Yes,  

Yes it is correct choice. The data in the audio files are in the form of WAVE.  WAVE is an audio format used to store sound data. It is is similar to the AIFF format, but is based on the Resource Interchange File Format (RIFF), a container format designed to store data in "chunks."

Yes, this is the correct answer. Software quality assurance (SQA) involves error detection , error correction and error prevention. 

Yes,  this is correct choice. As landscape and portrait are the types of page oreintation.

BMP is not a type of media compression. Like file compression, the goal of media compression is to reduce file size and save disk space. Most popular image formats use some type of compression. Three of the most common include JPEG, GIF, and PNG.

Yes it is the correct choice. The paragraph mark (¶) is a formatting mark that indicates where the tab was pressed. It appears in the standard tool bar.

Yes, it is the correct choice. Status bar provides information about open document, current settings and operations in progress.

Yes,  in bus and star architecture all the nodes are connected to the central device. Some times it is called as hub or main system.

No bus topology requires only single cable. So this choice is incorrect .

Yes, it is  correct.

Yes,  it is  correct.  I terabyte = 10¹²

Yes, it is correct choice. In 2 tier architecture, the client interacts with a server.

Yes, all three choices deal with system analysis.

Yes, it is correct choice. Spam is a threat email .

Yes, it is correct.. Encryption is the coding or scrambling of information,  so that it can only be decoded and read by someone who has the correct decoding key. Encryption is used in  secure Web sites as well as other mediums of data transfer.