CSC1207 DPV [Chapter 123]

In data processing, what does the term "data cleansing" refer to?

• Creating a backup of the data

• The process of making data dirtier

• Removing errors, inconsistencies, and inaccuracies from the data

• Encrypting the data for security

Which of the following is a key consideration when deciding the appropriate data processing method for a specific task?

• Using the most complex method available

• Minimizing data security measures

• Aligning the method with the specific needs and goals of the task

• Ignoring any existing data processing standards

What is the purpose of data transformation in data processing?

• To create a complete backup of the data

• To change data from one format or structure to another

• To discard data that is not immediately useful

• To store data in its raw, unprocessed form

What is the key challenge in data visualization when dealing with big data?

• Lack of data volume

• Difficulty in data collection

• Overwhelming volume of data and the need to extract meaningful insights

• Lack of visualization tools

Which of the following is an example of structured data?

• A collection of random text files

• A database of customer names and addresses

• Unorganized data scattered across multiple locations

• Social media posts from various users

Which of the following is an example of an unstructured data source?

• Relational databases

• Excel spreadsheets

• Social media posts

• Structured survey responses

What is the primary purpose of data visualization?

• To make data more complex and difficult to understand

• To showcase the designer's artistic skills

• To communicate data and insights effectively

• To entertain and amuse the audience

In data processing, what is data mining primarily used for?

• To extract valuable insights and patterns from large datasets

• To delete unnecessary data

• To create duplicate copies of data

• To transform data into a different format

Which type of data visualization is most suitable for showing trends over time?

• Bar chart

• Scatter plot

• Pie chart

• Line chart

When interpreting a bar chart, what does the length of a bar typically represent?

• Frequency

• Area

• Volume

• Width