TailNode Interview Questions and Answers

An UI for provided and you needed to create a react application of that.

Q1. Basic concepts of JavaScript, Reacts and CSS
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Q2. A DSA based problem was given
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HTML, CSS, Javascript

Q1. Selectors in css?
Ans. 
Selectors in CSS are patterns used to select and style HTML elements.
• Selectors are used to target specific elements in an HTML document

• There are different types of selectors like element selectors, class selectors, ID selectors, etc.

• Selectors can be combined to create complex selectors

• Examples: 'h1' selects all h1 elements, '.class' selects elements with a specific class, '#id' selects elements with a specific ID
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Q2. Psuedo classes in css?
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Pseudo classes in CSS are used to select and style elements based on their state or position in the document.
• Pseudo classes start with a colon (:) followed by the name of the pseudo class

• Common pseudo classes include :hover, :active, :focus, :first-child, :last-child

• Pseudo classes can be used to style links, form elements, and other interactive elements

• Pseudo classes can also be combined with other selectors to create ...read more
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Q3. What is event bubbling?
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Event bubbling is the process in which an event triggered on a nested element is also triggered on its parent elements.
• Events in JavaScript propagate from the innermost element to the outermost element.

• During event bubbling, the event is first handled by the innermost element and then propagated to its parent elements.

• This allows for event delegation, where a single event handler can be used to handle events on multipl...read more
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Q4. Count the number of words in given strings of array using higher order function?
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Count the number of words in given strings of array using higher order function.
• Use the map function to transform each string into an array of words

• Use the reduce function to count the total number of words in all strings

• Handle edge cases such as empty strings or strings with leading/trailing spaces
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Q5. Fetch the API with proper error handling and async await?
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To fetch an API with proper error handling and async await, use try-catch block and await keyword.
• Use the fetch() function to make the API request.

• Wrap the fetch() call in a try-catch block to handle errors.

• Use the await keyword before the fetch() call to wait for the response.

• Check the response status code to handle different scenarios.

• Handle any errors or exceptions that may occur during the API request.
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Q1. About previous job roles and impact
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Q1. How to talk to tech team, case study
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Q1. With the head of product, case study and more
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I was given two sum problem and was asked about NodeJs working

Q1. How will u get employees where u have to take data from another collection or table and join them on basis of ids to get their details?
Ans. 
Use SQL queries to join tables based on IDs to retrieve employee details.
• Use SQL JOIN statement to combine data from multiple tables based on a related column (e.g. employee ID).

• Identify the common column (ID) in both tables to establish the relationship.

• Select the columns you want to retrieve from both tables in the SELECT statement.

• Use INNER JOIN, LEFT JOIN, RIGHT JOIN, or FULL JOIN based on the requirement of includ...read more
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Q2. How will scale the above problem on basis of using different DB or or caching storage mechanism?
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Scaling the problem using different DB or caching storage mechanism involves evaluating performance requirements, data structure, and access patterns.
• Evaluate performance requirements to determine if a different DB or caching storage mechanism is necessary

• Consider the data structure and access patterns to choose the most suitable storage solution

• Implement sharding or partitioning for horizontal scaling with a different...read more
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Q1. Past experiences.
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Q2. How would tackle difficult to communicate effectively while making your point.
Ans. 
I would use clear and concise language, provide examples, and actively listen to ensure understanding.
• Use clear and concise language to avoid confusion

• Provide examples to illustrate your point

• Actively listen to ensure understanding and address any confusion
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Q1. Survey type question on ground survey.
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