Get real INF-306 exam questions for better preparation

Which value does the following JavaScript code fragment store in the variable num?
var num = localStorage.length;

• A. Number of key-value pairs in local storage
• B. Maximum length of a character string
• C. Potential capacity of local storage
• D. Number of bytes available in local storage

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Which code segment correctly displays images with 80% transparency and a blue 8px shadow?

• A. filter: opacity(20%) drop-shadow(8px 8px blue);
• B. filter: saturate(20%) box-shadow(8px 8px blue);
• C. filter: saturate(80%) drop-shadow(8px 8px blue);
• D. filter: opacity(80%) box-shadow(8px 8px blue);

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You need to use a flexbox so that new content you add to the container appears at the highest point on a vertical list. You want to achieve this goal without specifying an order. Which value should you use for flex- direction?

• A. column-reverse
• B. row-reverse
• C. row
• D. column

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You need to draw a blue rectangle that meets these conditions:
* It is 200 by 200 pixels.
* It contains a white circle that is centered within the rectangle.
* The circle has a 50-pixel radius.
* The image should appear as follows: a blue square with a centered white circle.
Refer to the image on the left.
You need to ensure that the image scales without distortion when the page is resized. You must not be required to use JavaScript.
Complete the code by selecting the correct option from each drop-down list.
Note: You will receive partial credit for each correct selection.

Explanation:
First blank: < svg width= " 200 " height= " 200 " >
Second blank: < rect width= " 200 " height= " 200 "
Third blank: < circle cx= " 100 " cy= " 100 " r= " 50 "
Fourth blank: < /svg >
The correct solution uses SVG because SVG graphics are vector-based and can scale without pixel distortion when the page or viewport changes. A < canvas > element would require script-based drawing logic, which violates the requirement that JavaScript must not be required. An < img > or < picture > element can display an image, but those options do not define the rectangle and circle directly in markup. The outer container must therefore be < svg width= " 200 " height= " 200 " > . The blue square is created with < rect width= " 200 " height= " 200 " fill= " blue " / > , which produces a rectangle matching the required 200-by-200 dimensions.
The centered white circle must use SVG circle geometry: cx= " 100 " and cy= " 100 " place the center at the midpoint of the 200-by-200 square, and r= " 50 " creates the required 50-pixel radius. The final closing tag must be < /svg > .

Match each property to its corresponding value for creating the CSS flexible box layout.
Move each property from the list on the left to the correct value on the right.
Note: You will receive partial credit for each correct match.

Explanation:

A CSS flexible box layout is created by applying the display property to a container with either flex or inline- flex. This establishes the element as a flex container and causes its child elements to become flex items. The flex-direction property defines the direction of the main axis and accepts row, row-reverse, column, and column-reverse, allowing items to flow horizontally, vertically, or in reverse order. The align-items property controls how flex items are aligned along the cross axis, with values such as flex-start, flex-end, and center.
The direction property controls writing direction and accepts ltr for left-to-right text flow or rtl for right-to-left text flow. Finally, order is applied to individual flex items and accepts an integer value, represented here as
"any," because any numeric order value can be used to rearrange item display order without changing the document source order. References/topics: CSS flexbox, flex containers, flex items, main axis, cross-axis alignment, writing direction, item ordering.