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NEW QUESTION # 92
Which word or phrase completes the statement? A Data Scientist would consider that a RDBMS is to a Table as R is to a ________.
- A. Matrix
- B. Array
- C. List
- D. Data frame
Answer: D
NEW QUESTION # 93
In addition to less data movement and the ability to use larger datasets in calculations, what is a benefit of analytical calculations in a database?
- A. more efficient handling of categorical values
- B. improved connections between disparate data sources
- C. full use of data aggregation functionality
- D. quicker time to insight
Answer: D
NEW QUESTION # 94
How is HDFS defined?
- A. Large "web table" capable of holding millions of rows and millions of columns
- B. Reliable, redundant distributed file system
- C. Row-column oriented datastore supporting redundancy and high availability
- D. Reliable file system stored on a single extensible storage platform
Answer: B
NEW QUESTION # 95
Refer to the exhibit.
You are using k-means clustering to discover groupings within a data set. You plot within- sum-of-squares (wss) of multiple cluster sizes.
Based on the exhibit, how many clusters should you use in your analysis?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 96
For which class of problem is Map Reduce most suitable?
- A. Non-overlapping queries
- B. Embarrassingly parallel
- C. Minimal result data
- D. Simple marginalization tasks
Answer: B
NEW QUESTION # 97
During a study to understand the population growth of a certain bacterial culture, you plot the data and identify a quadratic growth trend over time.
Which transformation should you apply to linearize the data?
- A. Cube
- B. Add a constant
- C. Square
- D. Square root
Answer: D
NEW QUESTION # 98
Which graphical representation shows the distribution and multiple summary statistics of a continuous variable for each value of a corresponding discrete variable?
- A. binplot
- B. box and whisker plot
- C. scatterplot
- D. dotplot
Answer: B
NEW QUESTION # 99
You have numeric data for more than 500 observations. You are interested in identifying linear relationships among these numeric variables.
Which R function should you employ to get the best visualization?
- A. lm()
- B. pairs()
- C. rug()
- D. plot(density())
Answer: B
NEW QUESTION # 100
Which SQL OLAP extension provides all possible grouping combinations?
- A. CUBE
- B. CROSS JOIN
- C. ROLLUP
- D. UNION ALL
Answer: A
NEW QUESTION # 101
To ensure a successful analytic project, which key role can consult and advise the project team on the value of end results and how these will be used on a daily basis?
- A. Project Manager
- B. Business Intelligence Analyst
- C. Data Scientist
- D. Business User
Answer: D
NEW QUESTION # 102
What are two data categories that represent quantitative data?
- A. Ratio and interval
- B. Ordinal and interval
- C. Nominal and ordinal
- D. Nominal and ratio
Answer: A
NEW QUESTION # 103
You have been assigned to perform a study of the daily revenue effect of a pricing model of online transactions. When is the analytics lifecycle considered completed?
- A. When a model has been completely developed and the results have shown statistically acceptable results.
- B. When the results of the model have been presented to both the internal analytics team and the business owner of the project.
- C. When written documentation has been produced and the code has been handed off to the DBA/operations.
- D. When a model has been completely developed based on both a sample of the data and the entire set of data available.
Answer: C
NEW QUESTION # 104
What is the output format from the Map function of MapReduce?
- A. Compressed index
- B. Binary representation of keys concatenated with structured data
- C. Unique key record and separate records of all possible values
- D. Key-value pairs
Answer: D
NEW QUESTION # 105
Which word or phrase completes the statement? Business Intelligence is to ad-hoc reporting and dashboards as Data Science is to __________.
- A. Structured Data and Data Sources
- B. Optimization and Predictive Modeling
- C. Sales and profit reporting
- D. Alerts and Queries
Answer: B
NEW QUESTION # 106
Refer to the exhibit.
You have created a density plot of purchase amounts from a retail website as shown.
What should you do next?
- A. Recreate the density plot using a log normal distribution of the purchase amount data
- B. Recreate the plot using the barplot() function
- C. Use the rug() function to add elements to the plot
- D. Reduce the sample size of the purchase amount data used to create the plot
Answer: A
NEW QUESTION # 107
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