IQVIA Senior Data Warehouse Developer Interview Questions and Answers

Oops concepts in Java

• Encapsulation - hiding implementation details

• Inheritance - reusing code and creating parent-child relationships

• Polymorphism - multiple forms of a method or object

• Abstraction - creating abstract classes and interfaces

• Example: Encapsulation - using private variables and public methods

• Example: Inheritance - creating a subclass that inherits from a superclass

• Example: Polymorphism - using method overloa...read more

Altering columns in databases involves modifying the structure of a table by adding, deleting or modifying columns.

• Use ALTER TABLE statement to modify columns

• Add new columns using ADD COLUMN

• Delete columns using DROP COLUMN

• Modify columns using MODIFY COLUMN

• Changing column data type may result in data loss

Reversing a number in Java

• Convert the number to a string

• Use StringBuilder to reverse the string

• Convert the reversed string back to a number

To extract words from a line in Java, split the line using whitespace as delimiter.

• Use the split() method of String class

• Pass the whitespace regex as argument to split() method

• Iterate over the resulting array to get individual words

Generic collections provide type safety and reusability in software development.

• Generic collections allow us to store and manipulate objects of any type in a type-safe manner.

• They provide compile-time type checking, reducing the chances of runtime errors.

• They promote code reusability by allowing the same collection to be used with different types.

• Generic collections improve performance by eliminating the need for boxin...read more

I am a passionate software developer with 5 years of experience in web development and a strong background in computer science.

• 5 years of experience in web development

• Strong background in computer science

• Passionate about software development

To separate personal and professional calls, and to ensure availability and accessibility.

• Separate personal and professional calls

• Ensure availability and accessibility

• Maintain work-life balance

• Avoid mixing personal and work-related contacts

Developed a Btech project on automated attendance system using facial recognition.

• Developed a software application to automate the attendance process in educational institutions.

• Implemented facial recognition technology to identify and mark attendance of students.

• Used machine learning algorithms to train the system for accurate recognition.

• Integrated the application with a database to store attendance records.

• Provided ...read more

Code Pascal's Triangle

• Pascal's Triangle is a triangular array of binomial coefficients

• Each number is the sum of the two numbers above it

• The first and last numbers in each row are 1

• Can be implemented using nested loops or recursion

An abstract function is a function that has no implementation and must be implemented by its subclasses.

• An abstract function is declared with the 'abstract' keyword.

• It is used to define a template for its subclasses to follow.

• It cannot be instantiated and must be implemented by its subclasses.

• It can have abstract and non-abstract methods.

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

• Example: class Dog ex...read more

Abstract functions cannot be instantiated and must be implemented by child classes, while normal functions can be directly called.

• Abstract functions have no implementation in the parent class, while normal functions do.

• Abstract functions are declared with the 'abstract' keyword, while normal functions are not.

• Normal functions can be called directly, while abstract functions must be implemented by child classes.

• An examp...read more

Perfectionism and public speaking anxiety

• I tend to be a perfectionist, which can sometimes lead to spending too much time on a task

• I struggle with public speaking anxiety, but I have been working on improving my communication skills through practice and training

Capgemini is a global leader in consulting, technology services, and digital transformation.

• Capgemini has a strong reputation in the industry for delivering high-quality software solutions.

• The company offers a wide range of opportunities for career growth and development.

• Capgemini has a collaborative and inclusive work culture that fosters innovation and teamwork.

• The company has a global presence, providing exposure to...read more