Explanation
To achieve the requirement of only single currency journals being entered for this company, you should enable
"Limit a Journal to a Single Currency" on both ledger options and journal sources. Ledger options are settings that apply to a specific ledger, such as journal processing options, currency options, and average balance processing options. Journal sources are identifiers that indicate where a journal originated, such as manual entry, subledger accounting, or import. Youcan enable "Limit a Journal to a Single Currency" on both ledger options and journal sources using the Specify Ledger Options and Manage Journal Sources tasks in Setup and Maintenance. This will enforce single currency journals for journals entered on the Create Journal page and for journals that are imported. You do not need to enable "Limit a Journal to a Single Currency" on journal lookup codes, as these are codes that indicate the status of a journal, such as Entered, Posted, or Reversed. You do not need to enable "Limit a Journal to a Single Currency" on journal category, as this is an attribute that classifies journals by purpose or function, such as Purchase Invoices or Allocations. You do not need to enable "Limit a Journal to a Single Currency" on profile option, as this is a setting that affects the behavior of an application or feature for a user or responsibility. Reference: Oracle Financials Cloud: General Ledger 2022 Implementation Professional Objectives - Define Ledgers 12

Explanation
When balancing an intercompany journal, Oracle Fusion Cloud will first look for a primary balancing segment rule that matches the provider and receiver primary balancing segment values. If such a rule exists, it will be used to generate the intercompany receivables and payables accounts. If not, Oracle Fusion Cloud will look for a chart of accounts rule, then a legal entity-level rule, and finally a ledger-level rule. The primary balancing segment rule has the highest priority and the ledger-level rule has the lowest priority. References:
Overview of Intercompany Balancing Rules
Intercompany Balancing Rules
Troubleshooting Guide For Intercompany Balancing
Example of Generating Intercompany Receivables and Intercompany Payables Accounts

Explanation
According to Oracle documentation3, when using FBDI template to load Chart of Account Mapping Rules for their Primary and Secondary ledgers, you can create, update, and delete account rules for a chart of accounts mapping, and you can create, update, and delete segment rules for a chart of accounts mapping. FBDI enables you to import chart of accounts mapping rules from a spreadsheet template into General Ledger. You can use FBDI to manage both account rules and segment rules for a chart of accounts mapping. Therefore, options C and Dare correct. Option A is incorrect because you can download the template from other pages besides the Manage Chart of Accounts Mappings page. Option B is incorrect because FBDI does not support external integration using REST services.

Explanation
If you use insert in the spreadsheet to load the monthly historical rates by using FBDI, the existing historical rate for a specific ledger, currency, account combination, and accounting period will be replaced by the new rate. This is because the insert action will overwrite the existing rate with the new rate in the GL_HISTORICAL_RATES_INT table. If you want to preserve the existing rate, you should use update or delete actions instead. References:
How Historical Rates Import Data Is Processed, Section: Use the Historical Rates Import file-based data import (FBDI) template to import historical rates from external and legacy sources to Oracle General Ledger Import Historical Rates, Section: Details Entering Historical Rates, Section: Entering Historical Rates

Explanation
Infotiles and infolets are graphical components that display key information and metrics on the General Accounting dashboard. They help users access many sources of information across the enterprise in an efficient, timely, and engaging manner. Infolets can be refreshed to see up-to-date data by clicking the Refresh icon on the infolet. Infotiles have three views: Front view, which shows a summary of the most important information; Back view, which shows additional details and actions; and Expanded view, which shows a full-screen view of the infotile content. References:
Oracle Financials Cloud: Using General Ledger, Chapter 6: Financial Reporting and Analysis, Section:
General Accounting Infolets
Oracle Financials Cloud: Implement General Ledger, Chapter 1: Overview of Oracle Financials Cloud, Section: Overview of Using Infolets to Identify Issues and Prioritize Tasks