While working with MS-DOS, which command is used to compare the disk in drive A with the disk in drive B, specifying to compare only first side of each disk, and only the first 8 sectors of each track?
Options: (A)Is a low percentages of number of records added or deleted from a file (B) If high, reduces processing efficiency for sequential and non sequential files (C) Is a measure of the percentage of existing records updated during a run (D) Refers to how closely the files fit into the allocated 3
After displaying the directory of a floppy disk, a different floppy is inserted into the drive. The contents of the original floppy continue to display regardless of the director requests on the other floppies placed in the drive. You remove the drive in question and install it into your test system, and it does not exhibit the problem. You should next replace the:
Options: System's floppy drive device driver, Original IDE controller, Floppy drive ribbon cable, System's power supply
Options: No financing is requird. The risk of system obsolescence is shifted to the lessor, the flexibility of modifying the system at will, Insurances, maintenance, and other expenses are included in the rental charge, All of the above
4.Lehmanâ€™s Second Law (Lehman and Belady 1985) is
Options: (A)Continuing change: A program used in real-world environment must change necessarily or become progressively less useful in that environment. (B) Increase complexity: As an evolving program change, its strictures tend to become more complex. Extra resources must be devoted to preserving and simplifying the structure. (C) Large program evolution: Program evolution is a self-regulating process. (D) None of these 19
Options: Return an entire collection of elements including duplicates., Return a collection of elements without duplicates., Return a specific subset of elements using a given criteria., All of the above.
Options: (A)Trustworthiness with which a system are transferred from one hardware environment to another (B) Here one sub system encapsulates a set of procedures, which can be called by other sub-systems. (C) It is concerned with studying existing process to understand the relationship between different parts of the process. (D) None of these 26
Options: a. Do not enter a value in the foreign key field of a child table if that value does not exist in the primary key of the parent table
b. Do not enter a value in the primary key field of chield table if that value does not exist in the primary key of the parent table
c. Do not enter a value in the foreign key field of a parent table if that value does not exist in the primary key of the child table
d. All of above
Options: (A)Involves only those tasks executing a communication operation (B) It exists between program statements when the order of statement execution affects the results of the program. (C) It refers to the practice of distributing work among tasks so that all tasks are kept busy all of the time. It can be considered as minimization of task idle time. (D) None of these