About Life

The acts of this life are the destiny of next.

We make a living…

What we have done for ourselves dies with us,

But what we have done for others remains forever.

We make a living by what we got,

But we make a life by what we give

Follow Your Dreams

Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world.

 

 

Harriet Tubman

Happiness Quotes

When one door of happiness closes, another opens, but often we look so long at the closed door that we do not see the one that has been opened for us.
Helen Keller

Hub and Its Types

A common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

A passive hub serves simply as a conduit for the data, enabling it to go from one device (or segment) to another. So-called intelligent hubs include additional features that enables an administrator to monitor the traffic passing through the hub and to configure each port in the hub. Intelligent hubs are also called manageable hubs.

A third type of hub, called a switching hub, actually reads the destination address of each packet and then forwards the packet to the correct port.

C++ OBJECTIVE TYPE QUESTIONS

1.       In the code fout.open("scores.dat", ios::out);

a.   ios::out is the stream operation mode        b.   fout is the header file reference

c.   ios::out is the stream variable name           d.   fout is the name of the file.

Answer : a

2.      ifstream fin would be used when

            a.   creating a file                                 b.   reading a file

c.   appending a file                             d.   removing a file

Answer :  b

3.      eof( ) is the function used for

            a.  asserting no errors in a file                         b.  appending data to a file

c.  counting the amount of data in a file         d.  checking for end of file

Answer :  d

4.      How many files can be accessed at a time?.

            a.   Zero           b.   One          c.   Two          d.   Many

Answer :  d

5.      Which of the following header files is required for creating and reading data files?

a.  ofstream.h  b.   fstream.h  c.   ifstream.h  d.   console.h

Answer :  b

RDBMS Concepts

1.      What is database?

A database is a logically coherent collection of data with some inherent meaning, representing some aspect of real world and which is designed, built and populated with data for a specific purpose.

2.      What is DBMS?

It is a collection of programs that enables user to create and maintain a database. In other words it is general-purpose software that provides the users with the processes of defining, constructing and manipulating the database for various applications.

3.      What is a Database system?

The database and DBMS software together is called as Database system.

4.      Advantages of DBMS?

  Redundancy is controlled.

Unauthorised access is restricted.

  Providing multiple user interfaces.

 Enforcing integrity constraints. 

  Providing backup and recovery.

5.      Disadvantage in File Processing System?

  Data redundancy & inconsistency.

  Difficult in accessing data.

  Data isolation.

  Data integrity.

 Concurrent access is not possible.

 Security Problems.