<type name="Magento\AuthorizenetAcceptjs\Block\Info">
    <arguments>
        <argument name="data" xsi:type="array">
            <item xsi:type="string" name="is_secure_mode">
                1
            </item>
        </argument>
    </arguments>
</type>

This is a type configuration.

This configuration is for the frontend area. This is the area that corresponds with the cart sub-application.

This configuration tells the Object Manager that when a user wants a Magento\AuthorizenetAcceptjs\Block\Info object that the following arguments should be used in the foo object's constructor.

• $data = [...items...];

<virtualType name="AuthorizenetAcceptjsInfoBlock"
             type="Magento\AuthorizenetAcceptjs\Block\Info">
    <arguments>
        <argument name="config" xsi:type="object">
            Magento\AuthorizenetAcceptjs\Gateway\Config
        </argument>
    </arguments>
</virtualType>

This is a virtual type configuration.

This configuration is for the base area. Base area configurations will apply to all the sub-applications.

This virtualType configuration tells the Object Manager when a user wants a virtual AuthorizenetAcceptjsInfoBlock object that it should return a Magento\AuthorizenetAcceptjs\Block\Info object.

This configuration tells the Object Manager that when a user wants a AuthorizenetAcceptjsInfoBlock object that the following arguments should be used in the foo object's constructor.

• $config = new Magento\AuthorizenetAcceptjs\Gateway\Config (...)