ServiceNow Data Engineer Interview Questions and Answers for Experienced

OOPs concepts are the fundamental principles of object-oriented programming.

• Encapsulation - binding data and functions that manipulate the data

• Inheritance - creating new classes from existing ones

• Polymorphism - ability of objects to take on many forms

• Abstraction - hiding implementation details and showing only functionality

Storage classes in C define the scope and lifetime of variables.

• There are four storage classes in C: auto, register, static, and extern.

• Auto variables are local to a block and have automatic storage duration.

• Register variables are stored in CPU registers for faster access.

• Static variables have a lifetime throughout the program and are initialized only once.

• Extern variables are declared outside any function and can be a

Data is a collection of facts, figures, or statistics that can be analyzed to gain insights and make informed decisions.

• Data can be structured or unstructured

• Data can be qualitative or quantitative

• Examples of data include customer demographics, sales figures, and website traffic

• Data can be analyzed using various tools and techniques to extract meaningful insights