Options: a. Foreign key fields don't allow duplicate values
b. In primary key field you can enter duplicate value
c. In an indexed field you may or may not enter duplicate value depending upon setting
d. All statements are true
Options: is an interface between two data circuit terminating equipment as examplified by a local and remote modem, is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment, specifies only the mechanical characteristics of an interface by providing a 25-pin connector, requires only 7 pin out of 25 in order to transmit digital data over public telephone lines
With an IP address set starting with 150, you currently have six offices that you are treating as subnets. Plans are in place to open 10 more offices before the end of the year. What subnet mask should you use to satisfy the needed number of subnets and maximize the number of hosts available at each site?
Which of the following is a read only memory storage device?
Options: Â Floppy Disk
B. Â CD-ROM Â Â Â
C. Â Hard Disk
D. Â None of these
Ans:– B ,
Two computers that communicate with each other use a simple parity check to detect errors for ASCII transmissions. Which of the following events will always lead to an undeleted error?
Options: one bit or any odd number of bits inverted in a block of data during transmission, two bits or any even number of bits inverted in a block during transmission, one bit or any odd number of bits inverted in a byte during transmission, two bits or any even number of bits inverted in a byte during transmission
. How can a user open the Expression Builder dialog box?
Options: a. By clicking the drop-down arrow on the Control Source property
b. By clicking the drop-down arrow of the Input Mask property in the Data tab
c. By clicking the Build button of the Input Mask in the Data tab
d. By clicking the Build button of the Control Source property in the Data tab
Options: defines the fundamental method of determining effective operand addresses, are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing., performs indicated operations on two fast registers of the machine and leave the result in one of the registers., all of the above
Options: To ensure that data is retransmitted if an acknowledgment is not received., To reassemble segments in the correct order at the destination device., To provide a means for the receiver to govern the amount of data sent by the sender., To regulate the size of each segment.