Options: a. is used to delete all the records of all tables in a database
b. will repeat the recent delete operation to all the records of current table
c. is available in Edit relationship dialog box which makes sure that all the related records will be deleted automatically when the record from parent table is deleted
d. None of above
8.Given three switch processes, when they occur match them (1) Clock Interrupt A- The processor encounters a virtual memory address reference for aword that is not in the main memory. (2) I/O Interrupt B- The operating system determines whether the currently running process has been executed for the maximum allowable time slice. (3) Memory fault C- The operating system determines the I/O action that occurs.
Options: (A)a prepared application that takes advantage of a known weakness. (B) a tool used to quickly check computers on a network for known weaknesses. (C) an application that captures TCP/IP data packets, which can maliciously be used to capture passwords and other data while it is in transit either within the computer or over the network. (D) a situation in which one person or program successfully masquerades as another by falsifying data and thereby gaining illegitimate access. 1
Which one of the following statements most accurately applies to the frequency of a waveform?
Options: The actual frequency of a sine waveform is 1.41 times the working frequency, Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz, The higher the amplitude of a waveform, the higher its frequency, The longer the period of a waveform, the lower its frequency
Options: (A)Controls the operation of the computer. (B) Stores data and program. (C) Move data between the computer and external environment. (D) Provides communication among processors and main memory. 3
7.In Excel you can select a single range of cells by
Options: (A)Clicking the upper-left cell in a group of cells and then pressing the Shift key while clicking the lower right cell in a group of cells (B) Pressing the Ctrl key while dragging over the desired cells (C) Pressing the Shift key and an arrow key (D) Dragging over the desired cells 6
Options: the central processing unit of the computer only., the central processing unit of the computer and input/output units only, the central processing unit of the computer, input/output units, and data storage units only, All of the above
When applying a square waveform to a capacitor, the circuit tends to:
Options: peak the voltage and round off the current waveforms, peak the current and round off the voltage waveforms, round off both the voltage and current waveforms, peak both the voltage and current waveforms