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Exam Code:	D-DS-FN-23
Exam Name:	Dell Data Science Foundations
Certification Provider:	EMC
Free Question Number:	147
Version:	v2025-11-26
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# of Questions views:	1639
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Exam Question List: Question 1: What is a motivation for using a data analytics lifecycle?...; Question 2: You have created a Logistic Regression model to predict cust...; Question 3: Your organization has a website where visitors randomly rece...; Question 4: What is a business driver for Big Data analytics adoption?...; Question 5: You have been assigned to run a logistic regression model fo...; Question 6: In MADlib what does MAD stand for?...; Question 7: Which process in text analysis can be used to reduce dimensi...; Question 8: Since R factors are categorical variables, they are most clo...; Question 9: You have been assigned to run a linear regression model for ...; Question 10: In which lifecycle stage are initial hypotheses formed?...; Question 11: What is the similarity between the matrix and array data str...; Question 12: Which activity is performed in the Operationalize phase of t...; Question 13: Which participant in a data analytics project is typically r...; Question 14: What is an appropriate data visualization to use in a presen...; Question 15: After running a density plot you realize that the data has a...; Question 16: You have run the association rules algorithm on your data se...; Question 17: While having a discussion with your colleague, this person m...; Question 18: Refer to the exhibit. (Exhibit) You are using K-means cluste...; Question 19: Before building an ARMA model, how can you determine if the ...; Question 20: The web analytics team uses Hadoop to process access logs. T...; Question 21: Refer to the exhibit. (Exhibit) You are using k-means cluste...; Question 22: What requests resources from YARN during a MapReduce job?...; Question 23: When would you use GROUP BY ROLLUP clause in your OLAP query...; Question 24: After which phase of the data analytics lifecycle should you...; Question 25: What does the Receiver Operating Characteristic (ROC) curve ...; Question 26: Consider a database with the following four transactions: Tr...; Question 27: The web analytics team uses Hadoop to process access logs. T...; Question 28: What does the R code z <- f[1:10, ] do?...; Question 29: Refer to the exhibit. (Exhibit) You are building a decision ...; Question 30: Which chart type is the most effective way to show trends ov...; Question 31: Which two analytical methods can be used for dealing with ca...; Question 32: A call center for a large electronics company handles an ave...; Question 33: You are asked to create a model to predict the total number ...; Question 34: (Exhibit) Refer to the exhibit. To predict whether or not a ...; Question 35: What is a key consideration when preparing a presentation in...; Question 36: Consider the following SQL statement: SELECT employee_id, ye...; Question 37: You have been assigned to perform a study of the daily reven...; Question 38: You need to run a hypothesis test across three normally dist...; Question 39: Which word or phrase completes the statement; "Excessive emp...; Question 40: Refer to the exhibit. (Exhibit) What is the approximate R-sq...; Question 41: What is part of the model output for a linear regression?...; Question 42: You submit a Map Reduce job to a Hadoop cluster. However, yo...; Question 43: When is the GROUP BY ROLLUP clause used in an OLAP query?...; Question 44: A data scientist is given an R data frame, "empdata", with t...; Question 45: In a Student's t-test, what is the meaning of the p-value?...; Question 46: You are analyzing a time series and want to determine its st...; Question 47: What is the purpose of applying the naive Bayes conditional ...; Question 48: How is HDFS defined?; Question 49: What is one modeling or descriptive statistical function in ...; Question 50: In time series analysis, what function is examined to identi...; Question 51: What describes the data repository represented by the 'A' in...; Question 52: Which R data structure allows elements to have different dat...; Question 53: Which chart type is intended to display correlations between...; Question 54: Which word or phrase completes the statement? Business Intel...; Question 55: In logistic regression modeling, what is the commonly assign...; Question 56: Refer to the exhibit. (Exhibit) You have scored your Naive b...; Question 57: What is the output of the K-means clustering algorithm?...; Question 58: What is a characteristic of an analytic sandbox?...; Question 59: In text analysis, what makes the corpus representation dynam...; Question 60: A data scientist plans to classify the sentiment polarity of...; Question 61: Refer to the exhibit. (Exhibit) The graph represents an ROC ...; Question 62: When creating a project sponsor presentation, what is the ma...; Question 63: (Exhibit) Refer to the exhibit. What is the approximate R-sq...; Question 64: You have run a Linear Regression model on the data shown in ...; Question 65: A data scientist is given an R data frame (i.e., empdata) wi...; Question 66: You have been assigned to run a Logistic Regression model fo...; Question 67: A data scientist is asked to implement an article recommenda...; Question 68: Which phase of the data analytic lifecycle includes conducti...; Question 69: Refer to the exhibit. (Exhibit) After analyzing a dataset, y...; Question 70: What is the format of the output from the Map function of Ma...; Question 71: Refer to the exhibit. (Exhibit) What provides the decision t...; Question 72: Refer to the exhibit. (Exhibit) In the exhibit, a correlogra...; Question 73: In time series analysis, what statement describes a MA(q) pr...; Question 74: The graphic shows the values for the input Boolean attribute...; Question 75: If your intention is to show trends over time, which chart t...; Question 76: In ANOVA, what is the null hypothesis for k population means...; Question 77: MapReduce is designed to process data in which way?...; Question 78: Data has been collected on visitors' viewing habits at a ban...; Question 79: The graph represents the plot of WSS as a function of K for ...; Question 80: What is the primary role of a business intelligence analyst ...; Question 81: Which data type value is used for the observed response vari...; Question 82: Which word or phrase completes the statement? Unix is to bas...; Question 83: Which SQL OLAP extension provides all possible grouping comb...; Question 84: You are assigned the task of creating customer profiles for ...; Question 85: What action occurs during feature selection in the model bui...; Question 86: Executives want to determine whether a change in a shopping ...; Question 87: In a t-test with unknown variance, what values are used to c...; Question 88: A logistic regression model is built to determine the probab...; Question 89: What metrics are used to help calculate relevance in text an...; Question 90: Which component of a final presentation focuses on how to de...; Question 91: In which programming language is Hadoop written?...; Question 92: Which analytic technique would be appropriate to estimate bl...; Question 93: You have fit a decision tree classifier using 12 input varia...; Question 94: What converts SQL-like commands into either Tez, Spark, or M...; Question 95: A fair six-sided die is rolled. Let A denote the event that ...; Question 96: Based on the exhibit, the table shows the values for the inp...; Question 97: Which characteristic applies mainly to Data Science as oppos...; Question 98: You have been assigned to do a study of the daily revenue ef...; Question 99: What is a key consideration when preparing a presentation in...; Question 100: Which Hadoop service responds to requests for compute and me...; Question 101: In addition to quantitative and technical skills, what is a ...; Question 102: What is a core deliverable at the end of the analytic projec...; Question 103: Trend, seasonal, and cyclical are components of a time serie...; Question 104: What is a distinct property of Logistic Regression compared ...; Question 105: In a Logistic Regression, the coefficient for "age" equals -...; Question 106: In data visualization, what is used to focus the audience on...; Question 107: The average purchase size from your online sales site is $17...; Question 108: There are three criterions for big data analytics projects w...; Question 109: Consider this SQL statement: SELECT product, prod_cost, avg(...; Question 110: You are using k-means clustering to classify heart patients ...; Question 111: Refer to the exhibit. (Exhibit) Click on the calculator icon...; Question 112: Refer to the exhibit. (Exhibit) You are asked to write a rep...; Question 113: What is the primary bottleneck in text classification?...; Question 114: Which activity might be performed in the Operationalize phas...; Question 115: An IT department deployed a spam filter to reduce the amount...; Question 116: Which function shown in the exhibit is used to calculate the...; Question 117: Which statement about linear regression is correct?...; Question 118: You have been assigned to do a study of the daily revenue ef...; Question 119: Refer to the exhibit. (Exhibit) In the exhibit, a correlogra...; Question 120: Refer to exhibit. (Exhibit) You are asked to write a report ...; Question 121: What are two data categories that represent quantitative dat...; Question 122: Refer to the exhibit. (Exhibit) In association rules, for it...; Question 123: Which activity is performed in the Operationalize phase of t...; Question 124: You are provided with a dataset with the following attribute...; Question 125: Match each task to its description. (Exhibit)...; Question 126: Consider the following text: "Stop!" he shouted. "Don't go t...; Question 127: Which graphical representation shows the distribution and mu...; Question 128: You are having a discussion with a business colleague. The c...; Question 129: Assume that you have a data frame in R. Which function would...; Question 130: A data scientist wants to predict the probability of death f...; Question 131: You have been given a task to improve sales force compensati...; Question 132: What are the two data categories that represent qualitative ...; Question 133: Which functionality do regular expressions provide?...; Question 134: Consider the example of an analysis for fraud detection on c...; Question 135: Which data asset is an example of semi-structured data?...; Question 136: Which analytical method is considered unsupervised?...; Question 137: How does an HBase data structure differ from an ANSI standar...; Question 138: What provides the means for matching and manipulating text s...; Question 139: What is the optimal usage scenario for the Hadoop Distribute...; Question 140: You have created a scatterplot of two continuous variables f...; Question 141: Your customer provided you with 2, 000 unlabeled records and...; Question 142: You have been assigned to do a study of the daily revenue ef...; Question 143: What is a consideration when building decision trees?...; Question 144: What are challenges presented by Big Data?...; Question 145: You have two tables of customers in your database. Customers...; Question 146: Which visualization technique should be avoided?...; Question 147: Consider the following text: "Aren't you glad that there are...

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