KHAN ACADEMY DIGITAL INFORMATION TEST 2024 ACTUAL QUESTIONS AND ANSWERS SOLVED CORRECTLY

KHAN ACADEMY DIGITAL INFORMATION TEST 2024 ACTUAL QUESTIONS AND ANSWERS SOLVED CORRECTLY Eino is composing a short film about climate change which he plans to display at a science museum and on his public YouTube channel. He searches a video streaming website and finds a video clip with a time lapse of melting ice caps that would be perfect for the film. Assuming US copyright laws, is Eino allowed to use the video clip for his film? Ans- He can use the video clip if it is explicitly licensed for re-use, like with a Creative Commons license, and he follows the conditions of that license. GIMP is an open source photo editing application that gives you a variety of ways to manipulate photos. Categorize each operation as either "lossless" or "lossy": Ans- Crop: Trims the sides of the image. - LOSSY Grayscale: Converts the photo to black & white (256 shades of grey). - LOSSY Invert: Inverts all the pixel colors and brightness values (i.e. black pixels become white pixels). - LOSSLESS Consider this sequence of bits: How many bytes long is that sequence of bits? Ans- 3 What is true about the process of converting analog data into digital data? Ans- The digital version is a representation of the analog data but cannot include all of the details. Modern car dashboards contain a number of visual indicators to help drivers be safer, more responsible drivers. Which of these indicators could be represented by a single bit? Ans- - The warning icon that indicates a seat belt isn't fastened - The "ECO" label that indicates the car is in fuel efficiency mode (versus standard fuel mode) You're visiting a Computer Science building at a college, and they've decided it'd be fun to display all the room numbers in binary. You're going to room 13. What binary number should you look for on the door of room 13? Type the binary number without any spaces: Ans- 1101 Run-length encoding (RLE) is a data compression technique that replaces "runs" (sequences of bits with the same value) with a number representing the length of the run. RLE can be used to compress color images, especially when the colors are from a limited palette. The following is a run-length encoding of an 8x8 icon with 3 colors. "R" signifies a red run, "G" signifies a green run, and "Y" signifies a yellow run. 3Y,2R,3Y 2Y,1R,2G,1R,2Y 1Y,1R,4G,1R,1Y 1R,6G,1R 1R,6G,1R 1Y,1R,4G,1R,1Y 2Y,1R,2G,1R,2Y 3Y,2R,3Y What does this icon look like? Ans- A diamond A cryptocurrency decides to use 6-bit hexadecimal numbers to refer to each block in their blockchain. The first block is 000000, the second block is 000001, etc. Which of these lists correctly sort block numbers from lowest to highest? 03CE1B, 0A8FE3, 742EE8, 8FD758, 935041, BF0402 Ans- 03CE1B, 0A8FE3, 742EE8, 8FD758, 935041, BF0402 In the classic arcade game Donkey Kong, the code calculates the time allowed per level by multiplying the current level by 10 and adding 40. On level 22, that calculated time is 260. However, the game displays a time of 4 instead of 260. It is impossible for anyone to complete the level in just 4 seconds, so no player ever makes it past level 22. What is the most likely cause of the level 22 bug? Ans- Integer overflow error Tom is recording an album of songs using a digital audio recording application, and he wants the recordings to be high quality. Which advice will best help him to achieve his goal? Ans- He should save the audio using a lossless compression algorithm. ................