You can unlock all interviews questions and get access to additional questions that may be added in the future by purchasing a 30 day (monthly) subscription. The subscription costs USD 9.99 (or local equivalent) per month.
The payment will be charged to your iTunes account at confirmation of purchase and the subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal within 24-hours prior to the end of the current period, at the subscription price option you have previously selected.
Your subscription can be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase (Settings > App and iTunes Store > Apple ID > View Apple ID). If you cancel after your subscription has activated, you won’t be refunded for the remaining active period of the subscription.