Which of the following are integrity controls that a DBMS may support?
Options: Assume a default value in a field unless a user enters a value for that field., Limit the set of permissible values that a field may assume., Limit the use of null values in some fields., All of the above.
Options: running the system with line data by the actual user, making sure that the new programs do in fact process certain transactions according to Specifications, is checking the logic of one or more programs in the candidate system, testing changes made in an existing or a new program
Which statements are true regarding ICMP packets? They acknowledge receipt of a TCP segment. They guarantee datagram delivery. They can provide hosts with information about network problems. They are encapsulated within IP datagrams.
What is the difference between ‘Open’ and ‘Open Exclusively’?
Options: a. Open statement opens access database files and Open Exclusively opens database files of other program like Oracle
b. Open Exclusive locks whole database so that no one can access it whereas Open locks only the record that is being accessed
c. Both Open and Open Exclusively are same
d. Open Exclusive command does not exist in MS Access