10 CT Analysing Data Wk2 PostQuiz

Which statement best describes lossless compression?

• Removes redundant data without changing the original information

• Permanently discards data that humans cannot perceive

• Stores data in a proprietary binary container

• Always reduces file size by at least 50%

A ZIP archive that packs several documents together uses which compression method by default?

• Run-length encoding

• Deflate (LZ77 + Huffman coding)

• Discrete cosine transform (DCT)

• Predictive coding

For which file type is lossy compression generally unsuitable?

• Photographs

• Audio podcasts

• Source code

• Streaming video

The main advantage of run-length encoding is highest when the data contains—

• High-frequency noise

• Long sequences of repeated symbols

• Randomly distributed values

• Encrypted bytes

Which pair correctly matches a compression technique with its typical domain?

• LZW – high-definition video

• H.265 (HEVC) – images with text overlays

• JPEG – still photographs

• MP3 – medical CT scans

In Australia, the primary federal legislation governing personal-data privacy is the—

• Copyright Act 1968

• Privacy Act 1988

• Spam Act 2003

• Telecommunications Act 1997

Re-identification of supposedly anonymous health records most directly violates the ethical principle of—

• Beneficence

• Justice

• Privacy and confidentiality

• Intellectual property

Algorithmic bias in a recruitment AI that filters out older applicants could lead to which legal consequence?

• Breach of competition law

• Age-discrimination complaint under anti-discrimination legislation

• Intellectual property violation

• Privacy infringement

Under the EU GDPR, the requirement that data be collected only for explicit, legitimate purposes is called—

• data minimisation

• purpose limitation

• storage limitation

• integrity and confidentiality

Publishing interactive maps that pinpoint individuals’ addresses without consent most clearly risks—

• data sovereignty infringement

• geospatial coordinate drift

• doxxing and personal-safety harms

• loss of database normalisation