Activities
A 3.4.1 Worksheet
Use the lesson slides to help you. Answer in full sentences. The same two books are stored below in two ways: as rows in a relational table and as documents in a NoSQL database. The library has recorded...
Activities
A 3.3.3 Worksheet Answers
sql sql Jane’s Grade is stored as NULL, meaning no value. A column left out of an INSERT is set to NULL unless the table defines a default. sql sql sql sql Only Peter is changed, because John was already...
Activities
A 3.3.3 Worksheet
Insert a new student with the following details: -- Insert John Doe Insert one more student: -- Insert Peter Jones DB Browser for SQLite does not show the performance cost of index updates in a table...
Activities
A 1.1.3 Worksheet
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eBook
A 1.1.3 CPU and GPU (HL only)
The CPU is built to run anything: varied tasks, complex logic, decisions, one or a few things at a time at very low latency. The GPU is built to do one kind of work at massive scale: the same operation...
Activities
A 1.3.4 Worksheet Answers
Task 1. 1–C, 2–E, 3–A, 4–B, 5–D, 6–F. Task 2. a) Smoke alarm: interrupts. The event is rare and unpredictable but must be responded to instantly, so polling would waste effort and risk missing the moment;...
Activities
A 1.3.4 Worksheet
Name: ______________________ Class: __________ Date: __________ Command term: evaluate. Every answer must reach a judgement and give reasons. Match each consideration to the situation where it matters...
Teacher Resources (new)
A 1.3.4 Evaluating Polling and Interrupt Handling (SL and HL)
The operating system has to notice when a device needs attention, and it can either keep checking the device (polling) or wait for the device to signal (interrupt handling). Neither is better everywhere,...
eBook
A 1.1.2 The GPU
A graphics processing unit (GPU) is a co-processor which is a specialist that sits alongside the CPU and takes on the work it is built to do faster. Its speciality is applying the same operation to enormous...
eBook
A 1.1.1 The CPU
The central processing unit (CPU) carries out every instruction a computer runs, from a single addition to the millions of operations behind a video call. It contains a small set of components, and the...