D204 Practice Exam questions and answers A+ grade guaranteed

D204 Practice Exam Terms in this set (60) Which activity does an analyst perform in the discovery phase of the data analytics life cycle? A. Collecting Data B. Cleaning Data C. Identifying Outliers D. Identifying Business Needs CORRECT ANSWER; D In which phase of the data analytics life cycle does an analyst build a histogram? A. Data Acquisition B. Data Exploration C. Discovery D. Predictive Modeling CORRECT ANSWER; B Brainpower Read More An analyst applies a statistical formula to obtain the average temperature for a city over the last 50 years. Which phase of the data analytics life cycle is represented by this activity? A. Data Acquisition B. Exploratory Data Analysis C. Predictive Modeling D. Data Reporting CORRECT ANSWER; B An analyst has been tasked with defining data columns that could contain null values. Which activity of the data acquisition phase is represented? A. Collecting Data B. Disqualifying Data Sources C. Detecting missing values D. Transforming improperly formatted text CORRECT ANSWER; C Which activity in the data analytics life cycle occurs during the data acquisition phase and requires the most time and effort from the data analyst? A. Selecting the data sources B. Importing data into a database C. Cleaning Data D. Defining goals CORRECT ANSWER; C What might be developed by data analysts when acquiring data from a data warehouse? A. The procedures for extracting files form the data warehouse B. The procedures for updating tables in data warehouse C. The relational structure of tables D. The SQL queries of data within the tables CORRECT ANSWER; D What can be identified using a box plot? A. Frequency B. Correlation C. Interquartile range D. Mean CORRECT ANSWER; C What will be a consequence of poor attention to detail during the data exploration phase? A. Not enough variables will be considered in the analysis B. The outcome of the analysis will be misaligned to business needs C. The analyst will lack insight into the structure of the data set D. The model will be built using the wrong data set CORRECT ANSWER; C Which aspect of data exploration occurs when an analyst writes code to compile a bar graph of dog food sales per month? A. Performance of a correlation analysis B. Analysis of data anomalies C. Verification through visualization D. Determination of variabilities CORRECT ANSWER; C An oil company uses robots and sensors to detect how pipeline corrosion changes over time. The collected data is then used in a predictive model that estimates when a pipe should be replaced. How does the predictive model serve this oil company? A. To minimize interruptions from maintenance shutdowns B. To minimize the need for workforce safety trainin