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IT Specialist INF-306 Exam Syllabus Topics:

SectionObjectives
Topic 1: CSS Styling- Selectors and styling rules
  • 1. Class, ID, and element selectors
    • 2. CSS specificity and cascade
      - Layout and responsive design
      • 1. Flexbox and grid fundamentals
        • 2. Media queries and responsive layouts
          Topic 2: JavaScript Programming- Core JavaScript concepts
          • 1. Functions and control flow
            • 2. Variables, data types, and operators
              - DOM manipulation
              • 1. Selecting and modifying DOM elements
                • 2. Event handling
                  Topic 3: Web Application Development Concepts- Media and APIs
                  • 1. Embedding multimedia elements
                    • 2. Basic web APIs usage
                      - Client-side storage
                      • 1. LocalStorage and SessionStorage usage
                        Topic 4: HTML Fundamentals- Document structure and semantics
                        • 1. Semantic elements (header, nav, section, article, footer)
                          • 2. HTML5 document structure (doctype, head, body)
                            - Forms and input elements
                            • 1. Form controls and validation attributes
                              • 2. Input types and accessibility considerations

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                                2026 Professional IT Specialist INF-306: HTML5 Application Development Reliable Practice Questions

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                                IT Specialist HTML5 Application Development Sample Questions (Q53-Q58):

                                NEW QUESTION # 53
                                You have created custom error messages for a form. When a user attempts to submit the form with invalid data, the data must remain in the form and error messages must be displayed. Which Event property or method should you use?

                                Answer: C

                                Explanation:
                                The correct method is preventDefault(). During form submission, the browser's default behavior is to submit the form to the target URL, which may navigate away from the current page or reload it. If the submitted data is invalid and the application must display custom error messages while preserving the entered values, the submit event handler should call event.preventDefault(). This cancels the default submit action, allowing the page to remain in place and the script to display validation feedback next to the relevant form controls.
                                defaultPrevented is not the method to use; it is only a Boolean property that indicates whether preventDefault() has already been called. cancelable is also only informational; it tells whether the event's default behavior can be canceled. abort is unrelated to form validation and does not provide the required control over form submission. References/topics: HTML5 form validation, custom validation messages, submit event, event cancellation, preserving form data.


                                NEW QUESTION # 54
                                You are creating a form that asks a user to enter their phone number. The form must be submitted only if the phone number field is not empty and matches the format 111-444-7777. Which markup should you use?

                                Answer: B

                                Explanation:
                                The correct markup is option D. The type= " tel " input type is appropriate for telephone-number entry, but it does not automatically validate a specific telephone-number format because phone formats vary internationally. MDN notes that tel inputs allow telephone entry but are not automatically validated to a particular format. Therefore, a pattern attribute is required to enforce the exact structure. The regular expression [0-9]{3}-[0-9] {3}-[0-9]{4} requires three digits, a hyphen, three digits, another hyphen, and four digits, matching the requested format such as 111-444-7777. MDN defines the pattern attribute as a regular expression the input value must match for constraint validation. The required attribute is also necessary because the field must not be empty; MDN states that required indicates the user must specify a value before the form can be submitted. Option A only limits length. Option B lacks hyphen validation and required.
                                Option C hard-codes only specific digits. References/topics: HTML5 validation, tel, pattern, required, regular expressions.


                                NEW QUESTION # 55
                                You need to complete a postal code input form element (post_code). Include attributes to make the field mandatory, set the data type as text, and limit the input to five numeric digits.
                                Complete the code by selecting the correct option from each drop-down list.
                                Note: You will receive partial credit for each correct selection.

                                Answer:

                                Explanation:

                                Explanation:
                                First blank: type
                                Second blank: pattern
                                Third blank: required
                                The first blank must be type because the question requires the input data type to be text, producing type= " text " . The second blank must be pattern because [0-9]{5} is a regular expression that permits exactly five numeric digits. The third blank must be required because the postal code field must be mandatory before the form can be submitted.


                                NEW QUESTION # 56
                                You need to use CSS to create the layout shown:

                                Review the layout shown on the left.
                                Complete the markup by selecting the correct option from each drop-down list.
                                Note: You will receive partial credit for each correct selection.

                                Answer:

                                Explanation:

                                Explanation:
                                First blank: display: grid;
                                Second blank: grid-template-columns: auto auto auto auto;
                                Third blank: grid-gap: 10px;
                                The layout shown is a CSS Grid layout with eight items arranged into four equal-width columns and two rows. The first required declaration is display: grid;, which turns the .grid-container element into a grid container. The second declaration is grid-template-columns: auto auto auto auto;, which defines four columns, matching the four visible boxes in each row: Mickey, Minnie, Luna, and George on the first row, then Bilbo, Bella, Madeline, and Groucho on the second row. The third declaration is grid-gap: 10px;, which creates spacing between the grid cells, matching the visible blue gaps around each item. The background-color:
                                #336699; creates the blue container background, while padding: 10px; adds space around the outer edge of the grid. The child rule .grid-container > div styles each grid item with a light background, centered text, padding, and larger font size.


                                NEW QUESTION # 57
                                Which two CSS segments are valid filter properties? Choose 2.

                                Answer: A,D

                                Explanation:
                                The valid filter declarations are filter: opacity(25%) and filter: drop-shadow(16px 16px 16px red). The CSS filter property applies graphical effects to an element, commonly including image rendering effects such as blur, contrast, color shifts, transparency, and shadows. opacity(25%) is a valid filter function because filter opacity accepts a percentage or number to control the rendered transparency of the element. drop-shadow (16px 16px 16px red) is also valid because drop-shadow() is a CSS filter function, and MDN shows that it accepts two or three length values plus an optional color. box-shadow(...) is invalid in this context because box-shadow is a standalone CSS property, not a filter function; MDN explicitly distinguishes drop-shadow() from the box-shadow property. blur(25deg) is invalid because blur uses a length value such as pixels, not an angular value such as degrees. References/topics: CSS filter property, image effects, opacity filter, drop- shadow filter, valid filter-function syntax.


                                NEW QUESTION # 58
                                ......

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