Options: a. means do not change the value in the primary key field if that record has related records in another table
b. means change all the related records in child tables if the record in parent table is changed
c. Both of above
d. None of above
Options: Ctrl + T
B. Ctrl + E
C. Ctrl + S
D. Ctrl + P
Ans:â€“ D ,
Legacy data is which of the following?
Options: Data contained in a newly-installed system, Data rejected during the installation of a new system, Data contained in a file system, Data contained by a system used prior to the installation of a new system
Which of the following is not an advantage of magnetic disk storage?
Options: The access time of magnetic disk is much less than that of magnetic tape, Â Â Disk storage is longer lasting than magnetic tape, Â Â Disk storage is less expensive than tape storage, Â None of the above
Which one of the following statements is true for current flowing in a parallel circuit?
Options: The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it, The same current always flows through every part of a parallel circuit, The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance, The total current in a parallel circuit is always less than the smallest amount of current