Beam Tech Interview - Bruno.

general.md

Below are general senior level full stack developer Q&As.

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1. GraphQL vs RESTful

List some issues within RESTful APIs that GraphQL attempts to solve.

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2. Dont't Repeat Yourself.

Write a snippet of code violating the Don't Repeat Yourself (DRY) principle. Then, fix it. Use any language.

// past your code here

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3. Inheritance vs Composition.

Many state that, in Object-Oriented Programming, composition is often a better option than inheritance. What's you opinion?

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4. Test Driven Development

How do tests and TDD influence code design?

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5. Statelessness

Why is developing a backend service (e.g. a Laravel API) as a stateless servie so important? What's the advantages of stateless code?

javascript.md

Below are senior level frontend javascript developer Q&As.

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1. ES6 functional javascript code

Below is an array of people and their pets, along with an array of pet IDs. Write some code that takes two inputs: people and petIds and returns the original people array and for each matching pet id insert a property { species: 'cat' } into matching pet object.

e.g. { id: '2', name: 'Rolf', species: 'cat' }

Demonstrate your most expressive, clean, testable and ES6 compatible code

const petIds = ['2','3','5'];

const people = [
  {
    id: '1',
    name: 'Jill',
    sex: 'female',
    age: 32,
    pets: [
      { id: '1', name: 'Kitty'},
      { id: '2', name: 'Rolf'}
    ]
  },
  {
    id: '2',
    name: 'Sam',
    sex: 'male',
    age: 16,
    pets: [
      { id: '3', name: 'Pretty boy'}
    ]
  },
  {
    id: '4',
    name: 'Pete',
    sex: 'male',
    age: 33,
    pets: [
      { id: '4', name: 'Misty'},
      { id: '5', name: 'Milo'}
    ]
  },
  {
    id: '5',
    name: 'Jess',
    sex: 'female',
    age: 21,
    pets: []
  }  
]

// paste your code here

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2. Dependencies

Define NPM, Yarn and the difference between the two.

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3. Variable scope

What is the purpose of let keyword in javascript?

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4. Statless components

Explain the reasoning behind a stateless component along with a small code example. Use React or Vue.

// past your code here

php.md

Below are PHP / Laravel senior level full stack developer Q&As.

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1. Writing clean and testable code

Rewrite the class below to be more testable and clean

class User
{
    public static function getUsersByAge(int $age): ?Collection
    {
        $users = DB::table('users')
            ->where('age', $age)
            ->get();

        if ($users->count() > 0) {
            return $users;
        }

        return null;
    }
}

// paste your code here

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2. Redis

What are the advantages of using Redis as the cache and queue drivers over the php array driver?

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3. Eloquent and the database

Explain the differences between eager loading and lazy loading in eloquent models.

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4. Modern PHP

What is your favourite language feature introduced in PHP 7.4? Why do you like it? What advantages does it offer?