For a use case involving periodic data analysis jobs, what Oozie component ensures timely execution?

  • Bundle
  • Coordinator
  • Decision Control Nodes
  • Workflow
In the context of periodic data analysis jobs, the Oozie component ensuring timely execution is the Bundle. Bundles provide a higher-level abstraction for managing and scheduling multiple coordinators. They allow you to group and coordinate multiple jobs, making them suitable for use cases involving periodic and interdependent data analysis tasks.

During a massive data ingestion process, what mechanisms in Hadoop ensure data is not lost in case of system failure?

  • Checkpointing
  • Hadoop Distributed File System (HDFS) Federation
  • Snapshotting
  • Write-Ahead Logging (WAL)
Write-Ahead Logging (WAL) in Hadoop ensures data integrity during massive data ingestion. It records changes before they are applied, allowing recovery in case of system failure during the ingestion process.

For a MapReduce job processing time-sensitive data, what considerations should be made in the job configuration for timely execution?

  • Configuring Compression
  • Decreasing Reducer Count
  • Increasing Speculative Execution
  • Setting Map Output Compression
When processing time-sensitive data, increasing Speculative Execution in the job configuration can help achieve timely execution. Speculative Execution involves running duplicate tasks on other nodes to finish faster, reducing the impact of slow-running tasks on job completion time.

In the MapReduce framework, how is data locality achieved during processing?

  • Data Replication
  • Network Optimization
  • Node Proximity
  • Task Scheduling
Data locality in MapReduce is achieved through node proximity. The framework schedules tasks to nodes where the data is already stored, minimizing data transfer over the network. This strategy enhances performance by reducing data movement and leveraging the proximity of computation and data.

What advanced technique does Apache Spark employ for efficient data transformation in Hadoop?

  • Batch Processing
  • Data Serialization
  • In-Memory Processing
  • MapReduce
Apache Spark employs in-memory processing for efficient data transformation. It keeps intermediate data in memory, reducing the need to write to disk and significantly speeding up processing compared to traditional batch processing.

In the context of Hadoop, what is Apache Kafka commonly used for?

  • Batch Processing
  • Data Visualization
  • Data Warehousing
  • Real-time Data Streaming
Apache Kafka is commonly used for real-time data streaming. It is a distributed event streaming platform that enables the processing of real-time data feeds and events, making it valuable for scenarios that require low-latency data ingestion and processing.

In advanced Hadoop administration, ____ plays a critical role in managing cluster security.

  • Kerberos Authentication
  • Role-Based Access Control
  • SSL Encryption
  • Two-Factor Authentication
Kerberos authentication is crucial in advanced Hadoop administration for managing cluster security. It provides secure and authenticated communication between nodes, ensuring that only authorized users and services can access Hadoop resources. Role-based access control, SSL encryption, and two-factor authentication are additional security measures.

Effective monitoring of ____ is key for ensuring data security and compliance in Hadoop clusters.

  • Data Nodes
  • JobTracker
  • Namenode
  • ResourceManager
Effective monitoring of Namenode is key for ensuring data security and compliance in Hadoop clusters. The Namenode stores metadata and plays a crucial role in maintaining the integrity and security of the data stored in HDFS.

What is the primary purpose of Hadoop Streaming API in the context of processing data?

  • Batch Processing
  • Data Streaming
  • Real-time Data Processing
  • Script-Based Processing
The primary purpose of Hadoop Streaming API is to allow the integration of non-Java programs for processing data in Hadoop. It enables the use of scripts (e.g., Python or Perl) to serve as mappers and reducers, expanding the flexibility of Hadoop to process data using various languages.

In the case of a failed Hadoop job, what log information is most useful for identifying the root cause?

  • job.xml
  • jobtracker.log
  • syslog
  • tasktracker.log
In the case of a failed Hadoop job, the 'syslog' is the most useful log information for identifying the root cause. It contains system logs, including error messages and diagnostic information, providing insights into the issues that led to the job failure. Analyzing the syslog is essential for effective troubleshooting.

In Apache Flume, the ____ is used to extract data from various data sources.

  • Agent
  • Channel
  • Sink
  • Source
In Apache Flume, the Source is used to extract data from various data sources. It acts as an entry point for data into the Flume pipeline, collecting and forwarding events to the next stages in the pipeline.

In a case where historical data analysis is needed for trend prediction, which processing method in Hadoop is most appropriate?

  • HBase
  • Hive
  • MapReduce
  • Pig
For historical data analysis and trend prediction, MapReduce is a suitable processing method. MapReduce efficiently processes large volumes of data in batch mode, making it well-suited for analyzing historical datasets and deriving insights for trend prediction.