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EMC DEA-7TT2 Certification Exam is an industry-recognized certification that is designed to test the knowledge and skills of individuals in the field of data science and big data analytics. DEA-7TT2 exam is specifically designed for individuals who want to demonstrate their expertise in data science and big data analytics and earn recognition for their skills. DEA-7TT2 exam is designed to validate an individual’s knowledge in various areas, such as data science concepts, big data analytics, data mining, machine learning, and statistical analysis.
EMC DEA-7TT2 certification exam is an associate-level certification program that aims to equip individuals with the essential knowledge and skills to handle big data and apply data science techniques in a real-world scenario. Associate - Data Science and Big Data Analytics v2 Exam certification exam is designed for individuals who are interested and passionate about data science and big data analytics. It is a comprehensive program that provides an in-depth understanding of key data analytics concepts such as data querying, data cleansing, data transformation, and data visualization.
EMC DEA-7TT2 exam is a two-hour technical exam that consists of 60 multiple-choice questions. DEA-7TT2 exam covers a wide range of topics such as data analytics, big data technologies, and data visualization. To pass the exam, candidates must have a strong understanding of statistical analysis, data mining, and machine learning algorithms. Moreover, they should be familiar with big data tools and technologies such as Hadoop, MapReduce, and Hive. Associate - Data Science and Big Data Analytics v2 Exam certification is ideal for those seeking an entry-level position in data science or big data analytics.
NEW QUESTION # 108
Which word or phrase completes the statement? Mahout is to Hadoop as MADlib is to _______.
Response:
- A. R
- B. SAS
- C. Excel
- D. PostgreSQL
Answer: D
NEW QUESTION # 109
You have fit a decision tree classifier using 12 input variables. The resulting tree used 7 of the 12 variables, and is 5 levels deep. Some of the nodes contain only 3 data points. The AUC of the model is 0.85.
What is your evaluation of this model?
Response:
- A. The AUC is high, so the overall model is accurate. It is not well-calibrated, because the small nodes will give poor estimates of probability.
- B. The AUC is high, and the small nodes are all very pure. This is an accurate model.
- C. The tree did not split on all the input variables. You need a larger data set to get a more accurate model.
- D. The tree is probably overfit. Try fitting shallower trees and using an ensemble method.
Answer: D
NEW QUESTION # 110
Data visualization is used in the final presentation of an analytics project. For what else is this technique commonly used?
Response:
- A. Data exploration
- B. Model selection
- C. Descriptive statistics
- D. ETLT
Answer: A
NEW QUESTION # 111
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 and are 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, but are not effectively estimating sales
Answer: D
NEW QUESTION # 112
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?
Response:
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 113
Since R factors are categorical variables, they are most closely related to which data classification level?
Response:
- A. interval
- B. ratio
- C. ordinal
- D. nominal
Answer: D
NEW QUESTION # 114
You are using MADlib for Linear Regression analysis. Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;
Response:
- A. Goodness of fit
- B. P-value
- C. Standard error
- D. Coefficients
Answer: A
NEW QUESTION # 115
What is LOESS used for?
Response:
- A. It fits a smoothed curve to scatterplot data, to give a general sense of the data,s behavior.
- B. It is run after a one-way ANOVA, to determine which population has the highest mean value.
- C. It is a significance test for the correlation between two variables.
- D. It plots a continuous variable versus a discrete variable, to compare distributions across classes.
Answer: A
NEW QUESTION # 116
Refer to the exhibit.
What provides the decision tree for predicting whether or not someone is a good or bad credit risk. What would be the assigned probability, p(good), of a single male with no known savings?
Response:
- A. 0.83
- B. 0.6
- C. 0.498
- D. 0
Answer: A
NEW QUESTION # 117
In linear regression, what indicates that an estimated coefficient is significantly different than zero?
Response:
- A. A small p-value
- B. R-squared near 0
- C. The estimated coefficient is greater than 3
- D. R-squared near 1
Answer: A
NEW QUESTION # 118
In a t-test with unknown variance, what values are used to calculate the t-statistic?
Response:
- A. Sample mean, standard deviation, and sample size
- B. Sample mean, sample standard deviation, and sample size
- C. Mean, standard deviation, and population size
- D. Mean, sample standard deviation, and population size
Answer: B
NEW QUESTION # 119
Which activity is performed in the Operationalize phase of the data analytics lifecycle?
Response:
- A. Assess the benefits
- B. Try different variables
- C. Try different analytical techniques
- D. Transform existing variables
Answer: A
NEW QUESTION # 120
You have an automotive database containing numeric characteristics such as engine size, horsepower, and top speed. Which technique could you use to group similar cars together?
Response:
- A. K-means clustering
- B. Association rules
- C. Logistic regression
- D. Naive Bayes classifier
Answer: A
NEW QUESTION # 121
You have the following corpus of texts:
"The cat hit the dog."
"The dog bit the mail carrier."
"The mail carrier chased the truck."
"The truck hit the wall while avoiding the dog that chased the cat."
"The cat climbed the wall."
If the tf-idf metric is used to score relevance for search and retrieval, which term has the highest discriminatory power?
Response:
- A. Bit
- B. Chased
- C. Dog
- D. Truck
Answer: A
NEW QUESTION # 122
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. Chukwa
- B. Sqoop
- C. Scribe
- D. Pig
Answer: B
NEW QUESTION # 123
Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
You decide to run the association rules algorithm where minimum support is 50%. Which rule has a confidence at least 50%?
Response:
- A. {soda} => {milk}
- B. {cheese} => {bread}
- C. {juice} => {cheese}
- D. {milk} => {soda}
Answer: B
NEW QUESTION # 124
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 JobTracker is running
- B. Ensure that a DataNode is running
- C. Ensure that the TaskTracker is running
- D. Ensure that the NameNode is running
Answer: C
NEW QUESTION # 125
In a decision tree, what is an example of a pure node?
Response:
- A. 75 positives; 25 negatives
- B. 25 positives; 75 negatives
- C. 50 positives; 50 negatives
- D. 100 positives; 0 negatives
Answer: D
NEW QUESTION # 126
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?
Response:
- A. Data Scientist
- B. Business Intelligence Analyst
- C. Business User
- D. Project Manager
Answer: C
NEW QUESTION # 127
In data visualization, which type of chart is recommended to represent frequency data?
Response:
- A. Histogram
- B. Scatterplot
- C. Line chart
- D. Q-Q chart
Answer: A
NEW QUESTION # 128
Which word or phrase completes the statement; "A data scientist would consider a RDBMS is to a table as R is to a_____."?
Response:
- A. Array
- B. List
- C. Data frame
- D. Matrix
Answer: C
NEW QUESTION # 129
For which class of problem is Map Reduce most suitable?
Response:
- A. Non-overlapping queries
- B. Minimal result data
- C. Simple marginalization tasks
- D. Embarrassingly parallel
Answer: D
NEW QUESTION # 130
You have been assigned to do a study of the daily revenue effect of a pricing model of online transactions. When have you completed the analytics lifecycle?
Response:
- A. You have a completely developed model, and the results have shown statistically acceptable results.
- B. You have a completely developed model based on both a sample of the data and the entire set of data available.
- C. You have presented the results of the model to both the internal analytics team and the business owner of the project.
- D. You have written documentation, and the code has been handed off to the Data Base Administrator and business operations.
Answer: D
NEW QUESTION # 131
A disk drive manufacturer has a defect rate of less than 1.5% with 98% confidence. A quality assurance team samples 1000 disk drives and finds 14 defective units. Which action should the team recommend?
Response:
- A. There is a flaw in the quality assurance process and the sample should be repeated
- B. A smaller sample size should be taken to determine if the plant is operating correctly
- C. A larger sample size should be taken to determine if the plant is operating correctly
- D. The manufacturing process is functioning properly and no further action is required
Answer: D
NEW QUESTION # 132
Consider these itemsets:
(hat, scarf, coat)
(hat, scarf, coat, gloves)
(hat, scarf, gloves)
(hat, gloves)
(scarf, coat, gloves)
What is the confidence of the rule (gloves -> hat)?
Response:
- A. 75%
- B. 66%
- C. 60%
- D. 80%
Answer: A
NEW QUESTION # 133
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