CST 8227 Final Exam | Questions and Answers |
2026 Update
CST 8227 Interfacing Final Exam Practice
Section 1: Node-RED Dashboard Fundamentals
1. What is the primary purpose of the Node-RED Dashboard?
A) To write low-level assembly code for microcontrollers
B) To create web-based dashboards for visualizing and controlling hardware
C) To design printed circuit boards for embedded systems
D) To simulate digital logic circuits
Answer: B
Rationale: Node-RED Dashboard provides a set of pre-built UI components that
allow you to quickly and easily create a web-based dashboard for visualizing and
controlling your Node-RED flows .
2. In the Node-RED Dashboard palette, which category contains nodes like
Button, Slider, and Gauge?
A) Layout
B) UI
C) Form
D) Network
*Answer: B
Rationale: The UI category contains the primary user interface components for
building dashboards, including buttons, sliders, gauges, text displays, and charts .
,3. Which Node-RED Dashboard node is used to create a user interface element
that allows adjustment of a numeric value?
A) Button node
B) Slider node
C) Chart node
D) Switch node
*Answer: B
Rationale: A Slider node is designed for adjusting numeric values within a defined
range, commonly used for controls in IoT projects .
4. What is the function of a "Group" node in Node-RED Dashboard?
A) To create a new data flow
B) To organize UI elements into a column or container
C) To connect to a database
D) To send HTTP requests
*Answer: B
Rationale: A Group node organizes UI elements into columns within a page,
making the dashboard more structured and visually appealing .
5. What is the purpose of a "Tab" node in Node-RED Dashboard?
A) To create a new flow
B) To organize groups into separate pages
C) To connect to a remote server
D) To deploy the flow
*Answer: B
Rationale: Tabs organize the dashboard layout into separate pages, allowing
different functions or sections of the dashboard to be structured on distinct
pages .
, 6. Which Node-RED Dashboard node displays data that changes over time as a
line or bar chart?
A) Text node
B) Chart node
C) Gauge node
D) Slider node
*Answer: B
Rationale: A Chart node visualizes data trends over time, generating line charts,
bar charts, or other graphical representations of incoming data .
7. In Node-RED Dashboard, which node displays a circular or linear meter for a
numeric value?
A) Text node
B) Chart node
C) Gauge node
D) Slider node
*Answer: C
Rationale: A Gauge node displays values in a visual format such as a
speedometer-like dial or circular gauge, changing based on incoming data .
8. The ui_template node in Node-RED Dashboard allows:
A) Creating a new data flow
B) Displaying custom HTML content in the dashboard
C) Connecting to a hardware device
D) Generating random data
*Answer: B
Rationale: The ui_template node creates custom UI elements by writing HTML,
2026 Update
CST 8227 Interfacing Final Exam Practice
Section 1: Node-RED Dashboard Fundamentals
1. What is the primary purpose of the Node-RED Dashboard?
A) To write low-level assembly code for microcontrollers
B) To create web-based dashboards for visualizing and controlling hardware
C) To design printed circuit boards for embedded systems
D) To simulate digital logic circuits
Answer: B
Rationale: Node-RED Dashboard provides a set of pre-built UI components that
allow you to quickly and easily create a web-based dashboard for visualizing and
controlling your Node-RED flows .
2. In the Node-RED Dashboard palette, which category contains nodes like
Button, Slider, and Gauge?
A) Layout
B) UI
C) Form
D) Network
*Answer: B
Rationale: The UI category contains the primary user interface components for
building dashboards, including buttons, sliders, gauges, text displays, and charts .
,3. Which Node-RED Dashboard node is used to create a user interface element
that allows adjustment of a numeric value?
A) Button node
B) Slider node
C) Chart node
D) Switch node
*Answer: B
Rationale: A Slider node is designed for adjusting numeric values within a defined
range, commonly used for controls in IoT projects .
4. What is the function of a "Group" node in Node-RED Dashboard?
A) To create a new data flow
B) To organize UI elements into a column or container
C) To connect to a database
D) To send HTTP requests
*Answer: B
Rationale: A Group node organizes UI elements into columns within a page,
making the dashboard more structured and visually appealing .
5. What is the purpose of a "Tab" node in Node-RED Dashboard?
A) To create a new flow
B) To organize groups into separate pages
C) To connect to a remote server
D) To deploy the flow
*Answer: B
Rationale: Tabs organize the dashboard layout into separate pages, allowing
different functions or sections of the dashboard to be structured on distinct
pages .
, 6. Which Node-RED Dashboard node displays data that changes over time as a
line or bar chart?
A) Text node
B) Chart node
C) Gauge node
D) Slider node
*Answer: B
Rationale: A Chart node visualizes data trends over time, generating line charts,
bar charts, or other graphical representations of incoming data .
7. In Node-RED Dashboard, which node displays a circular or linear meter for a
numeric value?
A) Text node
B) Chart node
C) Gauge node
D) Slider node
*Answer: C
Rationale: A Gauge node displays values in a visual format such as a
speedometer-like dial or circular gauge, changing based on incoming data .
8. The ui_template node in Node-RED Dashboard allows:
A) Creating a new data flow
B) Displaying custom HTML content in the dashboard
C) Connecting to a hardware device
D) Generating random data
*Answer: B
Rationale: The ui_template node creates custom UI elements by writing HTML,
