ITCS Interview Questions and Answers

JSP does not have any implicit methods, but it has implicit objects.

• JSP has implicit objects like request, response, session, application, pageContext, out, config, and exception.

• These objects are automatically available in JSP pages without any declaration or initialization.

• They can be used to perform various operations like accessing request parameters, setting session attributes, etc.

Method overloading is having multiple methods with the same name but different parameters, while method overriding is having a subclass method with the same name and parameters as a superclass method.

• Method overloading is resolved at compile-time based on the number and type of arguments passed

• Method overriding is resolved at runtime based on the actual object type

• Method overloading is used to provide different wa...read more

Testing is the process of evaluating a system or its component(s) with the intent to find whether it satisfies the specified requirements or not.

• Testing is done to identify defects or errors in the system

• It helps in improving the quality of the system

• Testing can be done at different levels such as unit testing, integration testing, system testing, and acceptance testing

• Automated testing is becoming more popular du...read more

OOPs is a programming paradigm based on the concept of objects.

• Encapsulation - bundling of data and methods that act on that data

• Inheritance - ability of a class to inherit properties and methods from a parent class

• Polymorphism - ability of objects to take on many forms

• Abstraction - hiding of complex implementation details from the user

Abstract is a keyword in Java used to create abstract classes and methods.

• Abstract classes cannot be instantiated

• Abstract methods do not have a body and must be implemented by the subclass

• Abstract classes can have both abstract and non-abstract methods

• Abstract classes are used to provide a common interface for its subclasses

• Example: abstract class Animal { abstract void makeSound(); }

An SQL UPDATE query modifies existing records in a database table based on specified conditions.

• Syntax: UPDATE table_name SET column1 = value1, column2 = value2 WHERE condition;

• Example: UPDATE employees SET salary = 50000 WHERE id = 1;

• Use WHERE clause to specify which records to update; otherwise, all records will be updated.

• You can update multiple columns in a single query.

• Example: UPDATE products SET price = 20,...read more