A Company Wants to Research User Turnover by Analyzing the Past

question 94

Multiple Choice

A company wants to research user turnover by analyzing the past 3 months of user activities. With millions of users, 1.5 TB of uncompressed data is generated each day. A 30-node Amazon Redshift cluster with 2.56 TB of solid state drive (SSD) storage for each node is required to meet the query performance goals. The company wants to run an additional analysis on a year's worth of historical data to examine trends indicating which features are most popular. This analysis will be done once a week. What is the MOST cost-effective solution?

• A) Increase the size of the Amazon Redshift cluster to 120 nodes so it has enough storage capacity to hold 1 year of data. Then use Amazon Redshift for the additional analysis.
• B) Keep the data from the last 90 days in Amazon Redshift. Move data older than 90 days to Amazon S3 and store it in Apache Parquet format partitioned by date. Then use Amazon Redshift Spectrum for the additional analysis.
• C) Keep the data from the last 90 days in Amazon Redshift. Move data older than 90 days to Amazon S3 and store it in Apache Parquet format partitioned by date. Then provision a persistent Amazon EMR cluster and use Apache Presto for the additional analysis.
• D) Resize the cluster node type to the dense storage node type (DS2) for an additional 16 TB storage capacity on each individual node in the Amazon Redshift cluster. Then use Amazon Redshift for the additional analysis.

Distinguish between internal and external mobilization strategies used by political parties.

Recognize the role of incumbency in electoral politics.

Identify key historical moments that led to the rise or fall of political parties.

Understand the features and management of Windows 10 family user accounts.

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Definitions:

Electro-Magnets

Devices that create a magnetic field when electric current flows through a coil wrapped around a metal core.

Magnetic Pole Fields

The regions at the two ends of a magnet where the magnetic force is strongest, known as the north and south magnetic poles.

Synchronous Speed Calculation

Synchronous speed calculation is the process of determining the speed at which the magnetic field of an AC motor rotates, which is based on the frequency of the power supply and the number of magnetic poles in the motor.

Locked Rotor Current

The current drawn by an electric motor when the rotor is not turning and power is applied, typically higher than the running current.