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Question 144/165
A data scientist is asked to implement an article recommendation feature for an on-line magazine. The magazine does not want to use client tracking technologies such as cookies or reading history. Therefore, only the style and subject matter of the current article is available for making recommendations. All of the magazine's articles are stored in a database in a format suitable for analytics.
Which method should the data scientist try first?
Which method should the data scientist try first?
Correct Answer: A
- Question List (165q)
- Question 1: Consider a database with 4 transactions: Transaction 1: {che...
- Question 2: In the MapReduce framework, what is the purpose of the Reduc...
- Question 3: In linear regression, what indicates that an estimated coeff...
- Question 4: In addition to less data movement and the ability to use lar...
- Question 5: The Marketing department of your company wishes to track opi...
- Question 6: Which analytical method is considered unsupervised?...
- Question 7: What does the R code z <- f[1:10, ] do?...
- Question 8: Which characteristic applies only to Business Intelligence a...
- Question 9: Refer to the exhibit. (Exhibit) The graph represents an ROC ...
- Question 10: Which process in text analysis can be used to reduce dimensi...
- Question 11: What is required in a presentation for project sponsors?...
- Question 12: How does Pig's use of a schema differ from that of a traditi...
- Question 13: Refer to the exhibit. (Exhibit) You are using k-means cluste...
- Question 14: Refer to the exhibit (Exhibit) Consider the training data se...
- Question 15: Your company has 3 different sales teams. Each team's sales ...
- Question 16: In which phase of the data analytics lifecycle do Data Scien...
- Question 17: You are using the Apriori algorithm to determine the likelih...
- Question 18: In linear regression modeling, which action can be taken to ...
- Question 19: A data scientist plans to classify the sentiment polarity of...
- Question 20: Refer to the exhibit. (Exhibit) Click on the calculator icon...
- Question 21: You submit a MapReduce job to a Hadoop cluster and notice th...
- Question 22: Trend, seasonal, and cyclical are components of a time serie...
- Question 23: Refer to the exhibit. (Exhibit) Click on the calculator icon...
- Question 24: You are using MADlib for Linear Regression analysis. Which v...
- Question 25: In R, functions like plot() and hist() are known as what?...
- Question 26: Which word or phrase completes the statement? Business Intel...
- Question 27: Which word or phrase completes the statement? A data warehou...
- Question 28: Which activity might be performed in the Operationalize phas...
- Question 29: How are window functions different from regular aggregate fu...
- Question 30: In which lifecycle stage are appropriate analytical techniqu...
- Question 31: In data visualization, what is used to focus the audience on...
- Question 32: Which word or phrase completes the statement? A Data Scienti...
- Question 33: Which key role for a successful analytic project can provide...
- Question 34: A disk drive manufacturer has a defect rate of less than 1.5...
- Question 35: The average purchase size from your online sales site is $17...
- Question 36: What is Hadoop?
- Question 37: What is one modeling or descriptive statistical function in ...
- Question 38: Refer to the exhibit. (Exhibit) You are using K-means cluste...
- Question 39: Refer to the Exhibit. (Exhibit) In the Exhibit, the table sh...
- Question 40: The web analytics team uses Hadoop to process access logs. T...
- Question 41: Refer to the exhibit. (Exhibit) You have run a linear regres...
- Question 42: Which word or phrase completes the statement? Data-ink ratio...
- Question 43: Refer to the exhibit. (Exhibit) You are building a decision ...
- Question 44: You are attempting to find the Euclidean distance between tw...
- Question 45: What is a core deliverable at the end of the analytic projec...
- Question 46: What would be considered "Big Data"?...
- Question 47: You have fit a decision tree classifier using 12 input varia...
- Question 48: You are using k-means clustering to classify heart patients ...
- Question 49: You are provided four different datasets. Initial analysis o...
- Question 50: Consider the example of an analysis for fraud detection on c...
- Question 51: Consider a database with 4 transactions: Transaction 1: {che...
- Question 52: Refer to the exhibit. (Exhibit) You have created a density p...
- Question 53: You have been assigned to do a study of the daily revenue ef...
- Question 54: What is the primary bottleneck in text classification?...
- Question 55: What are the characteristics of Big Data?...
- Question 56: You are analyzing data in order to build a classifier model....
- Question 57: What is an example of a null hypothesis?...
- Question 58: Refer to exhibit. (Exhibit) You are asked to write a report ...
- Question 59: Which method is used to solve for coefficients b0, b1, .., b...
- Question 60: Refer to the Exhibit. (Exhibit) You are working on creating ...
- Question 61: When would you use a Wilcoxson Rank Sum test?...
- Question 62: Which R data structure allows elements to have different dat...
- Question 63: Which graphical representation shows the distribution and mu...
- Question 64: Refer to the exhibit. (Exhibit) The exhibit shows four graph...
- Question 65: Imagine you are trying to hire a Data Scientist for your tea...
- Question 66: Refer to the exhibit (Exhibit) Consider the training data se...
- Question 67: You have two tables of customers in your database. Customers...
- Question 68: Refer to the exhibit. (Exhibit) You have scored your Naive b...
- Question 69: Which word or phrase completes the statement? Business Intel...
- Question 70: What is a property of window functions in SQL commands?...
- Question 71: Refer to the Exhibit. (Exhibit) In the Exhibit, the table sh...
- Question 72: You have completed your model and are handing it off to be d...
- Question 73: Which functionality do regular expressions provide?...
- Question 74: Which word or phrase completes the statement? Mahout is to H...
- Question 75: You have been assigned to run a linear regression model for ...
- Question 76: Refer to the exhibit. (Exhibit) After analyzing a dataset, y...
- Question 77: On analyzing your time series data you suspect that the data...
- Question 78: Which characteristic applies mainly to Data Science as oppos...
- Question 79: What describes a true property of Logistic Regression method...
- Question 80: Consider these itemsets: (hat, scarf, coat) (hat, scarf, coa...
- Question 81: Consider these itemsets: (hat, scarf, coat) (hat, scarf, coa...
- Question 82: Your colleague, who is new to Hadoop, approaches you with a ...
- Question 83: Which data asset is an example of semi-structured data?...
- Question 84: Refer to the exhibit. (Exhibit) You ran a linear regression,...
- Question 85: You have used k-means clustering to classify behavior of 100...
- Question 86: In MADlib what does MAD stand for?...
- Question 87: Refer to the exhibit. (Exhibit) What provides the decision t...
- Question 88: When creating a project sponsor presentation, what is the ma...
- Question 89: Which word or phrase completes the statement? Unix is to bas...
- Question 90: In data visualization, which type of chart is recommended to...
- Question 91: Which word or phrase completes the statement? Emphasis color...
- Question 92: Consider a scale that has five (5) values that range from "n...
- Question 93: In a Student's t-test, what is the meaning of the p-value?...
- Question 94: Which ROC curve represents a perfect model fit? A: (Exhibit)...
- Question 95: What is LOESS used for?
- Question 96: You have been assigned to do a study of the daily revenue ef...
- Question 97: Your colleague, who is new to Hadoop, approaches you with a ...
- Question 98: A data scientist is given an R data frame, "empdata", with t...
- Question 99: For which class of problem is MapReduce most suitable?...
- Question 100: Assume that you have a data frame in R Which function would ...
- Question 101: In the MapReduce framework, what is the purpose of the Map F...
- Question 102: Refer to the exhibit. (Exhibit) In the exhibit, a correlogra...
- Question 103: You are given 10, 000, 000 user profile pages of an online d...
- Question 104: The web analytics team uses Hadoop to process access logs. T...
- Question 105: You have been assigned to do a study of the daily revenue ef...
- Question 106: A disk drive manufacturer has a defect rate of less than 1.0...
- Question 107: What is required in a presentation for business analysts?...
- Question 108: You are studying the behavior of a population, and you are p...
- Question 109: Refer to the exhibit. (Exhibit) Which type of data issue wou...
- Question 110: What does R code nv <- v[v < 1000] do?...
- Question 111: A Data Scientist is assigned to build a model from a reporti...
- Question 112: You are analyzing a time series and want to determine its st...
- Question 113: You are performing a market basket analysis using the Aprior...
- Question 114: Before you build an ARMA model, how can you tell if your tim...
- Question 115: If your intention is to show trends over time, which chart t...
- Question 116: What is the purpose of the process step "parsing" in text an...
- Question 117: Which word or phrase completes the statement? A spreadsheet ...
- Question 118: Your organization has a website where visitors randomly rece...
- Question 119: You have been assigned to run a logistic regression model fo...
- Question 120: When would you use GROUP BY ROLLUP clause in your OLAP query...
- Question 121: Review the following code: SELECT pn, vn, sum(prc*qty) FROM ...
- Question 122: Your customer provided you with 2, 000 unlabeled records and...
- Question 123: A data scientist wants to predict the probability of death f...
- Question 124: What is an appropriate data visualization to use in a presen...
- Question 125: Which SQL OLAP extension provides all possible grouping comb...
- Question 126: Which activity is performed in the Operationalize phase of t...
- 2 commentQuestion 127: You have run the association rules algorithm on your data se...
- Question 128: You do a Student's t-test to compare the average test scores...
- Question 129: Which word or phrase completes the statement? Theater actor ...
- Question 130: What describes a true limitation of Logistic Regression meth...
- Question 131: Which type of numeric value does a logistic regression model...
- Question 132: You are building a logistic regression model to predict whet...
- Question 133: In which lifecycle stage are initial hypotheses formed?...
- Question 134: Refer to the exhibit. (Exhibit) You have plotted the distrib...
- Question 135: Refer to the exhibit. (Exhibit) You are asked to write a rep...
- Question 136: You are asked to create a model to predict the total number ...
- Question 137: Refer to the exhibit. (Exhibit) You are assigned to do an en...
- Question 138: Refer to the exhibit. (Exhibit) Click on the calculator icon...
- Question 139: Refer to the exhibit. (Exhibit) In the exhibit, a correlogra...
- Question 140: Data visualization is used in the final presentation of an a...
- Question 141: What is the mandatory Clause that must be included when usin...
- Question 142: Refer to the exhibit. (Exhibit) In the exhibit, the x-axis r...
- Question 143: You are testing two new weight-gain formulas for puppies. Th...
- Question 144: A data scientist is asked to implement an article recommenda...
- Question 145: Which data type value is used for the observed response vari...
- Question 146: What describes the use of UNION clause in a SQL statement?...
- Question 147: Refer to the Exhibit. (Exhibit) In the Exhibit. For effectiv...
- Question 148: A call center for a large electronics company handles an ave...
- Question 149: What is an appropriate data visualization to use in a presen...
- Question 150: Which key role for a successful analytic project can consult...
- Question 151: When creating a presentation for a technical audience, what ...
- Question 152: Which data asset is an example of quasi-structured data?...
- Question 153: Refer to the exhibit. (Exhibit) Click on the calculator icon...
- Question 154: In which phase of the analytic lifecycle would you expect to...
- Question 155: In which lifecycle stage are test and training data sets cre...
- Question 156: Refer to the exhibit. (Exhibit) You have scored your Naive b...
- Question 157: What is holdout data?
- Question 158: When would you prefer a Naive Bayes model to a logistic regr...
- Question 159: Under which circumstance do you need to implement N-fold cro...
- Question 160: Which of the following is an example of quasi-structured dat...
- Question 161: Data visualization is used in the final presentation of an a...
- Question 162: While having a discussion with your colleague, this person m...
- Question 163: What is the format of the output from the Map function of Ma...
- Question 164: Since R factors are categorical variables, they are most clo...
- Question 165: Which word or phrase completes the statement? Structured dat...
