Question 1

In 6 mark QWC evaluation questions, a hotel booking changeover, bitmap versus JPEG, and similar scenarios, candidates give a correct general definition of each side but never connect it back to the scenario in the question.

Accepted Answer

State the general point in one sentence, then add a second sentence saying what it means for the specific scenario given. Do this for both sides of the argument, not just one.

Question 2

Modulus 11 check digit calculations are attempted without showing the weighting order or the remainder, so a single arithmetic slip loses every mark in the calculation rather than just the accuracy mark.

Accepted Answer

Write each digit with its weight underneath, show the sum, then show the division by 11 and the remainder before stating the check digit. Method marks are available even if the final digit comes out wrong.

Question 3

Level 1 data flow diagrams connect an external entity straight to a data store, or leave data flow arrows unlabelled.

Accepted Answer

Route every flow through a process, never directly between two external entities or between an external entity and a store, and label every arrow with the data it carries.

Question 4

Functional and non-functional requirements get mixed up, candidates list a security or performance requirement when the question asks what the system must do.

Accepted Answer

Ask whether the point is a task the system carries out, which is functional, or a quality the system must have while it works, which is non-functional, before writing it down.

Question 5

Differential and incremental backup get described as the same thing.

Accepted Answer

State it precisely. Differential backs up everything changed since the last full backup. Incremental backs up only what changed since the last backup of any type, full or incremental.

Question 6

Two's complement boundary values are given as plus 128 for the maximum positive value in an 8 bit signed byte.

Accepted Answer

The maximum positive 8 bit two's complement value is plus 127, binary 01111111, because one bit pattern is reserved for zero. Learn the boundary pair, minus 128 to plus 127, as a fact rather than deriving it under time pressure.

Question 7

Fetch execute cycle answers describe fetching an instruction in general terms instead of naming the registers in the correct order.

Accepted Answer

Give the exact sequence. The address in the Program Counter copies to the MAR, the instruction at that address copies to the MDR, and the MDR content copies to the CIR. Naming registers out of order loses marks even when the general idea is right.

ฉบับ	เวลา	คะแนน	จำนวนข้อ	น้ำหนักคะแนน	ประเภทคำถาม
AS 1: Systems Development	1ชม. 30นาที	100	6	50%	Short definition / component identification, Structured description & distinction, Diagrammatic modelling (Level 1 DFD), Extended comparative evaluation (QWC Banded)
AS 2: Fundamentals of Digital Technology	1ชม. 30นาที	100	5	50%	Binary conversion & capacity calculation, Short recall / feature listing, Technical explanation & distinction, HTML coding snippet, Extended comparative evaluation (QWC Banded)

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