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Spark Online Test

The Apache Spark Online Test evaluates the candidate's ability to transform structured data with RDD API and SparkSQL (Datasets and DataFrames), convert big-data challenges into iterative/ multi-stage Spark scripts, optimize existing Spark jobs using partitioning/ caching and analyze graph structures using GraphX.

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Screen candidates with a 30 mins test

Test duration:  ~ 30 mins
Difficulty level:  Moderate
Availability:  Available as custom test
Questions:
  • 15 Spark MCQs
Covered skills:
Fundamentals of Spark Core
Developing and running Spark jobs (Java; Scala; Python)
Spark Resilient Distributed Datasets (RDD)
Data processing with Spark SQL
Dataframes and Datasets
Spark Streaming to process real-time data
Running Spark on a cluster
Implementing iterative and multi-stage algorithms
Tuning and troubleshooting Spark jobs in a cluster
Graph/ Network analysis with GraphX library
Migrating data from data sources/ databases
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Adaface skill assessments measure on-the-job skills of candidates, providing employers with an accurate tool for screening potential hires.

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Use the Spark Test to shortlist qualified candidates

The Spark Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • Understanding the fundamentals and architecture of Spark Core
  • Developing and running Spark jobs using Java, Scala, and Python
  • Working with Resilient Distributed Datasets (RDD) in Spark
  • Performing data processing with Spark SQL
  • Manipulating data using Dataframes and Datasets in Spark
  • Implementing Spark Streaming to process real-time data
  • Deploying and running Spark on a cluster
  • Applying iterative and multi-stage algorithms in Spark
  • Tuning and troubleshooting Spark jobs in a cluster
  • Conducting graph and network analysis using the GraphX library
  • Managing data migration from various sources and databases
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Screen candidates with the highest quality questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this Spark Test will be non-googleable.

๐Ÿง Question

Easy

Character count
Solve
Penny created a jar file for her character count example written in Java. The jar name is attempt.jar and the main class is com.penny.CharCount.java, which requires an input file name and output directory as input parameters. Which of the following is the correct command to submit a job in Spark with the given constraints?
 image

Medium

File system director
Spark Scala API
Spark Streaming
Solve
Review the following Spark job description:

1. Monitor file system director for new files. 
2. For new files created in the โ€œ/ramboโ€ dictionary, perform word count.

Which of the following snippets would achieve this?
 image

Medium

Grade-Division-Points
Spark Scala API
DataFrame
Solve
Consider the following Spark DataFrame:
 image
Which of the given code fragments produce the following result:
 image
 image
๐Ÿง Question๐Ÿ”ง Skill

Easy

Character count

2 mins

Spark
Solve

Medium

File system director
Spark Scala API
Spark Streaming

3 mins

Spark
Solve

Medium

Grade-Division-Points
Spark Scala API
DataFrame

4 mins

Spark
Solve
๐Ÿง Question๐Ÿ”ง Skill๐Ÿ’ช DifficultyโŒ› Time
Character count
Spark
Easy2 mins
Solve
File system director
Spark Scala API
Spark Streaming
Spark
Medium3 mins
Solve
Grade-Division-Points
Spark Scala API
DataFrame
Spark
Medium4 mins
Solve

Test candidates on core Spark Hiring Test topics

Fundamentals of Spark Core: Understanding Spark Core involves knowledge of the basic building blocks and execution model of Apache Spark, such as RDDs, transformations, and actions. This skill is necessary to develop efficient and scalable Spark applications.

Developing and running Spark jobs (Java; Scala; Python): Developing and running Spark jobs requires proficiency in programming languages like Java, Scala, or Python. This skill is crucial to write Spark applications using Spark APIs, perform data processing tasks, and leverage the power of Spark's distributed computing capabilities.

Spark Resilient Distributed Datasets (RDD): Spark RDDs are fundamental data structures in Spark that allow for distributed data processing and fault tolerance. Understanding RDDs is essential for efficient data manipulation, transformation, and parallel computing in Spark.

Data processing with Spark SQL: Spark SQL is a module in Spark that provides a programming interface for querying structured and semi-structured data using SQL-like syntax. This skill is important to analyze and process structured data using SQL operations and leverage the optimizations provided by Spark SQL's query engine.

Dataframes and Datasets: Dataframes and Datasets are higher-level abstractions built on top of RDDs in Spark. They provide a more expressive and efficient way to work with structured and unstructured data. Understanding Dataframes and Datasets is crucial for performing data manipulations, transformations, and aggregations efficiently in Spark.

Spark Streaming to process real-time data: Spark Streaming is a scalable and fault-tolerant stream processing library in Spark that allows for real-time data processing. This skill is important to handle continuous streams of data and perform real-time analytics, enabling applications to react to data changes in near real-time.

Running Spark on a cluster: Running Spark on a cluster involves configuring and deploying Spark applications across a distributed cluster infrastructure. This skill is necessary to take advantage of Spark's distributed computing capabilities and ensure optimal performance and scalability.

Implementing iterative and multi-stage algorithms: Implementing iterative and multi-stage algorithms in Spark involves designing and optimizing algorithms that require multiple iterations or stages to achieve the desired output. This skill is important for tasks like machine learning and graph processing that often involve complex iterative and multi-stage computations.

Tuning and troubleshooting Spark jobs in a cluster: Tuning and troubleshooting Spark jobs in a cluster requires expertise in identifying and resolving performance issues, optimizing resource utilization, and ensuring fault tolerance. This skill is crucial to maximize the efficiency and reliability of Spark applications running on a distributed cluster.

Graph/ Network analysis with GraphX library: GraphX is a graph computation library in Spark that provides an API for graph processing and analysis. Understanding GraphX is important for tasks like social network analysis, recommendation systems, and fraud detection that involve analyzing relationships and patterns in graph data.

Migrating data from data sources/ databases: Migrating data from data sources or databases to Spark involves understanding various data ingestion techniques, such as batch processing, streaming, and data connectors. This skill is necessary to efficiently transfer and process data from external sources in Spark for further analysis and computation.

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Have questions about the Spark Hiring Test?

What roles can I use the Spark Test for?

Here are few roles for which we recommend this test:

  • Spark Developer
  • Software Developer - Spark
  • Big Data Engineer
  • Senior Spark Developer
  • Scala Big Data Developer
  • Senior Big Data Engineer
  • Spark Engineer
Can I combine the Spark Test with the PySpark Test questions?

Yes, recruiters can request a single custom test with multiple skills, including PySpark. For more details on the PySpark Test, please refer to our test library.

How to use the Spark Test in my hiring process?

Use our assessment software at the early stages of your recruitment process. Add a link to the assessment in your job post or invite candidates via email. Adaface helps you identify the most skilled candidates quickly.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Non-googleable questions
  • IP proctoring
  • Screen proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser
  • Copy paste protection

Read more about the proctoring features.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

What is Spark Test?

The Spark Test is designed to evaluate a candidate's knowledge and skills in Apache Spark. This test is used by recruiters to identify candidates who are proficient in various Spark-related tasks such as developing and running Spark jobs, processing data with Spark SQL, and more. It is helpful in hiring roles where Spark expertise is required.

What topics are evaluated in the Spark Test?

The Spark Test covers a wide range of skills including Fundamentals of Spark Core, Spark SQL, Dataframes and Datasets, Spark Streaming, running Spark on a cluster, iterative algorithms, GraphX library, job tuning, and migrating data from various sources.

Can I test Spark and SQL together in a test?

Yes, you can combine both Spark and SQL skills in a single test. This is particularly useful for roles requiring expertise in data processing and analysis. For more details, refer to the SQL Online Test.

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

What is the cost of using this test?

You can check out our pricing plans.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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