合格させるEMC D-DS-FN-23試験最速合格
準備D-DS-FN-23問題解答でD-DS-FN-23試験問題集
質問 # 38
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?
- A. Discriminant Analysis
- B. Linear Regression
- C. Logistic Regression
- D. Association Rules
正解：C
質問 # 39
What is the primary bottleneck in text classification?
- A. The ability to parse unstructured text data.
- B. The high dimensionality of text data.
- C. The fact that text corpora are dynamic.
- D. The availablilty of tagged training data.
正解：D
質問 # 40
What are considerations in a data science and Big Data analytics project?
- A. Analysis flexibility and decision making
- B. Ignoring executive stakeholders and business users
- C. Applying the latest technologies to demonstrate technical skills
- D. Building data silos and bypassing data privacy rules
正解：A
質問 # 41
In which lifecycle stage are initial hypotheses formed?
- A. Model planning
- B. Data preparation
- C. Model building
- D. Discovery
正解：D
質問 # 42
Consider a scale that has five (5) values that range from "not important" to "very important".
Which data classification best describes this data?
- A. Ordinal
- B. Real
- C. Nominal
- D. Ratio
正解：A
質問 # 43
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?
- A. Chukwa
- B. Scribe
- C. Sqoop
- D. Pig
正解：C
質問 # 44
How does an HBase data structure differ from an ANSI standard relational database management system (RDBMS)?
- A. HBase supports a single table with no implicit join ability to other tables; ANSI standard RDBMS supports multiple tables with join ability
- B. HBase is challenged by sparse data;
ANSI standard RDBMS handles missing values well by using null fields - C. HBase has strongly defined data columns;
ANSI standard RDBMS is more flexible with column definitions - D. HBase provides a wider variety of predefined data types for data;
ANSI standard RDBMS provides less variety
正解：A
質問 # 45
What is the optimal usage scenario for the Hadoop Distributed File System?
- A. Large files and high throughput
- B. Large files and low latency
- C. Small files and low latency
- D. Small files and high throughput
正解：A
質問 # 46
Refer to the exhibit.
In the exhibit, a correlogram is provided based on an autocorrelation analysis of a sample dataset.
What can you conclude from only this exhibit?
- A. Lag 7 has a significant negative autocorrelation
- B. There is significant autocorrelation through lag 3
- C. There is no structure left to model in the data
- D. Differencing is required before proceeding with any analysis
正解：B
質問 # 47
Refer to the Exhibit.
In the Exhibit, the table shows the values for the input Boolean attributes "A", "B", and "C". It also shows the values for the output attribute "class".
Which decision tree is valid for the data?
- A. Tree C
- B. Tree A
- C. Tree B
- D. Tree D
正解：C
質問 # 48
What is an appropriate assignment for a data scientist?
- A. Conduct customer surveys
- B. Develop predictive models
- C. Define an OLAP database schema
- D. Monitor key performance indicators
正解：B
質問 # 49
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?
- 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. 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 - a different analytical model should be attempted
正解：B
質問 # 50
You are assigned the task of creating customer profiles for your company. In your database, you have
25 key input variables that come together to define 2,500 customers. You decide to run a K-means cluster analysis on the 25 input variables based on k=4 to build your profiles.
Your analysis resulted in four cluster populations:
Cluster A=1,000 customers
Cluster B=560 customers
Cluster C=925 customers
Cluster D=15 customers
What should be attempted first to more evenly distribute the customer population across clusters?
- A. Reduce K from 4 to 3
- B. Remove some of the input variables from the analysis
- C. Increase K from 4 to 5
- D. Remove the 15 customers in Cluster D from the population
正解：A
質問 # 51
In a t-test with unknown variance, what values are used to calculate the t-statistic?
- A. Mean, sample standard deviation, and population size
- B. Mean, standard deviation, and population size
- C. Sample mean, standard deviation, and sample size
- D. Sample mean, sample standard deviation, and sample size
正解：D
質問 # 52
Which R data structure allows elements to have different data types?
- A. Vector
- B. List
- C. Matrix
- D. Array
正解：B
質問 # 53
What is a key consideration when preparing a presentation intended for sponsors?
- A. Describe how to implement the model
- B. Provide details on model planning and building
- C. Describe how current processes may be affected
- D. Emphasize the business benefits of implementing the model
正解：D
質問 # 54
......
リアルEMC D-DS-FN-23試験問題 [更新されたのは2024年]：https://jp.fast2test.com/D-DS-FN-23-premium-file.html
無料D-DS-FN-23試験問題集には合格させるお手軽に試験合格：https://drive.google.com/open?id=1yUTR96Zq3RrBdrDgXKcUyDufPDTVRtzt