PHP, Laravel and SQL Online Test

Consider the following PHP pseudo code:

The processArray function processes the $data array based on the transformation operations defined in the $operations array. The operations array dictates which transformation function to call for each sub-array key. What will be the output of the above code?

What does the following code output?

What does the following code output?

Consider the following table data and PHP code. What is the result?

Consider the following PHP script:

Assuming you run the script twice in a row without clearing the session data, what will be the output on the second run?

You are developing a Laravel application that has a PostController for managing blog posts. The routes for this controller are set up as a resource route in your web.php file:

You have already created a middleware called EnsureAdminRole to restrict access to certain routes for admin users. Now, you want to apply this middleware to the create, edit, update, and delete routes for the PostController, but not the index or show routes.

Which of the following ways would correctly apply the EnsureAdminRole middleware to these routes?

In your Laravel application, you are implementing a registration form where users enter their birthdate as a string in the 'Y-m-d' format. You want to ensure that only users aged 18 years or older can register. To achieve this, you decide to write a custom validation rule. Consider the following implementation of the custom rule and a function to handle the registration request:

Which of the following code snippets correctly fills the passes method in the AgeRestriction class to ensure that only users aged 18 or older can register, given that the birthdate is a string in the 'Y-m-d' format?

Consider the following code snippet in a Laravel application:

Assume the user 'John Doe' is the first user in the User table. You want to retrieve all comments belonging to a post made by this user ('John Doe'). Which of the following Eloquent expressions is the correct way to achieve this?

In your Laravel application, you're making use of route model binding to handle retrieving models based on the incoming request. You have a route defined as follows:

In your PostController, the show method looks like this:

Now, imagine that instead of using the ID, you want to retrieve posts by their 'slug' for SEO purposes. Which of the following changes should you make in order to achieve this?

A: Modify the route to Route::get('/posts/{slug}', 'PostController@show'); and change the show method to public function show($slug).
B: Modify the getRouteKeyName method in the Post model to return 'slug'.
C: Change the show method to public function show(Post $slug).
D: No changes are needed, Laravel will automatically use the 'slug' if it exists.

In a Laravel application, the Service Container is a powerful tool for managing class dependencies and performing dependency injection. You're building a payment feature and created an interface PaymentGatewayInterface and two concrete classes, StripePaymentGateway and PaypalPaymentGateway, which implement this interface.

The application should use StripePaymentGateway for users located in the US, and PaypalPaymentGateway for users located in Europe.

Which of the following approach would you use to register these bindings in the Service Container?

A: Use App::bind(PaymentGatewayInterface::class, StripePaymentGateway::class) for US users and App::bind(PaymentGatewayInterface::class, PaypalPaymentGateway::class) for European users.

B: Use App::singleton(PaymentGatewayInterface::class, StripePaymentGateway::class) for US users and App::singleton(PaymentGatewayInterface::class, PaypalPaymentGateway::class) for European users.

C: Use a conditional statement within the binding closure of App::bind to check the user's location and bind the appropriate concrete class.

D: Use App::instance(PaymentGatewayInterface::class, new StripePaymentGateway) for US users and App::instance(PaymentGatewayInterface::class, new PaypalPaymentGateway) for European users.

E: Use App::when('App\\Http\\Controllers\\PaymentController')->needs(PaymentGatewayInterface::class)->give(StripePaymentGateway::class) for US users and the same method with PaypalPaymentGateway::class for European users.

Consider the following SQL table:

How many rows does the following SQL query return?

Consider the following SQL table:

Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?

Consider the following SQL table:

Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?

Consider the following SQL table:

What will be the first two tuples resulting from the following SQL command?

Consider the following SQL table:

How many tuples does the following query return?

We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.

For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.

⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 

Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 

⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.