Bootstrap MCQs
Q.1 Which class adjusts the vertical alignment of elements in Bootstrap?
A. .align-baseline
B. .align-top
C. .align-middle
D. .align-bottom
Q.2 What is the purpose of the .text-center class in Bootstrap?
A. To center text horizontally
B. To center text vertically
C. To justify text
D. To highlight text
Q.3 Bootstrap’s spacing utilities control which of the following aspects?
A. Margin and padding
B. Color and font
C. Position and display
D. Width and height
Q.4 Which utility class in Bootstrap is used to hide an element on all device sizes?
A. .invisible
B. .hidden
C. .hide
D. .none
Q.5 A developer finds that columns break out of alignment when resizing the browser window.
What could be the issue?
A. Improper column reset
B. Non-responsive meta tag
C. Incorrect row setup
D. Misconfigured breakpoints
Q.6 How can unexpected horizontal scrolling be fixed in a Bootstrap grid layout?
A. Check container classes
B. Remove custom CSS
C. Reduce column counts
D. All of the above
Q.7 What might cause gaps between columns in a Bootstrap layout?
A. Missing ‘row’ class
B. Extra padding in columns
C. Improper use of .col classes
D. All of the above
Q.8 If columns are unexpectedly stacking vertically on a medium device, what should be checked first?
A. Row configuration
B. Column class overlap
C. Container fluidity
D. Viewport settings
Q.9 Which class combination creates a responsive column that stacks on small screens and aligns side by side on medium screens?
A. .col-12 .col-md-6
B. .col-sm-12 .col-md-6
C. .col-xs-12 .col-lg-6
D. .col-6 .col-lg-12
Q.10 To center a column in the grid, which utility class is necessary alongside the column size class?
A. .mx-auto
B. .center-block
C. .auto-margin
D. .align-self-center
Q.11 What class would you use to create four equal columns in a single row on medium screens?
A. .col-md-3
B. .col-md-4
C. .col-md-6
D. .col-md-12
Q.12 Which class is used to make a column span three equal parts of the container width on a large screen?
A. .col-lg-4
B. .col-lg-3
C. .col-lg-12
D. .col-lg-1
Q.13 Which Bootstrap feature allows for columns to reorder based on screen size?
A. Flex properties
B. Push and pull classes
C. Responsive resets
D. Visibility classes
Q.14 What effect does ‘offset-‘ have in Bootstrap’s grid system?
A. Increases padding inside columns
B. Moves columns to the right
C. Changes the color of columns
D. Decreases column width
Q.15 How does the class ‘col-6’ affect the width of a column in a Bootstrap grid?
A. Spans half of the screen
B. Spans one-sixth of the screen
C. Spans six pixels wide
D. None of the above
Q.16 Which class adjusts the alignment of elements within a column in Bootstrap’s grid system?
A. .align-items-start
B. .align-items-end
C. .justify-content-center
D. .row-align
Q.17 What is the purpose of the Bootstrap class ‘row’?
A. To align text
B. To create a horizontal grouping of columns
C. To set borders
D. To add padding
Q.18 What does the ‘col-‘ prefix in Bootstrap indicate?
A. Column control
B. Container sizing
C. Color adjustment
D. Cursor change
Q.19 In Bootstrap’s grid system, which class is used for medium-sized screens?
A. .col-md
B. .col-sm
C. .col-lg
D. .col-xs
Q.20 What is the maximum number of columns in Bootstrap’s grid system?
A. 8
B. 10
C. 12
D. 16
Q.21 If a Bootstrap navbar is not responsive, what is a common oversight to check for?
A. Missing viewport meta tag
B. Incorrect CSS link
C. Outdated Bootstrap version
D. All of the above
Q.22 Which class adds a responsive horizontal margin in Bootstrap?
A. .mx-auto
B. .mx-responsive
C. .mx-width
D. .mx-fill
Q.23 What is the advantage of using Bootstrap’s precompiled feature?
A. Faster server response
B. Easier debugging
C. Quicker deployment
D. Enhanced security
Q.24 Which Bootstrap feature provides the ability to hide or show content based on screen size?
A. Data-binding
B. Responsive utilities
C. Ajax components
D. None of the above
Q.25 What is the purpose of the Bootstrap “container” class?
A. To enhance text readability
B. To manage server requests
C. To structure the layout
D. To style images
Q.26 Bootstrap’s grid system is based on how many columns?
A. 10
B. 12
C. 14
D. 16
Q.27 Which company originally developed Bootstrap?
A. Google
B. Twitter
C. Facebook
D. Microsoft
Q.28 Bootstrap is mainly used for:
A. Server-side operations
B. Network security
C. Front-end development
D. Data analysis
Q.29 What type of design approach does Bootstrap emphasize?
A. Content-first
B. Mobile-first
C. Graphics-first
D. None of the above
Q.30 Which framework is Bootstrap built on?
A. CSS
B. JavaScript
C. PHP
D. None of the above
Q.31 What Bootstrap class is needed to create a dropdown menu within a navigation bar?
A. .dropdown
B. .drop-nav
C. .navbar-dropdown
D. .nav-drop
Q.32 How do you create a basic alert box in Bootstrap that can be dismissed by the user?
A. Use .alert with .alert-dismissible
B. Use .alert with .close
C. Use .alert with .alert-close
D. Use .alert with .dismiss-alert
Q.33 What class is used to make a navigation bar sticky at the top of the viewport in Bootstrap?
A. .fixed-top
B. .sticky-top
C. .top-nav
D. .nav-fixed
Q34 What is the function of Bootstrap’s Scrollspy component?
A. To add animations to scrolling
B. To update links in a navigation list based on scroll position
C. To hide elements on scroll
D. To lock an element at a specific scroll position
Q.35 Which Bootstrap component should be used for complex form layouts that require inline arrangement of form controls?
A. Forms
B. Grid system
C. Input group
D. Card
Q.36 How do Bootstrap Navs differ from Tabs?
A. Navs are always vertical, while Tabs are horizontal
B. Navs offer more style options
C. Tabs are clickable, while Navs are not
D. Navs are for navigation, Tabs are for content organization
Q.37 Which Bootstrap component is best suited for displaying a list of items with contextual background colors?
A. List group
B. Progress bar
C. Tooltip
D. Table
Q.38 In Bootstrap, what is the purpose of the Jumbotron component?
A. To enhance navigation
B. To increase font size
C. To create a lightweight container for calling extra attention to content
D. To display modal dialogs
Q.39 What does the Bootstrap Carousel component do?
A. Rotates text
B. Displays a series of images or slides in a slideshow
C. Collapses content
D. Expands forms
Q.40 Which component is used to create a group of buttons that can toggle between active and inactive states?
A. Navs
B. Button group
C. Input group
D. Dropdown
Q.41 What is the primary use of Bootstrap’s Modal component?
A. To navigate between pages
B. To display interactive alerts
C. To organize content
D. To display additional information in a popup
Q.42 How can you troubleshoot a custom Bootstrap build that fails to compile?
A. Check for missing dependencies
B. Review SCSS syntax errors
C. Ensure file paths are correct
D. All of the above
Q.43 What should you verify if a Bootstrap customization does not display correctly on a webpage?
A. The CSS file is linked correctly
B. The customization uses correct syntax
C. The browser cache has been cleared
D. All of the above
Q.44 If changes to Bootstrap’s SCSS variables do not take effect, what is the first thing you should check?
A. File import order
B. SCSS compiler settings
C. Syntax errors
D. All of the above
Q.45 What SCSS function is crucial for adding new utilities with custom properties in Bootstrap?
A. @include
B. @function
C. @extend
D. @import
Q.46 How do you override the default color palette in Bootstrap using SCSS?
A. Define new values before importing Bootstrap
B. Overwrite values in a new file
C. Change colors in the CSS file
D. Use !important in CSS
Q.47 Which Bootstrap variable can be adjusted to change the default padding for modals?
A. $modal-padding
B. $modal-margin
C. $modal-spacing
D. $modal-position
Q.48 What is a critical consideration when upgrading Bootstrap versions in a heavily customized project?
A. Checking for deprecated features
B. Rewriting all custom code
C. Reducing page size
D. Increasing compatibility with browsers
Q.49 What is the advantage of using Bootstrap’s built-in mixins for customizations?
A. Faster compilation
B. Less code redundancy
C. Easier debugging
D. All of the above
Q.50 In what file type is Bootstrap’s source code primarily written?
A. .css
B. .scss
C. .js
D. .html
Q.51 How does creating a custom theme differ from modifying Bootstrap’s core files?
A. It’s more stable across updates
B. It requires more coding skills
C. It’s less flexible
D. It’s cheaper
Q.52 What is the main method for customizing Bootstrap’s visual design?
A. Overriding existing CSS
B. Editing the source code
C. Using inline styles
D. Using CSS preprocessors
Q.53 When a utility class for margin isn’t affecting an element as expected, what is a likely cause?
A. Incorrect class name
B. Insufficient specificity
C. Colliding CSS
D. All of the above
Q.54 If an element with .text-danger is not displaying red text as expected, what should be checked first?
A. CSS file linkage
B. Overriding styles
C. Browser compatibility
D. Font settings
Q.55 Which class combination is used to set text color to primary and background color to secondary in Bootstrap?
A. .text-primary .bg-secondary
B. .text-color-primary .background-secondary
C. .color-primary .bg-color-secondary
D. .primary-text .secondary-bg
Q.56 What class would you use to make a list item non-bulleted in a Bootstrap list group?
A. .list-unstyled
B. .no-bullets
C. .list-inline
D. .list-horizontal
Q.57 Which Bootstrap utility class adds a shadow to a box?
A. .box-shadow
B. .shadow
C. .drop-shadow
D. .shadow-sm
Q.58 How would you apply a Bootstrap class to add a small space between two buttons?
A. .m-1
B. .m-2
C. .m-3
D. .m-4
Q.59 Which utility class is used for changing the display property of an element to ‘none’ in Bootstrap?
A. .d-none
B. .display-none
C. .hide
D. .invisible
Q.60 What does the ‘text-‘ prefix in Bootstrap’s utility classes generally modify?
A. Font size
B. Text alignment
C. Font style
D. Text decoration
Q.61 What is the primary purpose of the ‘data-toggle’ attribute in Bootstrap?
A. To switch data sources
B. To initiate JavaScript widgets
C. To toggle CSS classes
D. To activate server requests
Q.62 How do Bootstrap’s JavaScript plugins enhance the user interface?
A. By adding dynamic effects like modals and dropdowns
B. By speeding up the website
C. By compressing content
D. By encrypting data
Q.63 Which jQuery function is typically used to ensure that scripts run after the document is fully loaded?
A. .onLoad()
B. .documentReady()
C. .ready()
D. .loadComplete()
Q.64 What could prevent a Bootstrap tooltip from displaying when hovering over an element?
A. Missing title attribute
B. Incorrectly initialized tooltips
C. Overridden CSS styles
D. Improper script ordering
Q.65 If a Bootstrap dropdown is not triggering when clicked, what should you check first in the JavaScript setup?
A. If jQuery is loaded
B. If the dropdown method is called
C. If there is a syntax error in the script
D. If data-toggle attribute is set
Q.66 What is the correct way to programmatically open a modal in Bootstrap using JavaScript?
A. $(‘#myModal’).modal(‘show’)
B. $(‘#myModal’).open()
C. $(‘#myModal’).modal(‘open’)
D. $(‘.modal’).show(‘open’)
Q.67 How do you initialize all tooltips on a page using Bootstrap’s JavaScript API?
A. $(‘[data-toggle=”tooltip”]’).tooltip()
B. $(‘.tooltip’).init()
C. $(‘body’).tooltip()
D. $(‘.tip’).activate()
Q.68 Which class in Bootstrap is used to add a dismiss function to alerts via JavaScript?
A. .alert-dismissable
B. .alert-closable
C. .dismiss-alert
D. .alert-dismissible
Q.69 What must be considered when binding JavaScript events to Bootstrap components dynamically added to the DOM?
A. Event delegation
B. Browser compatibility
C. Loading order of scripts
D. Memory usage
Q.70 In Bootstrap, what is the purpose of the data-toggle attribute?
A. To connect data entries
B. To toggle elements on the page
C. To bind data to a model
D. To transform data visuals
Q.71 How does Bootstrap’s JavaScript enhance form validation?
A. By adding custom validation rules
B. By automatically checking form completeness
C. By providing real-time feedback
D. By encrypting form data
Q.72 Which Bootstrap component uses JavaScript to toggle between showing and hiding content?
A. Carousel
B. Modal
C. Collapse
D. Tooltip
Q.73 What is the primary purpose of jQuery in Bootstrap’s JavaScript components?
A. To manipulate DOM elements
B. To handle HTTP requests
C. To parse JSON data
D. To animate HTML elements
Q.74 What should you do if custom validation messages in Bootstrap are not displaying as intended?
A. Check JavaScript validation logic
B. Ensure data attributes are set correctly
C. Verify the use of .is-valid or .is-invalid classes
D. Recompile Bootstrap SCSS
Q.75 If a form’s input fields are not responding to Bootstrap’s styling,
what could be the reason?
A. Incorrect class names
B. Outdated Bootstrap version
C. Conflicting CSS styles
D. Incorrect HTML structure
Q.76 What common error should be checked if a Bootstrap form is not aligning properly on mobile devices?
A. Incorrect column classes
B. Missing .form-row class
C. Improper form wrapping
D. Incorrect use of .container
Q.77 How do you apply a readonly attribute to a Bootstrap input field without affecting its style?
A. Add .readonly to the class attribute
B. Add readonly attribute to the input element
C. Use .form-readonly
D. Set disabled=”true”
Q.78 What is the correct way to structure a Bootstrap form group that includes a label, input, and feedback message for validation?
A. Use .form-group with .form-label, .form-control, and .valid-feedback
B. Use .input-group with label, input, and .feedback
C. Use .control-group with .control-label, .control, and .help-block
D. Use .group-form with .label-group, .input-group, and .feedback-group
Q.79 How can you create a group of checkboxes that are vertically stacked and each has the same name in Bootstrap?
A. Use .form-check stacked with .form-check-label
B. Use .checkbox-group
C. Use .form-checkbox-group
D. Use .form-check with .form-check-input
Q.80 Which class is added to form elements to ensure they take the full width of their parent container in Bootstrap?
A. .full-width
B. .w-100
C. .expand
D. .full-size
Q.81 What should be considered when using custom validation styles in Bootstrap forms?
A. Performance impact
B. Browser compatibility
C. Security implications
D. Responsive behavior
Q.82 In Bootstrap, what is the role of the .form-control class?
A. To validate form entries
B. To style form elements uniformly
C. To align form labels
D. To secure form data
Q.83 Which Bootstrap class is used to create inline forms where elements are aligned horizontally?
A. .form-horizontal
B. .form-inline
C. .form-row
D. .form-align
Q.84 How does Bootstrap enhance the accessibility of forms?
A. By adding automatic data validation
B. By using ARIA roles
C. By resizing form elements
D. By enabling AJAX submissions
Q.85 What is the primary function of the Bootstrap Form component?
A. To validate user input data
B. To layout web page structure
C. To enhance graphics
D. To gather user inputs
Q.86 What could cause a Bootstrap Carousel to not cycle automatically as expected?
A. Incorrect data-ride attribute
B. Improperly configured interval
C. Faulty image links
D. Missing controls
Q.87 Why might a Bootstrap modal not appear when triggered?
A. Missing data-target attribute
B. Incorrect linkage to Bootstrap JS
C. Faulty CSS overrides
D. Incorrect button type
Q.88 What should be checked if Bootstrap tooltips are not initiating?
A. jQuery inclusion
B. Proper placement of data attributes
C. Link to Bootstrap CSS
D. Presence of popper.js
Q.89 If a Bootstrap dropdown menu is not working, what is a common thing to check?
A. The data-toggle attribute
B. The href attribute
C. The role attribute
D. The type attribute
Q.90 How can you create a vertical group of buttons using Bootstrap?
A. Use .btn-group with .btn-group-vertical
B. Use .btn-vertical
C. Use .vertical-group
D. Use .btn-group with .vertical
Q.91 What advanced CSS feature is commonly utilized in Bootstrap for layout design that involves alignment and spacing?
A. Flexbox
B. Grid system
C. CSS animations
D. Media queries
Q.92 How does the use of Bootstrap’s utility API affect the performance and maintenance of a web project?
A. Increases maintenance complexity
B. Reduces the need for custom CSS
C. Increases load times
D. Both increases maintenance complexity and reduces the need for custom CSS
Q.93 What is the purpose of using Bootstrap’s mixins in a project?
A. To add JavaScript functionality
B. To simplify CSS coding and reuse styles
C. To link external APIs
D. To enhance security measures
Q.94 How do you resolve conflicts between Bootstrap’s JavaScript and jQuery versions when used in the same project?
A. Update all scripts to the latest version
B. Isolate Bootstrap’s jQuery to a specific version
C. Replace jQuery with a modern alternative
D. Reorder script loading
Q.95 What common issue should be checked if Bootstrap styles are not applying in an Angular project?
A. The scope of styles in components
B. Angular version compatibility
C. The ordering of script tags
D. Incorrect module imports
Q.96 How can Bootstrap’s grid system be used effectively in a React application for dynamic content rendering?
A. By manipulating DOM directly with jQuery
B. By using React state to dynamically assign grid classes
C. By using inline styles
D. By using CSS Grid instead of Bootstrap
Q.97 What is the best practice for integrating Bootstrap components into a Vue.js application?
A. Directly modifying the DOM in components
B. Using Vue directives to manipulate Bootstrap components
C. Importing BootstrapVue
D. None of the above
Q.98 How do you correctly add Bootstrap to a Node.js Express application?
A. By installing via NPM and serving through a static directory
B. By linking directly to a CDN in server-rendered views
C. By embedding Bootstrap files in JavaScript files
D. By using a Bootstrap middleware
Q.99 In a WordPress theme, what must be adjusted to ensure Bootstrap’s styles and scripts do not conflict with WordPress’s default setup?
A. Function hooks
B. Widget areas
C. The loop structure
D. Enqueue scripts and styles
Q.100 When using Bootstrap with server-side technologies like ASP.NET,
what is a key integration aspect?
A. Server control IDs
B. Page load speed
C. Security protocols
D. Database connections
Q.101 What should be considered when integrating Bootstrap with a JavaScript framework like Angular?
A. Scope handling
B. Data binding conventions
C. Change detection
D. All of the above
Q.102 How does Bootstrap complement React in web development?
A. By replacing React’s components
B. By enhancing UI responsiveness
C. By managing backend services
D. By optimizing database interactions
Q.103 What might cause Bootstrap’s media queries to not apply correctly at certain breakpoints?
A. Incorrectly ordered CSS rules
B. Missing breakpoints in the CSS
C. Overwritten Bootstrap styles
D. Incorrect use of media query syntax
Q.104 If a Bootstrap layout is not adjusting as expected on small devices, what should you first check?
A. The use of responsive meta tags
B. The linkage of the Bootstrap CSS file
C. The viewport settings
D. All connected media queries
Q.105 What Bootstrap class combination is best for creating a layout that stacks columns vertically on small screens and horizontally on medium and larger screens?
A. .col-sm-12 .col-md-6
B. .col-xs-12 .col-lg-6
C. .col-12 .col-md-6
D. .col-12 .col-lg-6
Q.106 How can you make a video responsive in Bootstrap so it maintains aspect ratio as the viewport changes?
A. Wrap the video in a container with the .embed-responsive class
B. Use the .video-responsive class
C. Use the .video-scale class
D. Apply .aspect-ratio to the video
Q.107 Which class is used to ensure that an image is responsive and scales with the parent element in Bootstrap?
A. .img-responsive
B. .img-scale
C. .img-fluid
D. .responsive-img
Q.108 What is a key strategy when using Bootstrap to create a web design that adjusts to multiple device orientations?
A. Using fixed-width containers
B. Using fluid containers
C. Using absolute positioning
D. Using static positioning
Q.109 How do Bootstrap’s utility classes for visibility help in responsive design?
A. By hiding or showing elements at specific breakpoints
B. By changing color schemes
C. By resizing elements
D. By changing font sizes
Q.110 What does the ‘md’ in Bootstrap’s grid class .col-md-4 stand for?
A. Medium devices
B. Medium density
C. Medium display
D. Medium design
Q.111 What is the primary function of Bootstrap’s responsive classes?
A. To add animations to elements
B. To dynamically change the layout based on screen size
C. To enhance security features
D. To integrate third-party APIs
Q.112 How can you troubleshoot issues with Bootstrap’s JavaScript components that appear only in certain browsers?
A. Check console for errors
B. Verify browser compatibility
C. Test on different devices
D. Reinitialize components
Q.113 What should you inspect if a Bootstrap tooltip activated via JavaScript is not appearing on hover?
A. The initialization code
B. The CSS z-index properties
C. The viewport settings
D. The HTML structure
Q.114 If Bootstrap JavaScript functions are not responding as expected, what is a common issue to check?
A. Incorrect script loading order
B. Missing script files
C. Conflicts with other scripts
D. JavaScript disabled in the browser
Q.115 What JavaScript method is essential for dynamically adding tooltips to elements created after the initial page load?
A. .tooltip(‘init’)
B. .tooltip(‘reload’)
C. .tooltip(‘dispose’)
D. .tooltip()
Q.116 Which method is used to programmatically scroll a new tab into view using Bootstrap’s JavaScript API?
A. .tab(‘show’)
B. .tab(‘scroll’)
C. .scrollTo()
D. .show(‘scroll’)
Q.117 How do you programmatically hide a modal using Bootstrap’s JavaScript API?
A. $(‘#myModal’).modal(‘hide’)
B. $(‘#myModal’).hide()
C. $(‘#myModal’).close()
D. $(‘.modal’).hide()
Q.118 What is required to use Bootstrap’s JavaScript components without jQuery?
A. Use of Bootstrap’s native API
B. Rewriting components in pure JavaScript
C. Integration with another library like React
D. All of the above
Q.119 How can Bootstrap’s JavaScript components be customized to reduce load times?
A. By using a content delivery network
B. By minifying JavaScript files
C. By selectively compiling components
D. By caching pages
Q.120 Which event is important for properly handling dynamic content updates in Bootstrap, such as with AJAX?
A. .change()
B. .update()
C. .reload()
D. .ajaxComplete()
Q.121 What should be checked if custom JavaScript functionality breaks following a Bootstrap version upgrade?
A. Syntax errors in the script
B. Incompatibilities with new Bootstrap JavaScript features
C. Server-side issues
D. Browser compatibility
Q.122 After migrating to a new version of Bootstrap,
what is a common issue that might appear with responsive layouts?
A. Increased loading times
B. Broken grid layouts
C. Incorrect media query activation
D. Unresponsive buttons
Q.123 How do you ensure custom modifications to Bootstrap’s SCSS files are maintained during an upgrade?
A. Reapply changes manually after upgrade
B. Use a version control system to merge changes
C. Store customizations in a separate file
D. All of the above
Q.124 Which tool can be useful for identifying deprecated features when migrating to a newer version of Bootstrap?
A. Bootstrap migration assistant
B. Code linter
C. Version control system
D. Dependency manager
Q.125 What is the impact of Bootstrap version migration on third-party plugins and integrations?
A. They will automatically update
B. May need to be replaced or updated
C. Will become faster
D. Require less configuration
Q.126 How does updating to the latest version of Bootstrap benefit a project in terms of security?
A. Provides newer features
B. Enhances UI components
C. Fixes known security vulnerabilities
D. Improves performance
Q.127 What is a key consideration when planning to migrate to a newer version of Bootstrap?
A. Code compatibility
B. Color schemes
C. Page load speed
D. Aesthetic trends
Q.128 How can you identify and resolve performance bottlenecks related to Bootstrap’s CSS in a web application?
A. Using the browser’s developer tools to simulate slow networks
B. Using a CSS profiler
C. Both using a CSS profiler and the browser’s developer tools
D. Reviewing server logs
Q.129 If a Bootstrap page is experiencing slow load times despite optimization efforts,
what should be investigated first?
A. Server response times
B. Network conditions
C. Number of HTTP requests
D. All of the above
Q.130 How can developers ensure that Bootstrap’s JavaScript doesn’t affect the critical rendering path of a webpage?
A. By inlining all JavaScript
B. By using asynchronous loading
C. By removing all JavaScript
D. By compressing JavaScript files
Q.131 What is an effective method to defer loading of Bootstrap JavaScript files until after the main content?
A. Use the async attribute
B. Use the defer attribute
C. Place scripts at the end of the body
D. Both use the defer attribute and place scripts at the end of the body
Q.132 In what way can custom builds of Bootstrap enhance site performance?
A. By adding more features
B. By including developer tools
C. By reducing file sizes with only needed components
D. By increasing compatibility
Q.133 What role does the use of content delivery networks (CDNs) play in Bootstrap performance optimization?
A. Increases security risks
B. Decreases site reliability
C. Improves load times globally
D. Reduces functionality
Q.134 How does minimizing Bootstrap’s CSS and JavaScript files impact performance?
A. Increases load times
B. Decreases responsiveness
C. Decreases load times
D. None of these
Q.135 How do you diagnose issues in a Bootstrap site where specific CSS styles fail to apply only in automated test scenarios?
A. Check the loading order of stylesheets
B. Check for missing style declarations in the CSS file
C. Simulate the scenario manually
D. Check the automated test script for errors
Q.136 When a Bootstrap element behaves unexpectedly in a test environment but not in production,
what should be investigated?
A. Differences in data handling
B. Differences in environment configurations
C. Server response times
D. Browser type used for testing
Q.137 What is a common issue to check if a Bootstrap tooltip does not show during testing?
A. JavaScript conflicts
B. Incorrect data attributes
C. CSS overrides
D. Both JavaScript conflicts and incorrect data attributes
Q.138 How would you set up a unit test to verify that a Bootstrap dropdown functions as expected under different user roles?
A. By creating separate tests for each role
B. By changing user roles dynamically in one test
C. By only testing the default user role
D. By using a test database
Q.139 What is a practical approach for writing a test case to check if a Bootstrap modal opens correctly when a button is clicked?
A. Using JavaScript alerts
B. Simulating the button click and checking the modal state
C. Logging the button’s onclick event
D. Checking the button’s href attribute
Q.140 In the development of Bootstrap sites, why is it critical to perform regression testing after each update?
A. To check new features
B. To ensure previous functionalities are not broken
C. To speed up the website
D. To decrease the website’s downtime
Q.141 What is the importance of accessibility testing in the context of Bootstrap websites?
A. To comply with legal standards
B. To increase site traffic
C. To reduce bandwidth usage
D. To enhance security
Q.142 How can automated testing tools be utilized for Bootstrap components?
A. To check syntax errors
B. To ensure cross-browser compatibility
C. To validate HTML only
D. To measure performance metrics
Q.143 What type of testing is essential to ensure a Bootstrap site’s responsiveness across different devices?
A. Unit testing
B. Integration testing
C. Responsive testing
D. Load testing
Q.144 What should be considered when implementing custom interactive components in Bootstrap to maintain accessibility?
A. The color contrast ratios
B. The use of JavaScript for interaction
C. The keyboard accessibility and focus management
D. The use of CSS animations
Q.145 What is the significance of using semantic HTML in Bootstrap for accessibility?
A. It helps in SEO
B. It simplifies page styling
C. It improves user navigation and screen reader effectiveness
D. It reduces page load times
Q146 How does Bootstrap ensure that its components are accessible to screen readers?
A. By using ARIA roles and properties
B. By limiting color usage
C. By using only keyboard navigation
D. By implementing custom JavaScript solutions
Q.147 If changes to Bootstrap’s SCSS variables do not reflect in the final CSS,
what could be the issue?
A. Incorrect variable names
B. The SCSS file is not properly linked
C. Compilation errors
D. Both incorrect variable names and compilation errors
Q.148 When Bootstrap’s CSS doesn’t apply as expected,
what is a common factor to check regarding the stylesheet’s integration?
A. The order of CSS file links
B. The version of Bootstrap used
C. The specificity of custom CSS rules
D. Both the order of CSS file links and the specificity of custom CSS rules
Q.149 What is the correct method to create a responsive typography scale in Bootstrap using SCSS?
A. Use the $font-sizes map and set values across breakpoints
B. Use media queries directly in the SCSS file
C. Override Bootstrap constants
D. Implement CSS rules in the HTML
Q.150 How do you apply a custom shadow using Bootstrap’s utilities for a card component?
A. Use .shadow-custom with appropriate CSS values
B. Modify the .card class in CSS
C. Use a .card-shadow utility with custom properties
D. Apply CSS directly to the card element
