Crest Infosystems Softwaretest Engineer Interview Questions, Process, and Tips

Polymorphism in OOPs allows objects of different classes to be treated as objects of a common superclass.

• Polymorphism allows methods to be called on objects of different classes that implement the same interface or superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Animal superclass with methods like eat() and sleep(). Dog and Cat subclasses can ov...read more

MySQL injections are a type of cyber attack where malicious SQL statements are inserted into an entry field for execution.

• MySQL injections occur when an attacker inserts malicious SQL code into a query to manipulate the database.

• Attackers can use MySQL injections to access, modify, or delete data in the database.

• Preventing MySQL injections involves using parameterized queries and input validation.

• Example: SELECT * FROM...read more

Migration in Laravel is the process of managing database schema changes using PHP code.

• Migration allows developers to define database tables and their structure using PHP code instead of SQL.

• It helps in version control of database schema changes and makes it easier to collaborate with other developers.

• Migrations can be rolled back to previous states if needed, making database changes reversible.

• Example: 'php artisan ma...read more

I have integrated payment gateways like PayPal, Stripe, and Square into e-commerce websites.

• Integrated PayPal payment gateway for seamless checkout process

• Implemented Stripe API for secure credit card transactions

• Configured Square payment gateway for in-person and online payments