📝 Types of multimedia data in computer networks (7 MCQs)
📖 From Data Communication and Networks • 28. Multimedia • 7 questions available
What is Types of multimedia data in computer networks?
Types of multimedia data in computer networks include discrete media such as text and still images that are independent of time, and continuous media such as audio and video that are time-dependent and require strict synchronization, specific bandwidth, and low latency to maintain acceptable playback quality during transmission.
📝 All Types of multimedia data in computer networks MCQs
Q1. Which character set is most widely used to represent symbols in textual data on the Internet?
📖 Explanation: Unicode provides a universal mapping of characters from virtually all writing systems, allowing consistent representation across platforms. While ASCII covers only basic English characters, Unicode includes them and many more, making it the standard choice for Internet text storage and exchange.
Q2. A lossless compression algorithm reduces a text file to 60 % of its original size. If, after decompression, some bits are altered, which of the following outcomes is most likely?
📖 Explanation: Lossless methods guarantee that decompression reproduces exactly the original bit sequence. Any alteration means the integrity of the data is compromised, which defeats the purpose of lossless compression. Consequently the recovered file no longer matches the source, leading to corrupted information.
Q3. Consider two images of the same dimensions: Image X is a black‑and‑white fax page (bit depth = 1) and Image Y is a grayscale photograph (bit depth = 8). Which statement correctly compares their storage requirements?
📖 Explanation: Storage size is proportional to bit depth. With the same pixel count, a grayscale image using 8 bits per pixel stores eight times as many bits as a 1‑bit black‑and‑white image. Therefore Image Y needs roughly eight times the storage of Image X.
Q4. A digital image has a resolution of 1920 × 1080 pixels and uses a 24‑bit color depth. Using the formula , what is the approximate storage size in megabytes (MB) for the uncompressed image? (1 MB = bytes)
📖 Explanation: Multiplying width (1920) by height (1080) gives 2,073,600 pixels. Multiplying by 24 bits yields 49,766,400 bits. Dividing by 8 converts to 6,220,800 bytes. Dividing by 1,048,576 bytes per MB gives about 5.94 MB, which rounds to 5.9 MB.
Q5. Plaintext presents text linearly, while hypertext allows nonlinear navigation. Which of the following best illustrates a direct consequence of using hypertext instead of plaintext?
📖 Explanation: Hypertext embeds hyperlinks within the document, enabling readers to jump to other parts of the same document or external resources instantly. This non‑sequential navigation is the hallmark difference from plain linear text, where reading proceeds strictly from start to finish.
Q6. When streaming video, choosing a 24‑bit color depth versus an 8‑bit palette impacts bandwidth. Which statement accurately reflects this trade‑off?
📖 Explanation: Bandwidth scales with the amount of data transmitted per frame. An 8‑bit palette uses one‑quarter the bits of a 24‑bit representation, reducing the raw data rate by about 75 %. However, the limited color range often introduces banding artifacts, illustrating the quality‑vs‑bandwidth trade‑off.
Q7. An archive contains text, grayscale images, and audio clips. To preserve all original information while minimizing total storage, which combination of compression methods should be employed?
📖 Explanation: Text must remain exact, so lossless compression (e.g., Huffman or LZW) is required. Grayscale images can be stored losslessly with PNG, preserving pixel values. Audio should also be losslessly compressed using FLAC to retain fidelity. This combination ensures no information is lost while reducing size.