Each scroll bar includes a scroll box, which indicates the location in a document

What character is used to select all the fields in a table in the Design view of a query?

A) Asterisk character (*) B) Number sign (#) C) At symbol (@) D) Ampersand (&)

Consider two communication services for use in asynchronous distributed systems. In service A, messages may be lost, duplicated or delayed and checksums apply only to headers. In service B, messages may be lost. delayed or delivered too fast for the recipient to handle them, but those that are delivered arrive order and with the correct contents. Describe the classes of failure exhibited by each service. Classify their failures according to their effect on the properties of validity and integrity. Can service B be described as a reliable communication service?

What will be an ideal response?