What is the role of a data analyst?
What is the role of a data analyst? To query and process data, provide reports, summarize and visualize data. To build and operationalize data pipelines for collecting and organizing data.…
In training a pattern recognition system which data set measures the accuracy achieved by the model?
In training a pattern recognition system which data set measures the accuracy achieved by the model? Model data set Testing data set Sample data set Training data set Answers Explanation…
Which step in the machine learning process transforms data into a structured format by removing missing data and corrupted observations?
Which step in the machine learning process transforms data into a structured format by removing missing data and corrupted observations? Testing data Learning data Preparing data Model evaluation Answers Explanation…
Which method describes how a machine learns using the reinforcement machine learning model?
Which method describes how a machine learns using the reinforcement machine learning model? Autonomously discovering patterns in data. Human interactions to label data read accuracy. Discovering groups of items frequently…
Which machine learning algorithm uses data sets verified by experts as its learning basis?
Which machine learning algorithm uses data sets verified by experts as its learning basis? Association Clustering Routing Supervised Answers Explanation & Hints: The machine learning algorithm that uses data sets…
When several items are grouped, which type of machine learning algorithm can determine which items in the group predict the presence of other items?
When several items are grouped, which type of machine learning algorithm can determine which items in the group predict the presence of other items? Association Classification Clustering Regression Answers Explanation…
What is the correct order of the stages in the data pipeline?
What is the correct order of the stages in the data pipeline? Ingestion, Transformation, Analysis, Storage Ingestion, Analysis, Transformation, Storage Ingestion, Storage, Transformation, Analysis Ingestion, Transformation, Storage, Analysis Answers Explanation…
What big data term includes reducing the amount of data cleaning that is required?
What big data term includes reducing the amount of data cleaning that is required? Volume Variety Velocity Veracity Answers Explanation & Hints: The big data term that includes reducing the…
The four V’s of Big Data are volume, velocity, variety, and veracity. What is meant by variety?
The four V’s of Big Data are volume, velocity, variety, and veracity. What is meant by variety? The volume of data in motion. The amount of data cleaning that is…
An online e-commerce shopping site collects sales data to help improve their operation and profits. Which data type would be used to record the number of products purchased by a customer?
An online e-commerce shopping site collects sales data to help improve their operation and profits. Which data type would be used to record the number of products purchased by a…
A sales department is analyzing the sales trend for one of their best products. They collected quarterly sales number over the past five years and want to plot the data in a graphical format for quick analysis and interpretation. Which one is NOT a good way to visualize?
A sales department is analyzing the sales trend for one of their best products. They collected quarterly sales number over the past five years and want to plot the data…
Which statement is an accurate description of discrete variables?
Which statement is an accurate description of discrete variables? Discrete variables are qualitative and consist of two or more categories in which order matters. They are quantitative with a continuous…
What are two examples of unstructured data? (Choose two.)
What are two examples of unstructured data? (Choose two.) Video content User account data SQL queries Blog entry Customer account spreadsheet Answers Explanation & Hints: Two examples of unstructured data…
What is an example of structured data?
What is an example of structured data? Data entered into spreadsheets Digital photos Content found on web pages Electronic journals Answers Explanation & Hints: An example of structured data would…
What is the only way of ensuring that deleted files on your computer are irrecoverable?
What is the only way of ensuring that deleted files on your computer are irrecoverable? Physically destroying your computer’s hard drive Using a software program such as SDelete or Secure…
How can you prevent others from eavesdropping on network traffic when operating a PC on a public Wi-Fi hotspot?
How can you prevent others from eavesdropping on network traffic when operating a PC on a public Wi-Fi hotspot? Disable Bluetooth Use WPA2 encryption Connect with a VPN service Create…
You are having difficulty remembering passwords for all of your online accounts. What should you do?
You are having difficulty remembering passwords for all of your online accounts. What should you do? Write the passwords down and keep them out of sight Save the passwords in…
You have stored your data on a local hard disk. Which method would secure this data from unauthorized access?
You have stored your data on a local hard disk. Which method would secure this data from unauthorized access? Two factor authentication Duplication of the hard drive Data encryption Deletion…
Which technology removes direct equipment and maintenance costs from the user for data backups?
Which technology removes direct equipment and maintenance costs from the user for data backups? A tape A cloud service Network attached storage An external hard drive Answers Explanation & Hints:…
What is the best method to prevent Bluetooth from being exploited?
What is the best method to prevent Bluetooth from being exploited? Always disable Bluetooth when it is not being used Always use a VPN when connecting with Bluetooth Only use…
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