Wrong.

Users can set their own Time Zone, Default Time Zone can be set in Setup > Company Information, and Time and Date fields are displayed according to Time Zone settings.

Link to Salesforce help : Time Zones

Wrong.

You can add macros to the Utility Bar in order to automate repetitive tasks. In Lightning Experience, you can use the Macro Builder to create macros.

Macros have to be added to the Utility Bar before being able to create macros.

Link to Salesforce help : Set Up and Use Macros

Wrong.

You can create up to 25 roll-up summary fields on the same object. If needed, you can contact Salesforce Support to increase this number to 40.

Link to Salesforce Help : Custom Fields Allowed Per Object

Wrong.

Change sets can be used to deploy metadata from one org to a related org : production to sandbox, sandbox to production or sandbox to sandbox.
A deployment requires inbound (received in the target org) and outbound (created in the source org) change sets.

To make sure that there’s no error, it is possible (but not mandatory) to validate an inbound change set before deployment.
A change sets limitation is that they can’t delete or rename components.

Link to Salesforce Help : Change Sets

Wrong.

A good way to help sales rep to have access to relevant informations is to enable the News feature (Setup > Account Settings > Enable News).

Wrong.

Newly created fields are automatically added to standard report types, and the option Auto add new custom fields to custom report type layouts (Setup > Reports and Dashboards Settings) can be enabled in order to automatically add newly created fields to custom report types.

Wrong.

“Allow in Chatter Groups” setting needs to be enabled for a custom object to be added to a group. You can’t add records to groups that allow customers.

Not every standard objects can be added to a group, and any number of records can be added to a group.

Link to Salesforce Help : Make Records Available in Chatter Groups

Wrong.

In this case you can just use standard fiscal year and select march as start month. You don’t need custom fiscal year when the business year of the company follows the gregorian calendar (12 months calendar).

Link to Salesforce help : Fiscal Year

Wrong.

The 3 types of access you can grant to report folders are Viewer access, Editor access and Manager access.

Link to Salesforce help : Access Levels for Reports and Dashboards Folders

Wrong.

Organization-Wide Sharing Defaults are used to set the default level of access for users to records that they do not own.

Link to Salesforce Help : Defaults Organization-Wide Access Levels