IT Questions Flashcards
Mainframe computer systems include several advanced processing procedures. Two of the most common processing procedures are multiprocessing and multiprogramming. Which of the following statements about these processing procedures is false?
A.
Multiprocessing usually involves two or more computers functioning simultaneously.
B.
Multiprogramming allows multiple programs to be executed at exactly the same time.
C.
Multiprogramming switches back and forth between programs during processing.
D.
Multiprocessing allows the sharing of a central memory during processing.
Multiprocessing involves the simultaneous execution of two or more tasks, usually by using two or more processing units that are part of the same system (with a single central memory). Multiprogramming is the appearance of simultaneous execution of two programs as a single processing unit switches back and forth between the programs. Thus, the statement, “Multiprogramming allows multiple programs to be executed at exactly the same time,” is false.
Devices that are used only to perform sequential file processing will not permit:
A.
data to be edited on a separate computer run.
B.
data to be edited in an offline mode.
C.
batch processing to be initiated from a terminal.
D.
data to be edited on a real-time basis.
D.
Using a sequential file organization, data is placed in the file using a key or code for sequencing. Sequential data can only be accessed after all preceding data records have been passed.
Hence, it is impossible to edit the data on a real-time basis.
Which of the following is the primary advantage of using a value-added network (VAN)?
A.
It provides confidentiality for data transmitted over the Internet.
B.
It provides increased security for data transmissions.
C.
It is more cost effective for the company than transmitting data over the Internet.
D.
It enables the company to obtain trend information on data transmissions.
Value-added networks (VANs) are telecommunication networks providing communication facilities, enhancing basic telecommunication services by passing, storing, and converting messages using enhanced security techniques.
“It provides confidentiality for data transmitted over the Internet” is incorrect because many VANs use private networks instead of the public Internet. “It is more cost effective for the company than transmitting data over the Internet” is false because the use of a VAN comes at additional cost above that for using the Internet. “It enables the company to obtain trend information on data transmissions” is false because, although a VAN may supply trend information on data transmissions, that is not a primary advantage of using a VAN.
