Important File Extensions Questions and Answers

Answer: B

Correct answer: .com

.com is the DOS command file - a small executable loaded and run directly. .bat is a batch file of commands rather than an executable itself.

Answer: B

Correct answer: .ws

.ws is the Windows Script extension. Note the near neighbour: .wsf is a Windows Script File, an XML wrapper that can combine several scripts and languages in one file.

Answer: C

Correct answer: .deb

.deb is the Debian software package, the installation format used by Debian and by the distributions derived from it, such as Ubuntu.

Answer: B

Correct answer: Portable Network Graphic File

PNG is Portable Network Graphics, the lossless image format created as a patent-free replacement for GIF.

Answer: B

Correct answer: .db

.db is the generic database file extension. Microsoft Access uses .mdb and SQL Server .mdf, but the plain form is .db.

Answer: D

Correct answer: .csv

.csv is a comma-separated values file - plain text in which each line is a record and commas separate the fields, which is why almost every program can read it.

Answer: A

Correct answer: data file

.dat is a generic data file: the extension says only that the contents are data for some program, without identifying the program or the format.

Answer: B

Correct answer: Dynamic Link Library

DLL stands for Dynamic Link Library - code that is linked to a program while it runs rather than when it is compiled, so several programs can share one copy.

Answer: A

Correct answer: .ppt

.ppt is the PowerPoint presentation format up to Office 2003, replaced by .pptx afterwards. .pps is the same content saved to open straight into the slide show.

Answer: A

Correct answer: Bitmap Image File

.bmp is a bitmap image - the raw, uncompressed Windows image format that stores the colour of every pixel.