LARAVEL LARAVEL Eloquent ORM & Database

Question 1

What class must a Laravel Eloquent model extend?

Accepted Answer

Illuminate\Database\Eloquent\Model

Answer

Illuminate\Database\Query\Builder

Answer

Illuminate\Database\Eloquent\Collection

Answer

Illuminate\Support\Facades\DB

Question 2

Which Eloquent method retrieves all records from a database table?

Accepted Answer

Model::all()

Answer

Model::get()

Answer

Model::fetch()

Answer

Model::list()

Question 3

What is the purpose of the `$fillable` property in an Eloquent model?

Accepted Answer

To whitelist attributes that are mass-assignable

Answer

To list columns that should be hidden from JSON output

Answer

To define the primary key columns

Answer

To specify columns that trigger model events

Question 4

Which Eloquent method finds a model by its primary key and throws an exception if not found?

Accepted Answer

findOrFail()

Answer

find()

Answer

firstOrFail()

Answer

getOrFail()

Question 5

How do you define a one-to-many relationship in Eloquent from the parent model?

Accepted Answer

public function children() { return $this->hasMany(Child::class); }

Answer

public function children() { return $this->belongsToMany(Child::class); }

Answer

public function children() { return $this->hasOne(Child::class); }

Answer

public function children() { return $this->manyTo(Child::class); }

Question 6

What does eager loading with `with()` prevent in Laravel?

Accepted Answer

The N+1 query problem

Answer

SQL injection attacks

Answer

Duplicate model instances

Answer

Cross-database queries