A Backstage admin wants to add a 'Last updated' timestamp to the header of a custom entity page. They have located the component that renders the header. What is the most appropriate way to implement this change using Backstage's core APIs?

Read the timestamp from the window.location query parameters that the catalog page passes to the component.

Use the useApi hook to call the CatalogClient directly and fetch the entity by its name.

Import useEntity from @backstage/plugin-catalog-react and render the entity's metadata.updatedAt field in the header.

Hardcode the timestamp in the component's JSX after checking the entity's YAML file.

When editing a React component in a Backstage app, which part of the component file defines the UI structure that will be rendered?

The import statements at the top of the file

The JSX returned by the component function

The component's props type definition

To integrate a new React component into a Backstage app page, where do you typically add the component's JSX tag?

In the `catalog-info.yaml` under `spec`

In the `app-config.yaml` under the `layout` section

In the `package.json` file under `scripts`

In the JSX of the page component that should display it

Certified Backstage Associate (CBA)

Domain 4Objective 3

Make Changes to React Code in Backstage App CBA Practice Questions (Page 1)

Part of the Customizing Backstage domain, which accounts for 32% of the CBA exam. Linux Foundation does not publish an official question count, but from its 90-minute exam (~35–60 total, ~11–19 in this domain), expect 3–5 from this objective — we provide 23 practice questions to prepare you well beyond it. (estimate)

23questions here

5free pages

6concepts

32%of the exam

Questions 1–5

1application · medium
A Backstage admin wants to add a 'Last updated' timestamp to the header of a custom entity page. They have located the component that renders the header. What is the most appropriate way to implement this change using Backstage's core APIs?
Select an answer first
2foundation · easy
When editing a React component in a Backstage app, which part of the component file defines the UI structure that will be rendered?
Select an answer first
3foundation · easy
To integrate a new React component into a Backstage app page, where do you typically add the component's JSX tag?
Select an answer first
4foundation · easy
Which Backstage React hook is used to access the current theme in a component?
Select an answer first
5foundation · easy
Which file in a Backstage app's `packages/app/src` directory is the main entry point that renders the root `App` component?
Select an answer first

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Make Changes to React Code in Backstage App CBA Practice Questions (Page 1)

Questions 1–5

A Backstage admin wants to add a 'Last updated' timestamp to the header of a custom entity page. They have located the component that renders the header. What is the most appropriate way to implement this change using Backstage's core APIs?

When editing a React component in a Backstage app, which part of the component file defines the UI structure that will be rendered?

To integrate a new React component into a Backstage app page, where do you typically add the component's JSX tag?

Which Backstage React hook is used to access the current theme in a component?

Which file in a Backstage app's `packages/app/src` directory is the main entry point that renders the root `App` component?

Keep studying — Customizing Backstage