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Friday, August 12, 2016

Top 15 Most Important Sass Interview Questions with Answers.


Top 15 Most Important Sass Interview Questions with Answers. Latest Sass Interview Questions and Answers. Most Frequently Asked Sass Interview Questions And Answers.

1) Explain what is Sass? How it can be used?

Sass stands for Syntactically Awesome Stylesheets and was created by Hampton Catlin. It is an extension of CSS3, adding nested rules, mixins, variables, selector inheritance, etc.

Sass can be used in three ways

As a command line tool
As a standalone Ruby module
As a plugin for any Rack-enabled framework

2) List out the key features for Sass?

Key features for Sass include

Full CSS3-compatible
Language extensions such as nesting, variables, and mixins
Many useful functions for manipulating colors and other values
Advanced features like control directives for libraries
Well-formatted, customizable output

3) List out the Data Types that SassScript supports?

SassScript supports seven main data types

Numbers ( eg; 1,5 ,10px)
Strings of texts ( g., “foo”, ‘bar’, etc.)
Colors (blue, #04a3f9)
Booleans (true or false)
Nulls (e.g; null)
List of values, separated by space or commas (g., 1.5em, Arial, Helvetica etc.)
Maps from one value to another (g., ( key 1: value1, key 2: Value 2))

4) Explain how to define a variable in Sass?

Variables in Sass begin with a ($) sign and variable assignment is done with a colon(:).

5) Explain what is the difference between Sass and SCSS?

The difference between Sass and SCSS is that,

Sass is a CSS pre-processor with syntax advancements and an extension of CSS3
Sass has two syntax
The first syntax is “SCSS” and it uses the .scss extension
The other syntax is indented syntax or just “Sass” and it uses the .sass extension
While Sass has loose syntax with white space and no semicolons, the SCSS resembles more to CSS
Any CSS valid document can be converted to Sass by simply changing the extension from.CSS to.SCSS.


6) What Selector Nesting in Sass is used for?

In Sass, selector nesting offers a way for stylesheet authors to compute long selectors by nesting shorter selectors within each other.

7) Explain what is a @extend function used for in Sass?

In Sass, the @EXTEND directive provides a simple way to allow a selector to inherit the styles of another one. It aims at providing a way for a selector A to extend the styles from a selector B. When doing so, the selector A will be added to selector B so they both share the same declarations.  @EXTEND prevents code bloat by grouping selectors that share the same style into one rule.

8) Explain what is the use of the @IMPORT function in Sass?

The @IMPORT function in Sass

Extends the CSS import rule by enabling import of SCSS and Sass files
All imported files are merged into a single outputted CSS file
Can virtually mix and match any file and be certain of all your styles
@IMPORT takes a filename to import

9) Why Sass is considered better than LESS?

Saas allows you to write reusable methods and use logic statements, e., loops, and conditionals
Saas user can access Compass library and use some awesome features like dynamic sprite map generation, legacy browser hacks and cross-browser support for CSS3 features
Compass also allows you to add an external framework like Blueprint, Foundation or Bootstrap on top
In LESS, you can write a basic logic statement using a ‘guarded mixin’, which is equivalent to Sass if statements
In LESS, you can loop through numeric values using recursive functions while Sass allows you to iterate any kind of data
In Sass, you can write your own handy functions

10) Explain what is the use of Mixin function in Sass? What is the meaning of DRY-ing out a mixin?

Mixin allows you to define styles that can be re-used throughout the stylesheet without needing to resort to non-semantic classes like .float-left.

DRY-ing out of a mixing means splitting it into dynamic and static parts.  The dynamic mixin is the one that the user actually going to call, and the static mixin is the pieces of information that would otherwise get duplicated.

11) Explain what Sass Maps is and what is the use of Sass Maps?

Sass map is a structured data in a hierarchical way and not just a bunch of variables. It can help in organizing the code. Some great use of Sass are

It is very useful when dealing with layers of elements in your project
It can be helpful in color management when there is long list of different color and shade
Use icon map for various social media icons for example: facebook: ‘e607’ or twitter: ‘e602’
Unlike other programming libraries, Sass map will consist only of code that is going to be used

12) Explain how Sass comments are different from regular CSS?

Syntax for comments in regular CSS starts with /* comments…*/, while in SASS there are two type of comment, the single line comments // and the multiline CSS comments with /* */.

13) Does Sass support inline comments?

Single line comments // will be removed by the .scss pre-processor and won’t appear in your .css file

While the comment */ are valid CSS, and will be preserved between the translation from .scss to your .css file

14) How interpolation is used in Sass?

In Sass, you can define an element in a variable and interpolate it inside the Sass code.  It is useful when you keep your modules in separate files.

15) Explain when can you use the %placeholders in Sass?

%placeholders in Sass is useful when you want to write styles that were meant to be extended, but you don’t want the base styles to be seen in output CSS styles

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