Digital Solutions flashcards

44 QCE Digital Solutions cards across 2 modules (4 definitions, 40 key facts, 0 fill-the-gap, 0 formulas). Each session gives you 20 cards, due cards first. Swipe right for easy, left for hard, down for again. Keyboard: Space to flip, 1 to 4 to rate.

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Sample cards from this deck

Definition
User experience and accessibility for QCE Digital Solutions Unit 3
Define Accessibility
Accessibility is whether people with disabilities (vision, hearing, motor, cognitive) can use the solution at all.
Definition
Hashing, checksums and integrity for QCE Digital Solutions Unit 4
Define Encryption
Encryption is two-way: data is transformed with a key and can be decrypted back to the original. Its goal is confidentiality.
Key fact
Algorithms and pseudocode for QCE Digital Solutions Unit 3
Tell me about Iteration
A pre-test loop checks the condition before the body, so it can run zero times. A count-controlled loop runs a known number of times.
Key fact
Complex data exchange requirements for QCE Digital Solutions Unit 4
Tell me about Functional requirements of the exchange
Each should be specific enough to test in your prototype evaluation.
Key fact
Data structures for QCE Digital Solutions Unit 3
Tell me about One-dimensional collections: arrays and lists
When you have many values of the same kind, a single collection is far better than dozens of separate variables. A one-dimensional array or list stores an ordered sequence accessed by a zero-based index.
Key fact
Data compression for QCE Digital Solutions Unit 4
Tell me about Lossless compression
Lossless compression reduces size by removing redundancy in a way that lets the exact original be reconstructed. No information is lost, so it is essential for text, code, spreadsheets and any data where an exact copy is required.
Key fact
Data validation and integrity for QCE Digital Solutions Unit 3
Tell me about Validation versus verification
A birth year of 1850 passes verification if it was typed accurately, but fails validation because it is out of a sensible range.
Key fact
Data exchange design tools for QCE Digital Solutions Unit 4
Tell me about Data exchange diagrams
A data exchange diagram is a visual model of how data moves between the systems in your solution. It shows each system as a box, the data flowing between them as labelled arrows, and the direction and trigger of each exchange.
Key fact
Relational databases and SQL for QCE Digital Solutions Unit 3
Tell me about Normalisation
Normalisation organises fields so each fact is stored once, which prevents update anomalies. Storing a student's name in every enrolment row is redundant; if the name changes you must edit many rows and risk inconsistency.
Key fact
Data exchange methods, JSON and APIs for QCE Digital Solutions Unit 4
Tell me about APIs and requests
An API (application programming interface) is the contract that defines how one system asks another for data: which endpoints exist, what parameters they take and what they return. A web API is accessed over HTTP.