How do you desing a data load that has good performance and deals with interrupted loads in SAP Data services?

You want to back up an SAP Data Services repository. How does the system store repositories?

You create a file format in SAP Data Services
What properties can you set for a column?
Note: There are 3 correct answers to this question.

You are reading a Sales Order table from the source and need to add the customer region information a from a customer table. The primary key of the customer table consists of the columns CUST_ID and VALID_FROM How would you desing the dataflow to get the region information that was valid at the ORDER_CREARTE_DATE?

A target column named ZIP4 requires the input of the source columns: POSTCODE and EXTENSION. For example:
POSTECODE:99999
EXTENSION: 9999
Desired result is ZIP4:99999-9999