CoffeeScript Interview Questions and Answers for internship

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100 CoffeeScript Internship Interview Questions & Answers

  1. What is CoffeeScript?

    • Answer: CoffeeScript is a programming language that compiles to JavaScript. It aims to provide a cleaner, more readable syntax while retaining the power and flexibility of JavaScript.

  2. What are the advantages of using CoffeeScript?

    • Answer: Advantages include improved code readability, reduced code verbosity, and the ability to leverage existing JavaScript libraries and frameworks.

  3. How does CoffeeScript handle indentation?

    • Answer: CoffeeScript uses indentation to define code blocks, similar to Python. Consistent indentation is crucial for correct compilation.

  4. Explain the difference between `=>` and `->` in CoffeeScript.

    • Answer: `=>` defines a fat arrow function, lexically binding `this`. `->` defines a regular function, with `this` determined by the context in which it's called.

  5. How do you define classes in CoffeeScript?

    • Answer: Classes are defined using the `class` keyword, followed by the class name and a definition block.

  6. What is the purpose of the `@` symbol in CoffeeScript?

    • Answer: The `@` symbol refers to the current instance of a class (similar to `this` in JavaScript).

  7. Explain CoffeeScript's list comprehensions.

    • Answer: List comprehensions provide a concise way to create arrays based on existing arrays, similar to Python's list comprehensions.

  8. How do you handle asynchronous operations in CoffeeScript?

    • Answer: CoffeeScript uses JavaScript's asynchronous features like promises and callbacks. Libraries like jQuery and Bluebird can simplify asynchronous operations.

  9. How do you import modules in CoffeeScript?

    • Answer: Modules can be imported using `require` similar to Node.js or CommonJS. The specifics depend on the module system being used (e.g., browserify, webpack).

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