Interview Questions-PHP Laravel React

Mysql acid compliance ACID is an acronym that stands for four key properties of database transactions: Atomicity Ensures that a transaction is treated as a single, indivisible unit of work Either all operations within a transaction are completed successfully, or none are If any part of the transaction fails, the entire transaction is rolled back to its previous state Prevents partial updates that could leave the database in an inconsistent state Consistency Guarantees that a transaction brings the database from one valid state to another valid state All data written to the database must adhere to defined rules, constraints, cascades, triggers, and other database integrity mechanisms Ensures that any transaction will not break the database's predefined rules Isolation Determines how and when changes made by one transaction become visible to other transactions Prevents interference between concurrent transactions MySQL provides different isolation levels: Read Uncommitted Read Commit...

Provide a good approach for the practical Oops concept.  There should be an employer add facility. Employer can have two types t1 and t2. There should be an option to calculate the tax. t1 and t2 will have different logics. What approach is good for php Oops? ----------------- Here's an object-oriented approach using Strategy Pattern for tax calculation: // Abstract base class for employers abstract class Employer {     protected $name;     protected $type;     protected $taxCalculator;     public function __construct($name, TaxCalculatorStrategy $taxCalculator) {         $this->name = $name;         $this->taxCalculator = $taxCalculator;     }     // Strategy for tax calculation     public function calculateTax($income) {         return $this->taxCalculator->calculate($income);     } } // Tax calculation strategy interface interfac...