salary that reflects my experience and skills in the field of automation engineering.
• Research industry standards for Senior Automation Engineer salaries

• Consider my level of experience and expertise in automation engineering

• Factor in the location and cost of living for the position

• Negotiate based on additional benefits or perks offered by the company
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Q2. Why do you want to join Infosys?
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I want to join Infosys because of its reputation for innovation, global presence, and opportunities for career growth.
• Infosys is known for its cutting-edge technology solutions and innovation in the IT industry

• I am impressed by Infosys's global presence and diverse client base

• I believe that joining Infosys will provide me with ample opportunities for career growth and development

• I am excited about the prospect of worki...read more
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Q1. What is marker interface
Ans. 
A marker interface is an interface with no methods, used to mark classes for special treatment.
• Marker interfaces do not have any methods to implement.

• They are used to add metadata to classes at runtime.

• Examples include Serializable interface in Java.

• Marker interfaces are often used for type checking or to enable special behavior.
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Q2. What difference between abstract and interface
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Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructors, fields, and non-abstract methods, while interface cannot.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract classes are used to define a common behavior for subclasses, while interfaces are used to define a contract for classes ...read more
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