ITC Infotech QA Tester Interview Questions and Answers

Repartition increases or decreases the number of partitions in a DataFrame, while coalesce only decreases the number of partitions.

• Repartition shuffles the data across the network, while coalesce does not.

• Repartition can be used to increase parallelism, while coalesce is used to reduce it.

• Repartition can result in uneven partition sizes, while coalesce always results in equal or smaller partition sizes.

Generator produces values on the fly while iterator returns values from a collection.

• Generators use 'yield' keyword to produce values one at a time.

• Iterators use 'next()' method to return the next value in a collection.

• Generators can be infinite while iterators are finite.

• Generators are memory efficient while iterators may require more memory.

• Example of generator: function* myGenerator() { yield 1; yield 2; }

• Example of...read more

HANA is an in-memory database and application development platform developed by SAP.

• HANA stands for High-Performance Analytic Appliance.

• It allows real-time processing of large amounts of data.

• It can be used for data warehousing, analytics, and application development.

• HANA is used by businesses to gain insights from their data and make better decisions.

• Examples of companies using HANA include Coca-Cola, Nestle, and Merc

C is a general-purpose programming language known for its efficiency and low-level memory manipulation capabilities.

• C was developed by Dennis Ritchie at Bell Labs in 1972.

• It is widely used for system programming, embedded systems, and developing operating systems.

• C is a compiled language and is known for its speed and efficiency.

• It has influenced many other programming languages, including C++, Java, and Python.

• Some po...read more