AVEVA SDE-2 Interview Questions and Answers

Q1. What is React Context?
Ans. 
React Context is a feature in React that allows data to be passed down the component tree without having to pass props manually.
• Context provides a way to share values like themes, user data, etc. across the component tree.

• It avoids prop drilling, where props are passed down multiple levels to reach a component that needs them.

• Context consists of two parts: a Provider component that provides the data and a Consumer comp...read more
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Q2. What is meant by closure in javascript?
Ans. 
Closure is a function that has access to its parent scope, even after the parent function has closed.
• Closure is created when a function is defined inside another function.

• The inner function has access to the outer function's variables and parameters.

• The outer function returns the inner function, which can be called later with the parent scope still accessible.

• Closures are used for data privacy, event handlers, and call
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Q3. What are the complicated tasks you've done exceeding everyone's expectation?
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Q4. Algorithm to convert roman numeral to numbers?
Ans. 
Algorithm to convert roman numeral to numbers
• Create a dictionary to map roman numerals to their corresponding values

• Iterate through the roman numeral string from right to left

• If the current value is less than the previous value, subtract it from the total

• If the current value is greater than or equal to the previous value, add it to the total

• Return the total
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Q1. What is React context?
Ans. 
React context is a way to pass data through the component tree without having to pass props down manually at every level.
• Context provides a way to share values like a theme or user data across the component tree.

• It avoids prop drilling and makes the code cleaner and more maintainable.

• Context consists of two parts: a Provider component that provides the data and a Consumer component that consumes the data.

• Context can be...read more
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Q2. What is abstract class in javascript?
Ans. 
There is no abstract class in JavaScript.
• JavaScript does not have a built-in abstract class concept.

• However, it is possible to create abstract classes using functions and prototypes.

• Abstract classes are used as blueprints for other classes to inherit from.

• They cannot be instantiated on their own and must be extended by a subclass.

• Abstract methods can be defined in the abstract class and must be implemented in the subcl
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Q3. What is meant by function overloading and function overriding?
Ans. 
Function overloading is when multiple functions have the same name but different parameters. Function overriding is when a subclass provides its own implementation of a method that is already present in the parent class.
• Function overloading is used to provide multiple ways to call a function with different parameters.

• Function overriding is used to provide a specific implementation of a method in a subclass.

• Function ove...read more
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Q4. Implement counter in react app
Ans. 
Implement a counter in a React app
• Create a state variable to hold the count

• Render the count in the UI

• Add buttons to increment and decrement the count

• Update the state variable on button click
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Aptitude and coding round, one coding question and others are computer fundamentals

Q1. Return true if Subarray is present whose sum is 0
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Q2. Project, oops, dbms
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Q1. Subarray sun equal to k
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Q2. Project, oops, dbms
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Q1. Did not got slected i answered all still
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Q1. Work Experience?
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Q2. Questions Regarding CV ?
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Q3. Question on Xpath (Selenium)
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Q4. Questions on Python basic coding
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Q5. Questions on API Testing
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Q1) Write a functions to perform all CRUD in api.
Q2) Given two sorted list
ar1 =[1,2,3,4,7,7,12,18,19]
ar2 = [3, 4, 7, 7,14, 18, 19]

You can add and find largest sum but you can switch when ar1 and ar2 have same numbers.

Solution: you can base your solution on merge algo and recursively call your function to return largest sum possible.

Q1. Git workflow and xpath. Reverse a string
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Q1. Intro of yourself
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Frequency array, java collection, missing number

General Aptitude test was conducted

Q1. String related problem and code the solution. Some Mongodb questions
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Q1. OOPS concept, testing methods and other QA related questions
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Q1. Test Scenarios discussion, Selenium basics and database problems
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Q1. In depth technical discussion of current projects
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Q1. Cultural fitment round and basic personal questions
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Q1. Why strings are immutable
Ans. 
Strings are immutable to ensure data integrity and prevent unintended changes.
• Immutable strings allow for safer multithreading and concurrency.

• String interning is possible because of immutability.

• Immutable strings can be used as keys in dictionaries and hash tables.

• Examples of immutable data types include numbers and tuples.
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