Snapdeal Interview Questions, Process, and Tips

Q1. What is bind in javascript and write its polyfill
Ans. 
Bind creates a new function with a specified 'this' value and arguments.
• Bind returns a new function with the same body as the original function.

• The 'this' value of the new function is bound to the first argument passed to bind().

• The subsequent arguments are passed as arguments to the new function.

• Polyfill for bind() can be created using call() or apply() methods.
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Q2. Output questions related to hoisting and closures.
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Q3. What is event bubbling, event capturing and its use?
Ans. 
Event bubbling and event capturing are two mechanisms in JavaScript that describe the order in which events are handled.
• Event bubbling is the process where an event is first captured by the innermost element and then propagated to its parent elements.

• Event capturing is the opposite process where an event is first captured by the outermost element and then propagated to its child elements.

• Event bubbling is the default b...read more
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Q4. What is the difference between async and defer
Ans. 
async loads script while page continues to load, defer loads script after page has loaded
• async loads scripts asynchronously while page continues to load

• defer loads scripts after the page has loaded

• async scripts may not execute in order, while defer scripts do

• async scripts may cause rendering issues, while defer scripts do not
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Q5. Explain box model in css, and what is specificity in CSS. What are render-blocking statements?
Ans. 
Box model defines how elements are rendered in CSS. Specificity determines which CSS rule applies to an element. Render-blocking statements delay page rendering.
• Box model includes content, padding, border, and margin.

• Specificity is calculated based on the number of selectors and their types.

• Render-blocking statements are CSS or JavaScript files that prevent the page from rendering until they are loaded.

• Use media querie...read more
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Q6. Tell about Saas( Syntactically Awesome Style Sheets)
Ans. 
Saas is a CSS preprocessor that extends the functionality of CSS with variables, mixins, and more.
• Saas stands for Syntactically Awesome Style Sheets

• It allows for the use of variables, mixins, and functions in CSS

• Saas code must be compiled into CSS before it can be used in a web page

• Saas is often used in conjunction with build tools like Gulp or Webpack
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Q1. Write code to find if two objects are equal or not in javascript
Ans. 
Code to check equality of two objects in JavaScript
• Use the JSON.stringify() method to convert the objects into strings

• Compare the string representations of the objects using the === operator

• If the strings are equal, the objects are considered equal
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Q2. Write a code to find if the input date is today or tomorrow based on the current date. If it's not today or tomorrow, output the no of days difference between the input date and the current date.
Ans. 
Code to find if input date is today/tomorrow or no of days difference from current date.
• Get current date using Date() constructor

• Convert input date to Date object

• Compare input date with current date to check if it's today/tomorrow

• If not, calculate the difference in days using getTime() method

• Output the result accordingly
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Q3. Some output questions based on promises.
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Q4. How will you implement infinite scrolling in react js?
Ans. 
Implement infinite scrolling in React JS using Intersection Observer API.
• Use Intersection Observer API to detect when the user has scrolled to the bottom of the page.

• Fetch new data and append it to the existing data using setState.

• Use a loading spinner to indicate that new data is being fetched.

• Add a debounce function to prevent multiple API calls while scrolling.

• Use a key prop when rendering the list of data to avoid
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Q1. Simple groupby questions in pandas?
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Q2. Group by questions in SQL?
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Q1. Why you want to do this job?
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Q2. What was your yesterday's schedule?
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Q3. What is your short term goal?
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Reverse a stack without using extra space

Q1. Convert Roman to Integer
Ans. 
Convert Roman numerals to integers using a mapping of values for each symbol.
• Create a mapping of Roman numeral symbols to their corresponding integer values.

• Iterate through the input Roman numeral string from right to left.

• If the current symbol's value is less than the next symbol's value, subtract it from the total. Otherwise, add it to the total.
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Q2. Mid of linked list
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