. Which of the following is true regarding Referential Integrity?
Options: Every primary-key value must match a primary-key value in an associated table
B. Every primary-key value must match a foreign-key value in an associated table
C. Every foreign-key value must match a primary-key value in an associated table
D. Every foreign-key value must match a foreign-key value in an associated table
Ans: â€“ C ,
More Database Systems Related questions:
How does Tomcat execute a JSP?
Options: As a CGI script, As an independent process, By one of Tomcat's threads, None of the above is correct.
. What is the use of a master document in Word 2010?
Options: It organize and maintain a Fonts & Pictures by creating a master folder
B. It organize and maintain a Heading and Styles by creating a master list
C. It organize and maintain a Long document by dividing it into several subdocuments
D. It organize and maintain a Styles and Links by creating a separate master document
Ans:– C ,
An electronic logic gate whose output is logic 0 only when all inputs are logic 1 is
Options: It means addressing a packet to all machine
B. It means addressing a packet to some machine
C. It means addressing a packet to a particular machine
D. It means addressing a packet to except a particular machine
Ans:– A ,
Options: are less reliable than electroÂ¬mechanical components, usually have a very short MTBF (mean time between failure), have a very short infant mortality period, All of the above
The computers that we use are digital whereas we live in an analog world which means that we have to translate analog data into digital data. What is the name of the circuit which helps us in this conversion?
The advantage(s) of incorporating the macro processor into pass 1 is/ are:
Options: many functions do not have to be implemented twice, Functions are combined and it is not necessary to create intermediate files as output from the macro processor and input to the assembler, more flexibility is available to the programmer in which he/she may use all the features of the assembler in conjunction with macros, All of the above
The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately equal to
We have Market Basket data for 1,000 rental transactions at a Video Store. There are four videos for rent -- Video A, Video B, Video C and Video D. The probability that Video D will be rented given that Video C has been rented is known as ________ .
Options: the basic probability, support, lift, confidence
What is the name given to the exchange of control signals which is necessary for establishing a connection between a modem and a computer at one end of a line and another modem and computer at the other end?