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 child 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
2.In Windows operating system it sits at the bottom of windows desktop screen. It shows you which programs are running and allows you to switch between them. It also contains the Start button which one can use to access programs, folders, and computer settings.
Options: (A)Sidebar (B) Icons (C) Taskbar (D) None of these
Options: A) Distributed data processing first became popular
B) An operating system was first developed
C) High level procedural language were first used
D) Online real time systems first become popular
Options: the President of America during World War I, the creator of cartoon films starring popular cartoon characters Mickey Mouse and Donald Duck, the British physician known for his discovery of Addison's disease, None of the above
Which one of the following phrases most accurately describes a purely capacitive circuit?
Options: Resistances provide the only opposition to current flow, Capacitive reactance provides the only opposition to current flow, The ac voltage leads the current by 90 degree, Combinations of resistance and capacitive reactance provide any opposition to current flow
Options: (A)Combining different types of method or information (B) Approach to the design of learning algorithms that is structured along the lines of the theory of evolution. (C) Decision support systems that contain an Information base filled with the knowledge of an expert formulated in terms of if-then rules. (D) None of these 4
Options: (A)the window wants to know what cursor it must display for the mouse pointer (B) the mouse is moved over a window (C) when a mouse button is pressed this event is executed (D) a mouse button is released 134 | 2
Options: An official standard has been defined for QBE., QBE cannot be used for client/server systems., QBE does not give the programmer a visual programming environment., Complete applications can be written using QBE.