Logic Systems N3 — Memo

December 2023 — N3 — Logic Systems

N3 2023 Nated Engineering

↓ Download PDF 📄 615.8 KB

Preparing document

📋 Document Analysis

📄 9 pages 📝 33 items found 🔑 1 key info

See full analysis

Questions — A Preview of What to Expect in the Document

This section provides a quick preview of questions from the document. It may not display every question or the complete wording of each one. For the full content, including diagrams, tables and other information, view the original PDF above.

Q1— Section header —

1.2A `half subtractor is used to subtract two binary numbers from each other and provides an output in the form of difference and borrow. 1100

0.2525,5 (10\

1.4[20]20

Q2— Section header —

2.1.1Hamming code is a method used to detect error in data communication by adding parity bits to the data being transferred.

2.1.2The characteristic of the s elf complementing code is that the weight values add up to a total of

2.1.3ASCII c ode is a seven bit alphanumeric code used for information interchange.

2.1.4Weighted code is any code which the value of each bit is defined or carries a specific weight.

2.1.5EBCDIC code is an eight bit per character code used by large computers. (5\

2.2Positions Positions 1,3,5,7,9 + 1 + 1 + 1 + 0

2.3.11010 1000 0101 101010000101 XS3 CODE = 752

2.3= 110001100 GRAY CODE [20]20

Q3— Section header —

3.1.1Ground or arth

3.1.2Vcc or Vsupply

3.2.3(3 (9\

3.3.1polar ICs usually opera te from an input voltage of +/ V while MOS circuits operate

3.4(3\ [20]20

Q4— Section header —

4.1peed at which data is available Speed at which write in or read out cycles can be completed Power required by the memory Storage cost measured per bit Convenience of whether or not the data can be lost in

4.2.5

4.3.1Leading edge triggered flip flop means that the flip flop reacts on the positive edge of the clock pulse when it is changing from 0 to 1.

4.3.2

4.420

Q5— Section header —

5.1.1Delay time is the time which elapses from the time the input pulse reaches 10 % of its maximum until the output signal has reached 10 % of its maximum.

5.1.2Storing time is the time which elapses from the time the input pulse reaches 90 % of its maximum to the time the output pulse reaches 90 % of its maximum.

5.1.3Switch on time is the time w elapses from the time the input signal first reaches 10 % of its maximum until time the output signal first reaches 90 % of its maximum.

5.1.4Switch off time is the time which elapses from the time the input signal reaches 90 % of its maximum for the second time until the output signal reaches 10 % of its maximum value for the second

5.2Module 7 counter is a counter which counts seven positions from 0 to 6 and then switches back to the original position. (2\

5.3A ring counter is a circulating register that contains only one 1 and the rest are zeros. Usually the one 1 is the least significant bit. (2\

5.4(8\ [20] TOTAL:20

Mark Allocation

Sections20 + 20 + 20 + 20 + 20 = 100 marks

Key Information

Contact Number0101000010

Paper information

TitleMemo

SubjectLogic Systems

LevelN3

Document typeNated Engineering

Year2023

MonthDecember

Pages9

Downloads4

Examination context

Decade2020s

Years ago3y

SeasonSummer (SH)

Start dayFriday

Exam periodDecember 2023

Days since exam1,046

About Logic Systems examination preparation

This TVET examination resource can be used as part of a structured revision programme. Past papers are most useful when learners attempt questions independently, work within a realistic time limit, and review their answers afterwards.

How to use this resource for revision

A TVET past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

applying subject knowledge

working under time constraints

checking answers

identifying revision priorities

A practical revision approach

Start by completing the resource without looking at the memorandum. Review incorrect and incomplete answers afterwards and make a short revision list based on the areas that caused difficulty.

File details

File size615.8 KB

Pages9

Archived on8 September 2026

File age47d

ContributorFreeMode

FingerprintFCA564175D7A

Questions and learner discussion

No questions or discussions have been posted yet.