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最新的 Dell EMC Certification DEA-7TT2 免費考試真題:

1. The web analytics team uses Hadoop to process access logs. They now want to correlate this data with structured user data residing in a production single-instance JDBC database. They collaborate with the production team to import the data into Hadoop.
Which tool should they use?
Response:

A) Pig
B) Chukwa
C) Scribe
D) Sqoop

2. Refer to the exhibit.

You are asked to write a report on how specific variables impact your client's sales using a data set provided to you by the client. The data includes 15 variables that the client views as directly related to sales, and you are restricted to these variables only.
After a preliminary analysis of the data, the following findings were made:
1. Multicollinearity is not an issue among the variables
2. Only three variables-A, B, and C-have significant correlation with sales You build a linear regression model on the dependent variable of sales with the independent variables of A, B, and C. The results of the regression are seen in the exhibit.
Which interpretation is supported by the analysis?
Response:

A) Due to the R2 of 0.10, the model is not valid - the linear regression should be rerun with all 15 variables forced into the model to increase the R2
B) Variables A, B, and C are significantly impacting sales, but are not effectively estimating sales
C) Due to the R2 of 0.10, the model is not valid - a different analytical model should be attempted
D) Variables A, B, and C are significantly impacting sales and are effectively estimating sales

3. You submit a MapReduce job to a Hadoop cluster. Although the job was successfully submitted, you notice that it is not completing. What should be done?
Response:

A) Ensure that the TaskTracker is running
B) Ensure that the NameNode is running
C) Ensure that a DataNode is running
D) Ensure that the JobTracker is running

4. Which activity is performed in the Operationalize phase of the Data Analytics Lifecycle?
Response:

A) Transform existing variables
B) Try different analytical techniques
C) Try different variables
D) Define the process to maintain the model

5. Refer to the exhibit.

Click on the calculator icon in the upper left corner. An analyst is searching a corpus of documents for the topic "solid state disk".
In the Exhibit, Table A provides the inverse document frequency for each term across the corpus. Table B provides each term's frequency in four documents selected from corpus.
Which of the four documents is most relevant to the analyst's search?
Response:

A) Document C
B) Document D
C) Document A
D) Document B

問題與答案：