Eficaz Consultants Interview Questions and Answers

Coalesce reduces the number of partitions in a DataFrame, while repartition increases the number of partitions.

• Coalesce is used to reduce the number of partitions in a DataFrame without shuffling the data

• Repartition is used to increase the number of partitions in a DataFrame and can involve shuffling the data

• Coalesce is more efficient than repartition when reducing partitions as it avoids shuffling

React Js allows for efficient and reusable UI components, virtual DOM for faster rendering, and easy integration with other libraries.

• Efficient and reusable UI components make development faster and easier.

• Virtual DOM allows for faster rendering by only updating the parts of the DOM that have changed.

• Easy integration with other libraries like Redux for state management.

• React Native allows for building mobile apps using

Functions return a single value while stored procedures can perform multiple operations and return multiple values.

• Functions return a single value while stored procedures can return multiple values.

• Functions are used for computations and return values, while stored procedures are used for executing a series of statements.

• Functions can be called from within SQL statements, while stored procedures are called using the EX...read more

Abstract class can have implementation details, while interface only contains method signatures.

• Abstract class can have constructors, fields, and methods with implementation details, while interface can only have method signatures.

• A class can inherit from only one abstract class, but can implement multiple interfaces.

• Abstract classes are used when some common functionality needs to be shared among multiple classes, whi...read more

Outsourcing is the practice of contracting out certain business functions or processes to third-party providers.

• Outsourcing can help companies reduce costs by hiring external vendors to handle tasks such as customer service, IT support, or manufacturing.

• Companies may outsource to take advantage of specialized skills or resources that they do not have in-house.

• Offshore outsourcing involves contracting with companies in ...read more