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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…

Aws course contents ideas to learn

What you are going to learn in AWS course is matter. So before you take the course just look at the course contents on aws. 


aws concepts
AWS Course Contents for beginners

What you will get after taking Aws course
  • Recognize terminology and concepts as they relate to the AWS platform
  • Navigate the AWS Management Console
  • Understand the security measures AWS provides
  • Differentiate AWS Storage options and create an Amazon Simple Storage Service (S3) bucket
  • Recognize AWS Compute and Networking options and use Amazon Elastic Compute Cloud (EC2) and Amazon Elastic Block Storage (EBS)
  • Describe Managed Services and Database options
  • Use Amazon Relational Database Service (RDS) to launch an application
  • Identify Deployment and Management options
Intended Audience
  • Individuals responsible for articulating the business benefits of AWS services
  • Any individual who is new to AWS
  • SysOps Administrators and Developers who are interested in using AWS services
This course includes activities that will allow you to test new skills and apply knowledge through hands-on lab activities.

Aws Course Outline

Module 1: Introduction; History to AWS

  • Navigate the AWS Management Console
  • Recognize AWS Global Infrastructure
  • Describe the security measures AWS provides

Module 2: AWS Storage & Content Delivery

  • Identify key AWS storage options
  • Describe Amazon EBS
  • Create an Amazon S3 bucket and manage associated objects

Module 3: Compute Services & Networking

  • Identify the different AWS compute and networking options
  • Describe an Amazon Virtual Private Cloud (VPC)
  • Create an Amazon EC2 instance
  • Verify how to use Amazon EBS

Module 4: AWS Managed Services & Database

  • Describe Amazon DynamoDB
  • Verify key aspects of Amazon RDS
  • Execute an Amazon RDS drive application

Module 5: Deployment and Management

  • Identify AWS CloudFormation
  • Describe Amazon CloudWatch metrics and alarms
  • Describe Amazon Identity and Access Management (IAM)

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