Salesforce JavaScript Developer Practice Exam 2025 – Comprehensive Test Prep

In Lightning Web Components (LWC), passing data from a parent component to a child component is achieved through property binding. This process involves defining properties in the child component that can receive data from the parent. When the parent component’s template is written, it can directly bind its attributes to these properties. This establishes a one-way data flow, allowing the child component to utilize and display the data defined in the parent.

When using property binding, the parent component can pass primitives and referenced values to the child’s public properties, making it straightforward to share data. The child component can then access these properties using `this.propertyName`, enabling it to react to changes and re-render as necessary. This binding not only ensures the child receives initial values but also updates dynamically if the parent values change.

In contrast, the other options involve either incorrect methods or communication that doesn’t directly suit this specific task of passing data from parent to child. Therefore, defining properties on the child component and binding them in the parent component's template is the correct and most straightforward approach for this use case in LWC.