Objective 2.3 Work with Textual, Numerical, Audio, or Video Data Formats AIP-210 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   For a machine learning task that involves analyzing customer reviews as free-form text, which data format would be most appropriate to store the raw text for preprocessing?

   • ACSV
   • BJSON
   • CWAV
   • DMP4
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A research lab is building a model to detect respiratory anomalies from lung sounds. They have stethoscope recordings collected at 44.1 kHz in WAV format. The model will be deployed on a low-power edge device with limited storage. The team wants to reduce the data size while preserving diagnostic frequencies (up to 2 kHz). What is the most appropriate approach?

   • ADownsample the WAV files to 4 kHz and store as 16-bit PCM WAV
   • BKeep the original 44.1 kHz WAV files, since higher sampling rate always preserves more information
   • CConvert the WAV files to FLAC without downsampling
   • DConvert the WAV files to MP3 at 128 kbps
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A healthcare startup receives patient intake forms from multiple clinics. Each clinic sends the data in a different format: one sends CSV, one sends JSON, and one sends XML. The ML team needs to build a unified dataset for a readmission-risk model. What is the most robust approach?

   • AConvert all files to JSON, since it is the most flexible format
   • BAsk all clinics to standardize on CSV, since it is the simplest format
   • CLoad all files into a single DataFrame and let the ML framework handle the differences
   • DWrite separate parsers for each format and map the fields to a common schema
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   Which property of a video file refers to the number of frames displayed per second (fps) and affects the smoothness of motion?

   • ASampling rate
   • BCodec
   • CBit depth
   • DFrame rate
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   When building a model to classify images, which data format is most appropriate for storing the pixel values in a way that can be directly fed into a neural network?

   • ANumPy array
   • BJSON
   • CMP3
   • DCSV
   Reveal Solution Discussion Select an answer first