Gartner Senior Software Engineer 1 Interview Questions and Answers

At home coding assignment was given . This was pre Gen-AI era.
A coding qn was given and it need to be properly unit tested.

Q1. A coding problem that uses recursion
Ans. 
Implementing a factorial function using recursion
• Define a function that takes an integer as input

• Base case: if input is 0, return 1

• Recursive case: return input multiplied by the factorial of input-1

• Example: factorial(5) = 5 * factorial(4) = 5 * 4 * factorial(3) = ... = 5 * 4 * 3 * 2 * 1
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Q2. Usage of git rebase
Ans. 
Git rebase is a command used to reapply commits on top of another branch.
• Git rebase is used to incorporate changes from one branch into another by reapplying commits on top of the target branch.

• It helps in maintaining a linear project history by avoiding unnecessary merge commits.

• Rebasing should be used with caution as it rewrites commit history and can cause conflicts.

• Example: git rebase master - rebase current branch...read more
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Q3. React.clone() usage
Ans. 
React.cloneElement() is used to clone and return a new React element with updated props.
• React.cloneElement() is used to clone a React element and pass new props to the cloned element.

• It is commonly used when you need to add or update props of a React element without changing its key or ref.

• Example: const element = React.cloneElement(originalElement, { newProp: value });
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Q4. Context vs Redux
Ans. 
Context is a feature in React that allows data to be passed through the component tree without having to pass props down manually. Redux is a state management library for JavaScript applications.
• Context is built into React and is primarily used for passing data through the component tree without having to pass props down manually.

• Redux is a separate library that provides a centralized store for managing application sta...read more
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Q5. Polyfill for call
Ans. 
A polyfill is a piece of code that provides the technology that you expect the browser to provide natively.
• Polyfills are used to fill in the gaps in browser support for certain features.

• They allow developers to use new features in older browsers.

• Examples of polyfills include Babel for ES6 features and HTML5 Shiv for HTML5 elements in older browsers.
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