Shell Recharge Solutions Softwaretest Engineer Interview Questions and Answers

Experienced with Java, Python, SQL, HTML, CSS, JavaScript, and Git.

• Java

• Python

• SQL

• HTML

• CSS

• JavaScript

• Git

Drop deletes the table and its data while truncate deletes only the data.

• Drop is a DDL command while truncate is a DML command.

• Drop is irreversible while truncate can be rolled back.

• Drop releases the storage space while truncate does not.

• Drop requires the user to have the DROP privilege while truncate requires the user to have the ALTER privilege.

• Example: DROP TABLE table_name; TRUNCATE TABLE table_name;

Static keyword is used in programming to declare variables, methods, or classes that belong to the class itself rather than instances of the class.

• Static variables are shared among all instances of a class

• Static methods can be called without creating an instance of the class

• Static classes cannot be instantiated and are used for grouping related methods or constants

• Static keyword is also used in C to declare functions t

OOPs concepts are fundamental principles in object-oriented programming, including inheritance, encapsulation, polymorphism, and abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex imple...read more