In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:
Options: all columns of the table are to be returned., all records meeting the full criteria are to be returned., all records with even partial criteria met are to be returned., None of the above is correct.
In order to arrange the countries from those with the highest population to those with the lowest, you need to sort on the population field in â€¦â€¦â€¦â€¦â€¦
Options: ascending order
B. descending order
C. alphabetical order
D. random order
Ans:– B ,
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?
Options: The voltage remains at one polarity and at a steady level, The voltage remains at one polarity but changes value periodically, The voltage causes current to flow in two directions at the same time, The voltage reverses polarity periodically
. To show/hide the grid lines in Microsoft Excel 2007
Options: Page Layout -> Grid lines -> View
B. Insert -> Grid lines -> View
C. View -> Grid lines -> View
D. Edit -> Grid lines -> View
Ans:– A ,
Which of the following is true concerning QBE?
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.
How does a host on an Ethernet LAN know when to transmit after a collision has occurred? In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting. You can improve the CSMA/CD network by adding more hubs. After a collision, the station that detected the collision has first priority to resend the lost data. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.