Answer : (2)

All others have two vowels each

Answer : (5)

The first four pairs indicate opposite of one another, whereas (5) is a pair of words having the same meaning.

Wi-Fi technology is a technology used for transmitting a signal using the 802.11 specifications works a lot like it does with a basic Ethernet hub: They’re both two-way forms of communication, and they both use the same frequency to both transmit and receive, often referred to a half-duplex. WLANs used radio frequencies (RFs) that are radiated into the air from an antenna that creates radio waves. These waves can be absorbed, refracted, or reflected by walls, water, and metal surfaces, resulting in low signal strength. So because of this vulnerability to surrounding environmental factors, it’s pretty apparent that wire-less will never offer us the same robustness as a wired network can, but that still doesn’t mean we’re not going to use or run the wireless or Wi-Fi.

The handheld device is used as a network device, which always connected to the data account of the user via redirector software. The software is installed on the BlackBerry Enterprise Server. The communication between the software, BE Server and the hand held device’s software is always a two-way street. BES immediately updates the mobile device or the email or the calendar account, whenever a change in email account occurs.

The push technology of BlackBerry keeps the device instantly in “synch” without any effort by the user. 

BlackBerry is nothing but a handheld wireless device that is just like a two way pager.

It supports the features like mobile telephone, push e-mail, text messaging, web browsing, internet faxing.

In addition to these, all types of wireless information services and multi-touch interfaces are also included. 

Oracle Real Application Clusters (RAC) is a software component we can add to a high-availability solution that enables users on multiple machines to access a single database with increased performance. RAC comprises two or more Oracle database instances running on two or more clustered machines and accessing a shared storage device via cluster technology. To support this architecture, the machines that host the database instances are linked by a high-speed interconnect to form the cluster. Oracle RAC offers features in the following areas:

- Scalability

- Availability

- Load balancing

- Failover

The CACHE option means how many sequences will be stored in memory for access by the application objects. The performance is faster. However in case of the database is down the data is memory is lost for the sequence.

The NO CACHE option means values are not stored in memory. So there might be some performance issue. 

- %FOUND

 This is a Boolean variable which evaluates to TRUE if the last row is successfully fetched.

- %NOTFOUND

 This is a Boolean variable which evaluates to TRUE if the last row is not successfully fetched. This means there are no more rows to fetch.

- %ROWCOUNT

 Returns the number of rows fetched by the cursor.

- %ISOPEN

If the cursor is open, it evaluates to TRUE else FALSE.