ContactPoint 360 Interview Questions and Answers

Q1. How to read and write parquet files in pyspark?
Ans. 
Reading and writing parquet files in PySpark involves using the SparkSession API.
• Create a SparkSession object

• Read a parquet file using spark.read.parquet() method

• Write a DataFrame to a parquet file using df.write.parquet() method
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Q1. I am experienced person so I was asked the questions relevant to my role and the tools that I have used.
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Q2. Like tell about your past work experience and the tool knowledge that you have?
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Q1. OOps, C#, MVC, WEBAPI, Azure
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Q2. Multiple inheritance concept in OOPs?
Ans. 
Multiple inheritance allows a class to inherit attributes and methods from more than one parent class.
• In multiple inheritance, a class can inherit from two or more parent classes.

• It can lead to the Diamond Problem where a class inherits from two classes that have a common ancestor.

• Languages like C++ support multiple inheritance.

• Example: class ChildClass : public ParentClass1, public ParentClass2 {}
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Q3. What is interface?
Ans. 
An interface in software development defines a contract for classes to implement, specifying methods and properties that must be included.
• Interfaces in programming languages like Java, C#, and TypeScript allow for multiple inheritance by defining a set of methods that a class must implement.

• Interfaces are used to enforce a common structure across different classes, promoting code reusability and maintainability.

• Example...read more
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Create Crud operation using angular with API.