Objectives - Database

Data collection methods to gather data from a range of sources include:

• Surveys, interviews, observations, and document analysis

• Only using online surveys

• Guessing based on assumptions

• Ignoring data from external sources

What is data?

• A) A collection of processed facts

• B) A collection of raw or unprocessed facts, opinions, figures, etc., usually in the form of texts, words, images, audio, video, etc

• C) Only numbers and figures

• D) Only images and videos

Which of the following is a primary source of data?

• Internet

• Interviews

• Social Media

• Phone Use

Which of the following is a secondary source of data?

• Experiments

• Measurements

• Social Media

• Observations

Data from the Internet is considered a (a)   source.

• Primary

• Secondary

Which type of data is numeric information that measures value, counts, and is about when, how much, how many, and how often?

• Qualitative Data

• Quantitative Data

• Structured Data

• Unstructured Data

Which type of data is described as data with standardized format for efficient access using software like tables?

• Qualitative Data

• Quantitative Data

• Structured Data

• Unstructured Data

Fill in the blank: ________ is an advantage of a database (DB) that helps organize data efficiently.

• Data normalisation

• Data redundancy

• Data corruption

• Data fragmentation

A data dictionary contains field names, data types, field sizes, and field formats.

• True

• False

What does a data dictionary store?

• Only data values

• Metadata that provides information such as definitions of data items, their relationship, authorisation, and usage statistics

• Only user information

• Only primary keys