Chubb Interview Questions and Answers for Freshers

Props are used to pass data from parent to child components, while events are actions that occur in the application.

• Props are read-only and help in maintaining the unidirectional data flow in React

• Events are actions like onClick, onChange, etc. that are triggered by user interactions

• Example: Passing a 'name' prop from a parent component to a child component and triggering an onClick event to update state

To find the binary representation of a number, convert the number to binary by dividing it by 2 and keeping track of the remainders.

• Start by dividing the number by 2 and noting the remainder

• Continue dividing the quotient by 2 until the quotient is 0

• Write down the remainders in reverse order to get the binary representation

• For example, the binary representation of 10 is 1010 (10 divided by 2 is 5 with a remainder of 0, then 2 with a remainder of 1, then 1 with a remainder of 0...read more

Abstraction in Java is the concept of hiding the implementation details and showing only the necessary features of an object.

• Abstraction allows you to define a template for a class without providing the implementation details.

• It helps in reducing complexity by hiding unnecessary details and only showing the essential parts.

• Abstract classes and interfaces are used to achieve abstraction in Java.

Optimal approach for checking if a number is prime or not using DSA

• Optimal approach for checking prime numbers is to iterate up to square root of the number

• Use trial division method to check divisibility by numbers up to square root of the number

• Time complexity of this approach is O(sqrt(n))

A class is a blueprint for creating objects, which are instances of the class. Objects have attributes and behaviors.

• Classes define the structure and behavior of objects.

• Objects are instances of classes and have their own unique attributes and behaviors.

• Example: Class 'Car' with attributes like 'color' and behaviors like 'drive'. Object 'myCar' is an instance of 'Car' with color 'red' and can drive.

• Example: Class 'Person' with attributes like 'name' and behaviors like 'eat'. ...read more

SQL normal forms are levels of organization for relational databases to reduce redundancy and improve data integrity.

• First normal form (1NF) - Eliminate repeating groups and ensure each column contains atomic values.

• Second normal form (2NF) - Meet 1NF requirements and have all non-key attributes fully functionally dependent on the primary key.

• Third normal form (3NF) - Meet 2NF requirements and have no transitive dependencies between non-key attributes.

• Boyce-Codd normal form (...read more