Important File Extensions Questions and Answers

Answer: D

Correct answer: JavaScript Object Notation

.json holds JavaScript Object Notation, a plain-text format for structured data built from key-value pairs and lists. Despite the name it is language-independent, and it is the usual format for web APIs.

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: .cpp

.cpp is the usual extension for C++ source; the doubled p stands for the two plus signs in the language's name. Plain C source uses .c.

Answer: A

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: 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: A

Correct answer: .gz

.gz marks a file compressed with gzip, the GNU compression program. A tarball compressed this way is commonly .tar.gz, since tar bundles the files and gzip compresses the bundle.

Answer: C

Correct answer: VBScript File

.vb denotes Visual Basic source, and in the scripting context a VBScript file. JavaScript uses .js and Windows Script Files .wsf.

Answer: B

Correct answer: .cgi

.cgi marks a Common Gateway Interface script - a program a web server runs to generate a page rather than serving a file.

Answer: C

Correct answer: .vcf

.vcf is a vCard file, the standard format for exchanging contact details. Phones and mail clients use it to export and import an address book, which is why a contact shared over email arrives as one.

Answer: C

Correct answer: .sql

.sql holds SQL statements - a script of queries or a dump of a database as the commands needed to rebuild it. .db holds the database itself rather than the statements.