Railway Science (Computer – Extensions)

Total Questions: 6

1. In a web address, the domain indicator (suffix) ‘.com‘ stands for: [RRB NTPC CBT - I (12/01/2021) Evening]

Correct Answer: (d) commercial
Solution:

A domain name is a unique name given to each website on the internet. The last part of the domain name is known as domain extension. Domain extensions- .edu (educational institutions), .mil (military), .org (organization), .gov (government agencies).

2. Which of the following is an audio file extension ? [RRB NTPC CBT - I (19/01/2021) Evening]

Correct Answer: (a) wma
Solution:

wma (Windows Media Audio) is a series of audio codecs and their corresponding audio coding formats developed by Microsoft.
mov - Developed by Apple, the mov file extension represents QuickTime video format. wmv is a "Windows Media Video" developed by Microsoft.

3. Which among the following is NOT an extension for a video file ? [RRB NTPC CBT - I (20/01/2021) Evening]

Correct Answer: (c) .jpeg
Solution:

jpeg stands for “Joint Photographic Experts Group”. It is an extension of the image file. avi is Audio Video Interleave.

4. ‘psd’ is a file extension for which type of computer file ? [RRB NTPC CBT - I (01/03/2021) Morning]

Correct Answer: (b) Adobe PhotoShop
Solution:

Other file extensions - .psp - Paintshop pro, .xls - Ms excel.

5. PNG file is a/an : [RRB NTPC CBT - I (15/03/2021) Morning]

Correct Answer: (b) image file
Solution:

The Portable Network Graphic (PNG) file format is ideal for digital art (flat images, logos, icons, etc.), and uses 24-bit color as a foundation.

6. Which of the following is the Extension of Microsoft Word files ? [RRB NTPC CBT - I (23/07/2021) Evening]

Correct Answer: (a) docx
Solution:

Other types of file extensions: Spreadsheet files - csv, xls, xlsx. Image files - bmp, gif, jpeg, jpg, png. Audio and video files. aiff, mov, mp3, mp4, mpg, wav, wma, wmv.