KPMG India Pyspark Developer Interview Questions and Answers

Q1. Basics of Python, Flask, ReactJs, RestApi Development
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Q2. Python - Difference between is and ==
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Q3. React - useEffect vs useState
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Q4. Authentication in RestApi
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Q5. React - Pure Component and Higher order components
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25 Questions, Multiple choice, Single correct as well as multi-correct, related tp python, django & flask

Find the maximum occurring number in a list of numbers without using any in-built functions, in linear time using, O(1) space

Q1. Difference between Lists and Tuples?
Ans. 
Lists are mutable, ordered collections of items while tuples are immutable, ordered collections of items.
• Lists are defined using square brackets [] while tuples are defined using parentheses ().

• Lists can be modified (add, remove, change elements) while tuples cannot be modified once created.

• Lists are typically used for collections of similar items that may need to be modified, while tuples are used for fixed collection...read more
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Q2. Difference between Shallow copy and Deep copy?
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Shallow copy creates a new object but does not duplicate nested objects, while deep copy creates a new object with all nested objects duplicated.
• Shallow copy only copies the references of nested objects, not the objects themselves.

• Deep copy creates new copies of all nested objects, ensuring complete independence.

• In Python, shallow copy can be achieved using the copy() method, while deep copy can be achieved using the d
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Q3. What is MVT architecture?
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MVT architecture stands for Model-View-Template architecture, commonly used in web development with Django framework.
• MVT separates the logic of an application into three components: Model, View, and Template.

• Model represents the data structure, View handles the user interface and business logic, and Template manages the presentation layer.

• MVT is similar to MVC (Model-View-Controller) architecture but with a different n...read more
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Q4. What are decorators in Python?
Ans. 
Decorators in Python are functions that modify the behavior of other functions or methods.
• Decorators are denoted by the @ symbol followed by the decorator name.

• They allow you to wrap another function in order to extend or modify its behavior.

• Decorators are commonly used for logging, authentication, and memoization.

• Example: @staticmethod decorator in Python is used to define a method that is not bound to an instance of
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Q5. Difference between static and instance methods in python? Explain what decorator to use for defining static methods?
Ans. 
Static methods are bound to the class itself, while instance methods are bound to instances of the class. Use @staticmethod decorator for static methods.
• Static methods do not have access to class or instance attributes, while instance methods do.

• Instance methods can modify instance state, while static methods cannot.

• To define a static method in Python, use the @staticmethod decorator before the method definition.

• Exampl...read more
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Q6. What is inheritence? How many types of inheritence are there in python?
Ans. 
Inheritance is a mechanism in which a new class inherits attributes and methods from an existing class.
• Inheritance allows a class to reuse code from another class.

• Python supports single, multiple, and multilevel inheritance.

• Example: class ChildClass(ParentClass):
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Q7. What are access specifiers in Python, how are they set-up?
Ans. 
Access specifiers in Python control the accessibility of class attributes and methods.
• Access specifiers are not explicitly defined in Python like in other languages such as Java or C++.

• By convention, attributes and methods starting with a single underscore (_) are considered 'protected' and should not be accessed directly.

• Attributes and methods starting with double underscores (__) are considered 'private' and are name
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Q1. When you want delete account accosiated with contact. The account should not get deleted.
Ans. 
To delete an account associated with a contact without deleting the account itself.
• Remove the contact's association with the account before deleting the contact.

• Check for any other dependencies before deleting the contact.

• Consider creating a custom field to track the association between the contact and account.
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Q2. Do have experience in flows, Explain the flows
Ans. 
Flows are declarative automation tools in Salesforce used to automate business processes by collecting data and performing operations.
• Flows are created using a visual designer in Salesforce.

• They can automate complex business processes without writing code.

• Flows can collect data from users, interact with Salesforce, and make decisions based on user input or data.

• They can be triggered by various events like record change...read more
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Q1. When rating is hot update description
Ans. 
When a rating is hot, update the description accordingly.
• Monitor user feedback and ratings regularly

• Update the description based on the latest ratings and reviews

• Consider adding specific details or addressing common concerns mentioned in the feedback
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Q2. Tell me about yourself
Ans. 
I am a Salesforce Developer with 5 years of experience in designing and implementing custom solutions for clients.
• 5 years of experience in Salesforce development

• Strong expertise in designing and implementing custom solutions

• Proficient in Apex, Visualforce, and Lightning components

• Certified Salesforce Developer

• Experience working with clients to understand their requirements and deliver solutions
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Q1. Asked me about the projects I have worked on?
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Q2. Asked me about the Jetpack in Android like MVVM, LiveData, Room DB.
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Q1. What is trigger in salesforce
Ans. 
A trigger in Salesforce is a piece of code that is executed before or after specific data manipulation events, such as insert, update, or delete.
• Triggers are used to perform custom actions on records in Salesforce.

• Triggers can be written in Apex programming language.

• Triggers can be executed before or after specific events like insert, update, or delete.

• Triggers are associated with a specific object in Salesforce.

• Exampl...read more
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Q2. Type of flows in salesforce
Ans. 
There are three types of flows in Salesforce: Autolaunched Flows, Screen Flows, and Scheduled Flows.
• Autolaunched Flows are triggered by a process or Apex trigger and do not require user interaction.

• Screen Flows guide users through a series of screens to collect and display information.

• Scheduled Flows are triggered by a schedule and can automate repetitive tasks.
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Basic aptitude questions. Could be done easily if practiced enough

Q1. Introduce yourself
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Q2. Array searching
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Q1. Domain specific
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Q2. Tell me about yourself
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Q1. Check your conviction
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Q2. How serious you are for the job
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Q1. Java questions , stream api
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Q2. Whatever you have mention in resume
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