Options: Indexes are created to enforce uniqueness on columns., Indexes are created to enable fast retrieval by column values., Columns that are frequently used with equal conditions in WHERE clauses are good candidates for indexes., Indexes are created with the ALTER TABLE command.
When you connect to an online information service, you are asked to provide some kind of identification such as your name, an account number and a password. What is the name given to this brief dialogue between you and the information system?
3.In Microsoft PowerPoint you can embed a Microsoft Word tale in a slide by
Options: (A)Clicking the insert new slide button on the standard toolbar, then double clicking table (B) Clicking the insert Microsoft word table button on the formatting toolbar (C) Clicking the insert Microsoft word table button on the standard toolbar (D) Both (A)and (C) 12
Options: is a hardware memory device which denotes the location of the current instruction being executed., is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory., contains the address of the memory location that is to be read from or stored into., contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
Options: (A)Extent to which a system or component complies with standards (B) Trustworthiness of operating the software. (C) Measures that estimates system cost to operate and maintain (D) None of these 27
Which of the following is correct regarding Aggregate functions?
Options: it takes a list of values and return a single values as result
B. it takes a list of values and return a list of values as result
C. it takes a single value and returns a list of values as result
D. it takes a single value and returns a single value as result
Options: an error-detecting code based on a summation operation performed on the bits to be checked., a check bit appended to an array of binary digits to make the sum of 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 in detected, the ratio of the number of data units in error to the total number of data units
Which statement describes a spanning-tree network that has converged?
Options: All switch and bridge ports are in the forwarding state., All switch and bridge ports are assigned as either root or designated ports., All switch and bridge ports are in either the forwarding or blocking state., All switch and bridge ports are either blocking or looping.