This statement about configuring application access is true. An access group is a rule that defines the roles and permissions that users have in an application. An access group can list more than one role, but the system uses the most restrictive setting when there is a conflict between roles. For example, if one role allows creating a case and another role denies creating a case, the system denies creating a case for users who belong to both roles. Reference: https://community.pega.com/knowledgebase/articles/security/86/access-groups

These two statements about Configuration sets are true. Configuration sets are a unified configuration framework that allows for truly upgradeable and dynamic applications. Configuration sets enable the business to control application behavior by providing low-code options for customizing parameters for application features or specific case types. Configuration sets are used to organize Configuration settings with a common element, such as an application feature or specific case type. Reference: https://academy.pega.com/topic/configuration-sets/v1

To enforce these restrictions when requesting an instant loan, you can use a single Validate rule with two conditions one for income and one for credit card debt. A Validate rule is a rule that tests property values for errors or omissions during case processing. You can define multiple conditions in a Validate rule to check whether the property values meet your business requirements. Reference: https://community.pega.com/knowledgebase/articles/case-management/86/validating-case-data

These two field types are specialized versions of the Query field type. A Query field type allows users to select a value from a list that is populated by running a report definition rule or by referencing another field value rule. A Case reference field type allows users to select an existing case from a list that is populated by running a report definition rule on the Work- class or one of its subclasses. A Data reference field type allows users to select an existing data object from a list that is populated by running a report definition rule on a specific data class. Reference: https://community.pega.com/knowledgebase/articles/user-experience/86/configuring-field-types