Which one of the following is true regarding VLANs?
Options: Two VLANs are configured by default on all Cisco switches., VLANs only work if you have a complete Cisco switched internetwork. No off-brand switches are allowed., You should not have more than 10 switches in the same VTP domain., VTP is used to send VLAN information to switches in a configured VTP domain.
Indicate which, of the following, in not true about an interpreter
Options: Interpreter generates an object program from the source program, Interpreter is a kind of translator, Interpreter analyses each source statement every time it is to be executed, All of the above
Options: is used to set upper and lower limits on numeric data, requires the use of passwords to prohibit unauthorized access to the file, has the data dictionary keep the date and time of last access last back-up, and most recent modification for all files, All of the above
Which of the following is not likely to occur in the near future?
Options: the presidential election will be done by pushing buttons at home., the political issue of establishing an information-assistance program will be raised., most workers will choose working at hoe, so the traditional workplace will disappear, automation will reduce job opportunities, thus resulting in a lower standard of living.
Options: a set of physical layer standards developed by EIA and intended to replace RS-232-C., a check bit appended to an array of binary digits to make the sum of the all the binary digits, a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression the resulting expression will not conform to the rules of construction and thus the presence of the errors is detected, the ratio of the number of data units in error to the total number of data units
Which one of the following statements most accurately reflects the nature of ac power?
Options: The current in an ac circuit flows in one direction, but changes value periodically, The current in an ac circuit flows in one direction at a steady level, The current in an ac circuit changes direction periodically, The current in an ac circuit flows in two directions at the same time