Basic Spark Interview Questions These questions cover some of the fundamentals of Spark and are appropriate for those who have only basic experience using it. If you need a refresher, our Introduction to Spark
步骤一:准备数据 在开始实现面试题目之前,首先需要准备一些样本数据。可以使用Spark自带的示例数据集,或者自己创建一个简单的数据集。 步骤二:创建SparkSession frompyspark.sqlimportSparkSession# 创建SparkSessionspark=SparkSession.builder.appName("Spark Interview Questions").getOrCreate() 1. 2. 3. 4. 在这一...
接下来,使用Spark读取这个JSON文件并进行简单的处理: frompyspark.sqlimportSparkSession# 创建Spark会话spark=SparkSession.builder \.appName("SparkInterviewQuestions")\.getOrCreate()# 读取JSON数据df=spark.read.json("path/to/questions.json")# 显示数据df.show() 1. 2. 3. 4. 5. 6. 7. 8. 9. 1...
Spark SQL内置的日期函数对用户和性能都很友好。Spark SQL支持几乎所有日期函数。 下表中的Spark SQL日期函数可用于操作包含数据类型值的数据框列。该列表包含ApacheSpark中支持的几乎所有日期函数。 在本教程中,我使用的是airport数据集,该数据集是开源的,可以在Kaggle上找到: https://www.kaggle.com/flashgordon/us...
Apache Sparkis a unified analytics engine for big data processing, with built-in modules for streaming, SQL, machine learning and graph processing. Speed Run workloads 100x faster. Apache Spark achieves high performance for both batch and streaming data, using a state-of-the-art DAG scheduler, ...
üSpark SQL. üSpark MLIB. üSpark Graphix. üTunning and Debugging Spark. Kafka in Detailed üWhat is Kafka? üWhy Kafka? üInstalling kafka on localmode. üInstalling kafka on localmode with multiple servers. üInstalling kafka on multiple servers with distributed mode. ...
Spark SQL and Data Frames Scheduling/ Partitioning Capacity planning in Spark Introduction to programming in Scala Log analysis FAQ's on Hadoop Spark training & certification 1. What are the prerequisites of this training program? 2. What exams are necessary to become a Hadoop and Spark expert...
I wouldn't dream of hiring somebody in a technical role without doing that technical assessment because the number of times where I've had candidates either on paper on the CV, say, I'm a SQL expert or in an interview, saying, I'm brilliant at Excel, I'm brilliant at this. And you...
Spark Code Hub.com is Free Online Tutorials Website Providing courses in Spark, PySpark, Python, SQL, Angular, Data Warehouse, ReactJS, Java, Git, Algorithms, Data Structure, and Interview Questions with Examples
Esta pregunta comprueba la capacidad del candidato para utilizar Spark SQL para consultar datos, lo que es esencial para las tareas de análisis de datos. Respuesta: # Register the DataFrame as a SQL temporary viewdf.createOrReplaceTempView("table")# Execute SQL queryresult=spark.sql("SELECT...