DEA-7TT2無料更新100%試験合格率保証 [2025]
[2025年03月] 認証されたEMC試験問題集でDEA-7TT2試験学習ガイド
EMC DEA -7TT2（アソシエイトデータサイエンスおよびビッグデータ分析V2）認定試験は、Dell EMCが提供するグローバルに認められた認定プログラムです。この認定は、データサイエンスとビッグデータ分析の分野での専門知識を証明したい専門家向けに設計されています。認定試験は、最新の業界動向と技術に基づいており、曲線の先を行くことを望む専門家にとって非常に関連性が高く価値があります。
EMC DEA-7TT2試験は、データサイエンスやビッグデータ分析のキャリアを追求したい個人に適しています。この認定は、データサイエンティスト、データアナリスト、ビジネスアナリスト、ソフトウェア開発者など、IT業界で働くプロフェッショナルにとって有益です。この認定は、候補者の知識やスキルを検証し、彼らを組織にとってより雇用可能で価値ある人材にすることができます。
EMC DEA-7TT2試験は、データサイエンスとビッグデータ分析のキャリアを追求することに興味がある専門家向けです。この試験は、分野の知識とスキルを検証したいと考えているデータアナリスト、データ科学者、およびビッグデータの専門家に適しています。また、キャリアの見通しを強化し、現在の役割を前進させようとしている専門家にとっても素晴らしい機会です。
質問 # 51
You are performing a market basket analysis using the Apriori algorithm. Which measure is a ratio describing the how many more times two items are present together than would be expected if those two items are statistically independent?
Response:
- A. Leverage
- B. Lift
- C. Confidence
- D. Support
正解：B
質問 # 52
If distributed Item-based Collaborative Filtering is an algorithm supported by Mahout, what is the use case category of the algorithm?
Response:
- A. Recommenders
- B. Frequent Itemset
- C. Classification
- D. Clustering
正解：A
質問 # 53
Which word or phrase completes the statement? Theater actor is to "Artistic and Expressive" as Data Scientist is to __________ Response:
- A. "Introverted and Technical"
- B. "Independent and Intelligent"
- C. "Logical and Steadfast"
- D. "Communicative and Collaborative"
正解：D
質問 # 54
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. 66%
- B. 75%
- C. 80%
- D. 60%
正解：B
質問 # 55
When creating a project sponsor presentation, what is the main objective?
Response:
- A. Clearly describe the methods and techniques used
- B. Show how well the model will meet the SLA (service level agreement)
- C. Show how you met the project goals
- D. Show that you met the project goals
正解：D
質問 # 56
You have two tables of customers in your database. Customers in cust_table_1 were sent an e-mail promotion last year, and customers in cust_table_2 received a newsletter last year.
Customers can only be entered in once per table. You want to create a table that includes all customers, and any of the communications they received last year.
Which type of join would you use for this table?
Response:
- A. Inner join
- B. Cross join
- C. Left outer join
- D. Full outer join
正解：D
質問 # 57
Refer to the exhibit.
In the exhibit, the x-axis represents the derived probability of a borrower defaulting on a loan. Also in the exhibit, the pink represents borrowers that are known to have not defaulted on their loan, and the blue represents borrowers that are known to have defaulted on their loan.
Which analytical method could produce the probabilities needed to build this exhibit?
Response:
- A. Linear Regression
- B. Discriminant Analysis
- C. Logistic Regression
- D. Association Rules
正解：C
質問 # 58
You have been assigned to run a logistic regression model for each of 100 countries, and all the data is currently stored in a PostgreSQL database. Which tool/library would you use to produce these models with the least effort?
Response:
- A. RStudio
- B. HBase
- C. Mahout
- D. MADlib
正解：D
質問 # 59
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 - a different analytical model should be attempted
- B. Variables A, B, and C are significantly impacting sales, but are not effectively estimating sales
- C. Variables A, B, and C are significantly impacting sales and are effectively estimating sales
- D. 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
正解：B
質問 # 60
Which word or phrase completes the statement; "A theater actor is to 'artistic and expressive' as a data scientist is to."?
Response:
- A. Introverted and technical
- B. Logical and steadfast
- C. Independent and intelligent
- D. Communicative and collaborative
正解：D
質問 # 61
What is LOESS used for?
Response:
- A. It is a significance test for the correlation between two variables.
- B. It plots a continuous variable versus a discrete variable, to compare distributions across classes.
- C. It is run after a one-way ANOVA, to determine which population has the highest mean value.
- D. It fits a smoothed curve to scatterplot data, to give a general sense of the data,s behavior.
正解：D
質問 # 62
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 (hat, scarf) => gloves?
Response:
- A. 40%
- B. 66%
- C. 60%
- D. 50%
正解：B
質問 # 63
Which Hadoop service is responsible for requesting resources for, and monitoring the completion of, MapReduce processes?
Response:
- A. Application Master
- B. Application Manager
- C. NameNode
- D. DataNode
正解：A
質問 # 64
Data visualization is used in the final presentation of an analytics project. For what else is this technique commonly used?
Response:
- A. Descriptive statistics
- B. Model selection
- C. ETLT
- D. Data exploration
正解：D
質問 # 65
Consider the example of an analysis for fraud detection on credit card usage. You will need to ensure higher-risk transactions that may indicate fraudulent credit card activity are retained in your data for analysis, and not dropped as outliers during pre-processing.
What will be your approach for loading data into the analytical sandbox for this analysis?
Response:
- A. OLTP
- B. ETL
- C. ELT
- D. EDW
正解：C
質問 # 66
What is the output of the K-means clustering algorithm?
Response:
- A. Centroid positioning and entropy of each record in each cluster
- B. Two dimensional representation of the data and the clusters
- C. Intercept and coefficients for each input variable in the dataset
- D. Center of each discovered cluster and mapping of each record to a cluster
正解：D
質問 # 67
What is a motivation for using a data analytics lifecycle?
Response:
- A. Guarantees a successful project
- B. Limits the amount of data needed
- C. Explores all possible approaches
- D. Creates a repeatable process
正解：D
質問 # 68
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