Exam preparation beginner

The beginner exam is the day after tomorrow. Today you go through everything you need for it once more. Write down where you are unsure and look up the matching lesson.

The instructions of the level#

The traps#

• Program end: if the chip runs past the last line, it stops for good. Every control needs j start.
• No yield: the chip runs 128 instructions and continues in the middle of the loop during the next tick. No error, but all values are the same 128 times.
• sleep on line 0: never put it at the very beginning.
• Numbers: dot instead of comma, no 1e5. $FF and %1010 are allowed.
• define with define: define B A gives NaN, without an error message.
• Batch modes: Average returns NaN when no device matches, Sum adds up sensors with the same name. For readings always use Average.
• Names: with lbn type and name must match. Device names ASCII only.
• Bare LogicTypes: move r0 Temperature is an error, at number positions it is LogicType.Temperature.

How the exam works#

The exam on day 91 draws 20 questions from a larger pool, you have 40 minutes and need 70 %. You do not have to write code, but you do have to read it. Work along line by line, as in lesson 85.

move r0 7
div r0 r0 2        # r0 = 3.5
floor r1 r0        # r1 = 3
sgt r2 r0 3        # r2 = 1
select r3 r2 10 20 # r3 = 10