Important File Extensions Questions and Answers

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: A

Correct answer: .dmg

.dmg is the disk image format used on macOS. Mounting one makes it appear as a virtual disk on the desktop, which is how most Mac applications are distributed for installation.

Answer: A

Correct answer: Word Perfect Document

WPD is the document format of WordPerfect, the word processor that dominated before Word. The extension is built from the product name.

Answer: C

Correct answer: .lnk

.lnk is a Windows shortcut. It holds only a pointer to the real file along with its icon and working directory, so deleting the shortcut leaves the target untouched.

Answer: B

Correct answer: .epub

.epub stands for Electronic Publication, the open standard of the International Digital Publishing Forum. Its text reflows to fit the screen, which is what distinguishes it from a fixed-layout PDF.

Answer: C

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: 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: Bitmap Image File

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

Answer: D

Correct answer: .md

.md is a Markdown file: plain text with a light syntax for headings, lists and links that converts cleanly to HTML. README files in software projects are conventionally written in it.

Answer: C

Correct answer: .apk

.apk stands for Android Package Kit. It is a ZIP archive holding the compiled code, resources and manifest of an Android app, and it is what the Play Store delivers to a device at install time.