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Jio Platforms Data Engineer Interview Questions and Answers
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4 interviews found
Anonymous
Selected
I applied via campus placement at Visvesvaraya National Institute of Technology (VNIT), Nagpur and was interviewed before May 2023. There were 3 interview rounds.
(2 Questions)
- Q1. Remove duplicates from array
- Ans.
Use a Set to remove duplicates from an array of strings.
Create a Set from the array to automatically remove duplicates
Convert the Set back to an array to get the final result
- Q2. SQL joins related questions
(2 Questions)
- Q1. Why Java is independent
- Ans.
Java is independent due to its platform-independent nature and write once, run anywhere principle.
Java programs are compiled into bytecode, which can be executed on any platform with a Java Virtual Machine (JVM)
Java follows the principle of 'write once, run anywhere', allowing developers to write code on one platform and run it on any other platform without modification
Java's platform independence is achieved through t...
- Q2. Reverse linked list problem
- Ans.
Reverse a linked list by changing the direction of pointers
Create a new linked list with reversed order of nodes
Iterate through the original linked list and insert each node at the beginning of the new list
Update the head of the new list to point to the last node inserted
(2 Questions)
- Q1. Tell me about urself
- Q2. Why should we hire you
Interview Preparation Tips
Skills evaluated in this interview
I applied via campus placement at Ramaiah Institute of Technology, Bengaluru
Hacker earth test contains 2 questions 1 code and 1 sql
(1 Question)
- Q1. Based on resume
(1 Question)
- Q1. Managarial round
Selected
I applied via Naukri.com and was interviewed before May 2023. There were 4 interview rounds.
- (python) Questions mainly on Oops concepts and Data Structure, String Manipulation
- (SQL) Time series and Customer Database Question
(3 Questions)
- Q1. Good understanding about Python and SQL
- Q2. In Depth knowledge of Hadoop ecosystem and Spark
- Q3. About your project
(2 Questions)
- Q1. About Your background and education
- Q2. If experience then about project
(1 Question)
- Q1. Nothing much just about company and salary discussion
Selected
I applied via Campus Placement and was interviewed before Mar 2023. There were 2 interview rounds.
(1 Question)
- Q1. Basics of SQL - DDL,DML
(1 Question)
- Q1. Scenario based questions - difference between delete and truncate
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Data Engineer Interview Questions & Answers
Virtusa Consulting Services
SHIKHA
posted on 31 Dec 2024
(4 Questions)
- Q1. What is the architecture of Apache Spark?
- Ans.
Apache Spark architecture includes a cluster manager, worker nodes, and driver program.
Apache Spark architecture consists of a cluster manager, which allocates resources and schedules tasks.
Worker nodes execute tasks and store data in memory or disk.
Driver program coordinates tasks and communicates with the cluster manager.
Spark applications run as independent sets of processes on a cluster, coordinated by the SparkCon...
- Q2. What is the difference between the reduceBy and groupBy transformations in Apache Spark?
- Ans.
reduceBy is used to aggregate data based on key, while groupBy is used to group data based on key.
reduceBy is a transformation that combines the values of each key using an associative function and a neutral 'zero value'.
groupBy is a transformation that groups the data based on a key and returns a grouped data set.
reduceBy is more efficient for aggregating data as it reduces the data before shuffling, while groupBy shu...
- Q3. What is the difference between RDD (Resilient Distributed Datasets) and DataFrame in Apache Spark?
- Ans.
RDD is a low-level abstraction representing a distributed collection of objects, while DataFrame is a higher-level abstraction representing a distributed collection of data organized into named columns.
RDD is more suitable for unstructured data and low-level transformations, while DataFrame is more suitable for structured data and high-level abstractions.
DataFrames provide optimizations like query optimization and code...
- Q4. What are the different modes of execution in Apache Spark?
- Ans.
The different modes of execution in Apache Spark include local mode, standalone mode, YARN mode, and Mesos mode.
Local mode: Spark runs on a single machine with one executor.
Standalone mode: Spark runs on a cluster managed by a standalone cluster manager.
YARN mode: Spark runs on a Hadoop cluster using YARN as the resource manager.
Mesos mode: Spark runs on a Mesos cluster with Mesos as the resource manager.
I applied via LinkedIn and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. How to Ensure Data loss in ETL pipeline
- Q2. Why to spin up Dataproc cluster when there is serverless batch job exists.
I applied via Campus Placement and was interviewed in Oct 2024. There was 1 interview round.
(2 Questions)
- Q1. Write code in regular expression to remove the special characters
- Ans.
Use regular expression to remove special characters from a string
Use the regex pattern [^a-zA-Z0-9\s] to match any character that is not a letter, digit, or whitespace
Use the replace() function in your programming language to replace the matched special characters with an empty string
Example: input string 'Hello! How are you?' will become 'Hello How are you' after removing special characters
- Q2. Questions on resume
I applied via Naukri.com and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. Spark Architecture
- Q2. Cache vs persist, lazy evaluation
(2 Questions)
- Q1. What is Databricks, Internals of it, Optimization technique
- Ans.
Databricks is a unified analytics platform that provides a collaborative environment for data scientists, engineers, and analysts.
Databricks is built on top of Apache Spark, providing a unified platform for data engineering, data science, and business analytics.
Internals of Databricks include a cluster manager, job scheduler, and workspace for collaboration.
Optimization techniques in Databricks include query optimizati...
- Q2. SQL questions of joins,group by
(2 Questions)
- Q1. Scenario based azure data factory questions
- Q2. Project structres, pyspark dataframes related
Interview Preparation Tips
Skills evaluated in this interview
(1 Question)
- Q1. Python SQL question
(1 Question)
- Q1. More on Project side
(1 Question)
- Q1. Salary Discussion
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552
salaries
|  ₹4.1 L/yr - ₹16.1 L/yr |
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511
salaries
| ₹3 L/yr - ₹13.2 L/yr |
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452
salaries
| ₹3 L/yr - ₹10 L/yr |
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417
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358
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