GoDaddy Interview Questions and Answers

Q1. Deep dive on current migration project and architecture, Type of dimensional modelling , normalization & de normalization
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Q2. Which AWS services used and AWS architecture for those services
Ans. 
AWS services used include S3, Redshift, Glue, EMR, and Lambda in a scalable and cost-effective architecture.
• AWS S3 for storing large amounts of data

• AWS Redshift for data warehousing and analytics

• AWS Glue for ETL processes

• AWS EMR for big data processing

• AWS Lambda for serverless computing
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Q1. Current project end to end explanation
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Developed a real-time data processing pipeline for analyzing customer behavior
• Designed and implemented data ingestion process using Apache Kafka

• Utilized Apache Spark for data processing and analysis

• Built data models and visualizations using tools like Tableau

• Implemented machine learning algorithms for predictive analytics
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Q2. Questions on spark optimization, Coalesce/Repartition, Handling data skew
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Q3. Explain spark submit command in detail
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Spark submit command is used to submit Spark applications to a cluster
• Used to launch Spark applications on a cluster

• Requires specifying the application JAR file, main class, and any arguments

• Can set various configurations like memory allocation, number of executors, etc.

• Example: spark-submit --class com.example.Main --master yarn --deploy-mode cluster myApp.jar arg1 arg2
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Q4. SQL question on self join
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Self join in SQL allows a table to be joined with itself to compare rows within the same table.
• A self join is used when you want to compare rows in the same table.

• It requires an alias for the table to differentiate between the two instances.

• Example: SELECT a.EmployeeID, b.ManagerID FROM Employees a JOIN Employees b ON a.EmployeeID = b.ManagerID;

• Self joins can be used to find hierarchical data, such as employee-manager ...read more
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Q5. Easy Python question on printing even numbers in a range
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This task involves printing even numbers within a specified range using Python.
• Use the range() function to define the range of numbers.

• Utilize a for loop to iterate through the numbers in the range.

• Check if a number is even using the modulus operator (%).

• Print the number if it is even.

• Example: for i in range(1, 11): if i % 2 == 0: print(i) will print 2, 4, 6, 8, 10.
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Q1. Current project explanation end to end
Ans. 
Developed a real-time data processing pipeline for analyzing customer behavior
• Designed and implemented data ingestion process using Apache Kafka

• Utilized Apache Spark for data processing and analysis

• Built data models and visualizations using tools like Tableau

• Implemented machine learning algorithms for predictive analytics
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Q2. PySpark coding question
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Q3. Question on spark internals JVM & GC
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Q4. Configure Cluster for 100 TB data
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To configure a cluster for 100 TB data, consider factors like storage capacity, processing power, network bandwidth, and fault tolerance.
• Choose a distributed storage system like HDFS or Amazon S3 for scalability and fault tolerance.

• Select high-capacity servers with sufficient RAM and CPU for processing large volumes of data.

• Ensure high-speed network connections between nodes to facilitate data transfer.

• Implement data r...read more
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Q1. Current project architecture end to end
Ans. 
Our current project architecture involves a microservices-based approach with data pipelines for real-time processing.
• Utilizing microservices architecture for scalability and flexibility

• Implementing data pipelines for real-time processing of large volumes of data

• Leveraging cloud services such as AWS or Azure for infrastructure

• Using technologies like Apache Kafka for streaming data

• Ensuring data quality and reliability t...read more
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Q2. Case study with order management , Create Facts & dimension for Amazon orders
Ans. 
Designing a data model for Amazon orders with facts and dimensions for effective order management.
• Fact Table: Order Facts - Contains metrics like order_id, total_amount, order_date, and customer_id.

• Dimension Table: Customer Dimension - Includes customer_id, name, email, and address.

• Dimension Table: Product Dimension - Contains product_id, product_name, category, and price.

• Dimension Table: Time Dimension - Includes orde...read more
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Q3. SQL query to find the 2nd most order item in a category
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Use a SQL query with a subquery to find the 2nd most ordered item in a category.
• Use a subquery to rank items within each category based on the number of orders

• Select the item with rank 2 within each category

• Order the results by category and rank to get the 2nd most ordered item in each category
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2 coding questions 1 easy ,1 hard , 20 MCQ question and 1 SQL question

Q1. Asked questions of coding round
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Q2. Questions about project ,jwt architecture,nextjs vs react
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Q1. 2 SQL query using group by
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SQL queries using GROUP BY aggregate data based on specified columns, allowing for summary statistics.
• GROUP BY is used to arrange identical data into groups.

• Example: SELECT department, COUNT(*) FROM employees GROUP BY department; - counts employees per department.

• You can use aggregate functions like SUM, AVG, MAX, MIN with GROUP BY.

• Example: SELECT department, AVG(salary) FROM employees GROUP BY department; - calculates...read more
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Q2. Question about projects and cs fundamentals
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Q1. What are statics functions in OOPS
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Static functions in OOP are functions that belong to the class itself, rather than to instances of the class.
• Static functions can be called without creating an instance of the class.

• They are commonly used for utility functions that do not require access to instance-specific data.

• Static functions are declared using the 'static' keyword in many programming languages.

• Example: In Java, a static function in a class can be c...read more
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Q2. What is Polymorphism in OOPs
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Polymorphism in OOPs allows objects of different classes to be treated as objects of a common superclass.
• Polymorphism allows methods to be called on objects of different classes that all inherit from a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overriding in inheritance and method overloading within the same class.
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Q3. What is websockets and its alternative
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Websockets are a communication protocol that allows for full-duplex communication between a client and a server over a single, long-lived connection.
• Websockets provide real-time, bi-directional communication between a client and a server.

• They are commonly used in applications that require instant updates, such as chat applications, online gaming, and financial trading platforms.

• Websockets use a persistent connection, u...read more
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Q4. What is JWT and How it works
Ans. 
JWT stands for JSON Web Token, a compact and self-contained way for securely transmitting information between parties as a JSON object.
• JWT is composed of three parts: header, payload, and signature.

• Header typically consists of the type of token and the hashing algorithm being used.

• Payload contains the claims, which are statements about an entity and additional data.

• Signature is created by encoding the header, payload, ...read more
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Q1. Basic details around experience
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Q1. Basic details and system design
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Q1. Coding for a solution
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