Web Digital Mantra Interview Questions and Answers

Q1. What are Artisan commands and jobs in Laravel?
Ans. 
Artisan commands are built-in command-line tools in Laravel, while jobs are tasks queued for background processing.
• Artisan commands can be created using 'php artisan make:command CommandName'.

• Common Artisan commands include 'php artisan migrate' for database migrations.

• Jobs in Laravel are created using 'php artisan make:job JobName' for handling queued tasks.

• Jobs can be dispatched using 'dispatch(new JobName())' to run...read more
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Q2. What is the method for executing an Artisan command from a controller in Laravel?
Ans. 
In Laravel, you can execute Artisan commands from a controller using the Artisan facade or the command bus.
• Using Artisan Facade: You can call Artisan commands directly using the Artisan facade. Example: `Artisan::call('command:name');`

• Passing Parameters: You can pass parameters to the command. Example: `Artisan::call('command:name', ['param' => 'value']);`

• Getting Output: To get the output of the command, use `Artisa...read more
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Q3. What is the difference between unique key and index in SQL?
Ans. 
Unique keys ensure data integrity by preventing duplicate values, while indexes improve query performance.
• A unique key constraint ensures that all values in a column are different. Example: A user email column should be unique.

• An index is a database structure that improves the speed of data retrieval operations on a database table.

• You can have multiple indexes on a table, but only one unique key constraint per column.

• U...read more
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Q4. What are traits?
Ans. 
Traits in Laravel are a mechanism for code reuse, allowing developers to include methods in multiple classes without inheritance.
• Traits allow you to group functionality in a reusable way.

• They can be used to include methods in multiple classes, avoiding code duplication.

• Example: A trait 'Loggable' can be used in multiple classes to add logging functionality.

• Traits can also contain properties, but they cannot be instanti...read more
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Q5. What is the difference between abstract class and interface?
Ans. 
Abstract classes can have both abstract and concrete methods, while interfaces can only have abstract methods.
• Abstract classes can have properties and methods with implementations, while interfaces cannot have any method implementations.

• A class can extend only one abstract class but can implement multiple interfaces.

• Abstract classes can have access modifiers (public, protected, private), whereas all methods in an inter...read more
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Orange Seller where I've to create a login system and one crud operations from where seller can add the product and change the price at any time.

Q1. He said I hope you will feel happy to work with us.
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Q2. What is the seeder. What is the purpose of this one.
Ans. 
Seeder is a Laravel feature that allows populating database tables with dummy data.
• Seeder is used to fill the database with test data.

• It is helpful for testing and development purposes.

• Seeder can be used to generate random data for tables.

• It can also be used to create relationships between tables.

• Seeder files are stored in the database/seeds directory.
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