Please visit trailhead to know what's new in Winter 20 and maintain your Salesforce Administrator Certification by Completing the quiz in first section and a simple hands on for the final section.
For the first part, please find the quiz solution below:
1. When including a Visualforce page component in a Lightning Page using Lightning App Builder, which action hides the default label for the Visualforce page?
Toggle the Label flag to Off
Deselect the Show Label option
Clear the Description field for the component
Visualforce label are hidden by default when using Lightning App Builder
2. A developer needs to make changes to a custom field and associated Apex classes and triggers. How can the developer quickly determine which Apex classes and triggers use the field
Run a report on the custom field
Use the new ApexSettings metadata field
Access the System Overview information from Setup
On the custom field's detail page, click Where is this used?
3. A developer is preparing to install a managed package that will create several new custom objects. What should the developer do to understand how many objects can be created prior to reaching the allowed limit for the org?
Run a report to show the number of active custom objects in the org
Select Custom Objects from the dropdown menu in Schema Builder to see the number of custom objects
Look at the number of custom objects and custom settings in the System Overview information
Determine the difference between 2500, the maximum number of custom objects and the number of custom objects that currently exists in the org.
4. Which ApexSettings metadata field enables serial execution of Apex tests?
enableGaplessTest
enableSerialApexTesting
enableParallelApexTesing
enableDisableParallelApexTesting
5. With the Winter '20 release, which type of callout is now excluded from the concurrent long-running request limit?
SOQL
Apex triggers
API calls to an Apex class
Apex code that sends an HTTP request
2nd Part : Creating Custom Tabs for Lightning Web Components :
copy this package installation link and install it in your trailhead playground. After installation, lightning web component myComponent will be automatically available in the org. After that just create a custom tab Words for myComponent.