Explanation

• E-mail stands for: Electronic Mail

• Father of E-mail: Ray Tomlinson

• First E-mail sent: 1971

• @ is used to divide an email into: two parts

• SMTP helps to send: E-mails

• SMTP stands for: Simple Mail Transfer Protocol

• Received email is saved: inbox

• Sent email is saved in: sent box

• Maximum attachment size in Yahoo Email: 25 MB

• G-mail stands: Google Mail

• Email spam also called: junk email

• To close email account click: sign out

• To create new E-mail: Sign Up

• Email hacking means: Illegal access to open email accounts of others

• Junk email is also called: Spam 

•  At sign (@): always a part of email address

• Sending an E-mail is similar to: writing a letter

• A allows us to access our e-mail from anywhere: Webmail interface 

• Bookmark:  is associated with Internet E-mail

Explanation

A friend function can access the private and protected data of a class.

Explanation

A transaction log is a history of actions executed by a "Database Management System" (DBMS) to guarantee "ACID" properties over crashes or hardware failures.

Physically, a log is a file listing changes to the database, stored in a stable storage format.

Explanation

In computer science, a semaphore is a variable or abstract data type used to control access to a common resource by multiple threads and avoid critical section problems in a concurrent system such as a multitasking operating system.

Semaphores are a type of synchronization primitive. 

Explanation

The software used to open PDF files and surf websites is called browser.

Explanation

Instant messaging (IM) technology is a type of online chat allowing real-time text transmission over the Internet or another computer network.

Explanation

Most social networks allow users to create detailed online profiles and connect with other users in some way.

Explanation

The relational database environment has all of the following components except separate files.

A relational database is a set of formally described tables from which data can be accessed or reassembled in many different ways without having to reorganize the database tables.

Explanation

The strcpy() function copies string2, including the ending null character, to the location that is specified by string1.

The strcpy() function operates on null-ended strings.

The string arguments to the function should contain a null character (\0) that marks the end of the string.

Explanation

com is a top-level domain.