KredX Interview Questions and Answers

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

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.

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 multiple elements.

• Event.stopPropagation() can be used to stop the...read more

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 more specific styles

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

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 DB

• Utilize caching mechanisms like Redis or Memcached to i...read more