Top 10 Bootstrap Interview Questions

What is Bootstrap?

Bootstrap is an open-source HTML, CSS, and Javascript framework for responsive & mobile-friendly website designing.

There are 3 elements in bootstrap,

bootstrap.css - a CSS framework
bootstrap.js - a Javascript/JQuery framework
glyphicons - font & icon set

Bootstrap can be simply integrated along with distinct other platforms and frameworks, on existing sites and the new ones too. You can also utilize specific elements of Bootstrap along with your current CSS. Bootstrap approaches with popular pre-styled components for alerts, dropdowns, navigation bars, etc. It helps to reduce your project completion time. To learn more click here.

What are the advantages of Bootstrap?

The advantages of Bootstrap are,

Easy to Use
Responsiveness
Customizable Bootstrap
Consistency
Support
Simple Integration
Pre-styled Components
Grid etc.

To learn more click here.

What are the disadvantages of Bootstrap?

The disadvantages of Bootstrap are,

Styles are verbose and can lead to lots of HTML output that's not perfectly semantic.
Websites can start to look the same if you don't customize the styles and colors on your needs.
Javascript is tied to JQuery(it's by the far most common javascript library though and the plugins can just as easily be left unused).
It can require lots of overriding styles or rewriting their files if you have lots of customizations or want to deviate from the Bootstrap structure.

To learn more click here.

What is Jumbotron?

The jumbotron represents a big box for capturing the user's attention with some eye-catching content, offer, discount, etc. To learn more about the jumbotron click here.

What is Scrollspy?

The Scrollspy is used to automatically highlight the position of the content based on navigation or list-group components. To learn more about Scrollspy click here.

When to use Pagination?

The Pagination can be used when you have a website with lots of pages and you want to add some sort of pagination to each page. To learn more about Pagination click here.

What is Bootstrap Collapsible?

The Bootstrap Collapsible is used to show or hide a large amount of information. This is useful when you want to showcase different products, categories, etc. It uses javascript to show or hide an element based on mouse click events. To learn more about Collapse click here.

What are the Contextual classes in Bootstrap?

The Bootstrap Contextual classes are used to change the background color of individual table rows or table cells. It can be even applied in alert messages, breadcrumb, list-groups, panels, and etc. The Contextual classes are,

Default
Primary
Secondary
Success
Danger
Info
Warning
Light and
Dark

To learn more with an example click here.

What is Tooltip?

Tooltip is a small pop-up box that displayed when the user moves the mouse over an element. To learn more click here.

What is Breadcrumb?

The Bootstrap Breadcrumb indicates the current location of the user by highlighting the navigational hierarchy. To learn more with creative examples click here.

Comments

FORCE ORDER in SQL Server

The FORCE ORDER is a query hint it executes the order of the tables exactly specified in a statement. When we use this query hint in a statement it will tell SQL server not to change the order of the joins in the query. Basically, the SQL server rearrange your joins to be in the order that it thinks it will be optimal for your query to execute. Now, Lets see the execution plan without the FORCE ORDER: The above execution plan demonstrates the optimal order of the joins returned by the SQL server. As you can see the order starts from the sales details and goes by bank details to employee details. Suppose if you don't want the SQL server to change the order of the joins in a query you can use FORCE ORDER to stop the default ordering. The syntax for FORCE ORDER query hint is, OPTION ( FORCE ORDER ); Now, Lets see the execution plan with the FORCE ORDER: select * from tbl_EmployeeDetails as e inner join tbl_BankDetails as b on e.Id=b.EmpID inner join tbl_S...

How to create comma separated values in SQL server?

Comma Separated Values in SQL Predominantly in reporting, you may gone through a situation where you need to convert a comma separated values into list of rows or to convert a list of rows into single column to display in a report. In this splash reading, you will understand the following: How to convert comma separated data in a column to multiple rows How to convert multiple rows into one comma separated values Using COALESCE function Using STUFF function Convert comma separated data in a column to multiple rows Here we have an Customer table with a list of products bought by each customer, ID CUSTOMER PRODUCTS 1 Stuart Chain Saw,Circular Saw 2 Michael Drill,Hammer 3 Jonathan Sticky Notes,Mouse 4 Nabeel Mobile,Headset Suppose you want to return this as a single table, list of products bought by each customer. we need to create a function that splits our comma separated col...

OPTION (MERGE JOIN) in SQL Server

OPTION (MERGE JOIN) in SQL Server The MERGE JOIN query hint is a best available join algorithm in SQL server. It is based on first sorting both data sets according to the join conditions and then traversing through the sorted data sets and finding matches. The MERGE JOIN itself is very fast, but it can be an expensive choice if sort operations are required. This produces the best optimal execution plan. The syntax is, OPTION ( MERGE JOIN ); Now, Lets see how to use MERGE JOIN with SELECT statement.? select * from tbl_EmployeeDetails as e inner join tbl_BankDetails as b on b.EmpId=e.Id OPTION(MERGE JOIN); The statement returned optimal execution plan is, The MERGE JOIN operator gets a row from each input and compares them. In above statement, it merges all joins and first sorting data sets and then traversing through the sorted data sets and finding matches, if they are equal the rows are returned. If they are not equal, the lower-value row is rem...

How to manipulate JSON data in SQL server?

Manipulate JSON data in SQL Server JavaScript Object Notation (JSON) is a lightweight popular data exchangeable format used across modern IoT platforms, web and mobile applications etc. It is a language independent textual data format. JavaScript Object Notation (JSON) is also used for storing unstructured data in log files or NoSQL Databases such as Microsoft Azure Cosmos DB. Many RESTful web services that allow us to store and retrieve JSON formatted texts among different protocols using different Endpoints. The example of JSON text is as follows, [{ "customer":"Michael", "products":["Watch","Mobile","Books"] }, { "customer":"Stuart", "products":["Laptop","Keyboard","Mouse"] } ] In this article you will understand the following, Read JSON data from table Modify JSON data in a table Validate JSON objects ...

OPTION Loop Join in SQL Server

The OPTION ( LOOP JOIN ) would enforce LOOP JOIN across all joins in the query. Using the OPTION ( LOOP JOIN ) appears to allows the query optimizer to join the tables using the nested loops in which ever order SQL server decides it is optimal. The OPTION clause must be a last clause in a statement. The syntax is, OPTION ( LOOP JOIN ); Now, Lets see how to use LOOP JOIN with SELECT statement.? select *from tbl_EmployeeDetails as e inner join tbl_BankDetails as b on b.EmpID=e.Id inner join tbl_SalesDetails as s on s.BankId=b.Id OPTION(LOOP JOIN); The statement returned execution plan is, The above statement loops through all the joins that starts from sales details and goes by bank details to employee details in which the order that SQL server thinks it is optimal. This does not follow the order of joins that we specify. Suppose, if you want the SQL server to follow the order of joins that you specify you have to use FORCE ORDER in OPTION clause. Howe...

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