GSPANN Technologies Interview Questions, Process, and Tips

They ask you to share your screen and ask you to write the code. It is easy if you have prepared well

Q1. Aggregation & grouping in spark
Ans. 
Aggregation & grouping in Spark
• Aggregation is the process of combining data from multiple sources into a single result

• Grouping is the process of dividing data into groups based on a specific criteria

• Spark provides various functions for aggregation and grouping such as groupBy, reduceByKey, aggregateByKey, etc.

• These functions can be used to perform operations like sum, count, average, etc. on grouped data
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Q2. Easy if you know basics of SQL coding
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Q1. What are your salary expectations?
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Q2. They will shortlist the salary based on the skillset
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Q1. Questions asked from resume
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Q2. Spark optimisation techniques
Ans. 
Spark optimisation techniques
• Partitioning data to reduce shuffling

• Caching frequently used data

• Using broadcast variables for small data

• Avoiding unnecessary data shuffling

• Tuning memory allocation and garbage collection

• Using efficient data formats like Parquet

• Using appropriate hardware configurations

• Optimizing SQL queries using DataFrame and Dataset APIs
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Q3. Explain spark architecture
Ans. 
Spark architecture is a distributed computing system that provides high-level APIs for processing large datasets.
• Spark architecture consists of a cluster manager, a distributed storage system, and a set of worker nodes.

• The cluster manager, such as Apache Mesos or Hadoop YARN, allocates resources and schedules tasks.

• The distributed storage system, like Hadoop Distributed File System (HDFS), stores the data across the cl...read more
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Q4. Hive related questions
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Q5. Explain your project
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Q1. More in-depth questions from whatever skills mentioned in resume
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Q1. Final round result and salary discussion
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Q1. Java technical questions
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Q1. Spring boot questions
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Q1. Self introduction, communication skills
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Q1. How to add dependency SDKs for perticular build flavour.
Ans. 
To add dependency SDKs for a particular build flavor, modify the build.gradle file and specify the dependencies for that flavor.
• Open the build.gradle file for your project

• Locate the section for the desired build flavor

• Inside the dependencies block, add the necessary SDK dependencies

• Sync the project to apply the changes
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Q2. Kotlin Basics & Android Platform
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Q3. Java programming language and Oops concepts in depth.
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Q4. What is MVVM architecture and it's Advantages.
Ans. 
MVVM is a software architecture pattern that separates the user interface from the business logic.
• MVVM stands for Model-View-ViewModel.

• Model represents the data and business logic.

• View represents the user interface.

• ViewModel acts as a mediator between the View and Model.

• Advantages include easier testing, separation of concerns, and improved maintainability.

• Example: Xamarin.Forms uses MVVM architecture for cross-platfor
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Q5. What RX Java and RXAndroid
Ans. 
RX Java and RXAndroid are reactive programming libraries for Java and Android respectively.
• RX Java and RXAndroid allow for asynchronous and event-based programming.

• They use Observables and Subscribers to handle data streams.

• They simplify complex code and make it easier to handle concurrency.

• Example use cases include network requests and UI updates.

• RXJava is used in popular Android libraries like Retrofit and Room.
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Q6. What are Coroutines in Kotlin and it's Advantages Over Multithreading.
Ans. 
Coroutines are lightweight threads in Kotlin that allow for asynchronous programming without the overhead of traditional multithreading.
• Coroutines are cooperative, meaning they can pause and resume execution at specific points in the code.

• They are more efficient than multithreading because they don't require creating new threads for each task.

• Coroutines can be used for both CPU-bound and IO-bound tasks.

• They simplify er...read more
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