Treasure Inspiration
Data Representation
T

Advanced Binary, Hex and Multimedia Data

GCSE-style stretch. Expect multi-step reasoning and exam vocabulary.

Computer Science · Hard

5

questions · ~4 min · 3 hints each (−5 pts)

Confidence tracking, 3-tier hints and instant feedback.

What you'll learn

Each question helps you build key knowledge and skills.

  • 1Two's complement is used to represent negative numbers in binary, where the leftmost bit represents a negative place value.
  • 2Binary shifts can cause overflow when significant bits are lost off the end of a fixed-size register during a left shift.
  • 3Colour depth determines how many bits are used per pixel, and the number of possible colours is found using 2 raised to the power of the number of bits.
  • 4Digital audio quality depends on both the sample rate, which is how often sound is measured, and the bit depth, which is how precisely each sample is stored.
  • 5Lossless compression preserves every detail of the original file and can be fully reversed, while lossy compression permanently removes some data to save more space.

Question mix

A mix of question types to build your skills.

  • Multiple choice×3
  • Short answer×1
  • True / False×1

Different question types help you think in different ways.

How it works

A simple 3-step process

  1. 1

    Rate your confidence

    Tell us how sure you feel before answering. It helps us understand your starting point.

  2. 2

    Use hints if stuck

    Get up to 3 helpful hints per question. Each hint costs 5 Treasure Points.

  3. 3

    See what went wrong

    Get instant feedback with clear explanations, so you can learn and improve.

Ready when you are

This takes about 4 minutes.