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The Ultimate Cheat Sheet On Hadoop

Top 20 frequently asked questions to test your Hadoop knowledge given in the below Hadoop cheat sheet. Try finding your own answers and match the answers given here.




Question #1 

You have written a MapReduce job that will process 500 million input records and generate 500 million key-value pairs. The data is not uniformly distributed. Your MapReduce job will create a significant amount of intermediate data that it needs to transfer between mappers and reducers which is a potential bottleneck. A custom implementation of which of the following interfaces is most likely to reduce the amount of intermediate data transferred across the network?



A. Writable
B. WritableComparable
C. InputFormat
D. OutputFormat
E. Combiner
F. Partitioner
Ans: e




Question #2 

Where is Hive metastore stored by default ?


A. In HDFS
B. In client machine in the form of a flat file.
C. In client machine in a derby database
D. In lib directory of HADOOP_HOME, and requires HADOOP_CLASSPATH to be modified.
Ans: c




Question…

Real points you need to learn in Cloud security Training

#the-top-course-contents-you-need-for-cloud-security
Course contents
The below are the complete list of course contents that you need in Cloud security trainings to ensure that your training is perfect. Missing any of these, you will miss many things.
  • Cloud Architecture: - Computing Evolution, cloud vocabulary, Essential Characteristics of Cloud Computing, Cloud deployment models, Cloud Service Models, Multi- Tenancy, Approaches to create a barrier between the Tenants, cloud computing vendors, Cloud Computing threats, Cloud Reference Model, The Cloud Cube Model, Security for Cloud Computing
  • How Security Gets Integrated - Governance and Enterprise Risk Management - Information security governance processes, Governance and enterprise risk management in Cloud Computing, Governance Recommendations, Enterprise Risk Management Recommendations, Information Risk
  • Management Recommendations, Third Party Management Recommendations, Legal and Electronic Discovery Risk Management , Legal and Electronic Discovery Risk Management Security Recommendations.
  • Compliance and Audit - Cloud customer responsibilities, Compliance and Audit Security Information Lifecycle Management - Key challenges regarding data lifecycle security, Data Security Recommendations by ILM Phase
  • Portability and Interoperability - Changing providers reasons, Changing providers expectations, Recommendations all cloud solutions, IaaS Cloud Solutions, PaaS Cloud Solutions, SaaS Cloud Solutions
  • Traditional Security, Business Continuity, and Disaster Recovery- Risk of insider abuse, Security baseline, Customers actions, Contract, Documentation, Recovery Time Objectives (RTOs) ,Customers responsibility, Vendor Security Process (VSP)
  • Data Center Operations - Data Center Operations, Security challenge, Implement “Five Principal Characteristics of Cloud Computing, Data center Security Recommendations
  • Incident Response, Notification, and Remediation - How to identify incident, How to response to security incident, Security incident Containment, Security Incident Response Application Security -Web Application, Application Weaknesses, Attack Methods, What is Web Application Security, application security layer, vulnerability distribution, Why Web Application Risks Occur, Security solutions, Applications in cloud environments
  • Encryption and Key Management -Encryption for Confidentiality and Integrity, Encrypting data at rest, Key Management Lifecycle, Cloud Encryption Standards, Identity and Access Management - Identity and Access Management in the cloud, Identity and Access Management functions, Identity and Access Management (IAM) Model, Identity Federation, Identity Provisioning Recommendations, Authentication for SaaS and Paas customers, Authentication for IaaS customers, Introducing Identity Services, Enterprise Architecture with IDaaS , IDaaS Security Recommendations
  • Virtualization - Hardware Virtualization, Software Virtualization, Memory Virtualization, Storage Virtualization, Data Virtualization, Network Virtualization, Virtualization Security Enisa - Cloud Computing Risk Assessment - Guidelines

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