Logic Systems N2 — Memo

November 2022 — N2 — Logic Systems

N2 2022 Nated Engineering

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Q1— Section header —

1.1XOR gate OR The output will be 1 when the in inputs are unequal(either HIGH or LOW\ and the output will be 0 when both inputs are the same (2\

1.2.2The output of a NOT gate is a complement of the input. OR The output of the NOT gate is opposite to that of the input (2\

1.3OR gate Truth table NOT gate Truth table (4\

1.3.2OR gate IEC symbol NOT gate IEC symbol (2\ Therefore 36 = 10010

1.4Therefore 15 = 1111 (2\

1.51 0 0 1 0 0 + 1 1 1 1 11 0 0 1 1 Therefore 32+16+2+1= 51 110011 Code (3\

1.51 0 0 1 0 0 1 1 1 1 10 010 1 Therefore 16+4+1= 21 Code

1.625

Q2— Section header —

2.1.90001 0010 0011 0100 0111 1100 1101 1110 1111

2.2Codes are usually used for security purposes.

2.34221 Code gives the code number of 9 is any digit between 0 and 9. (10\ [25]25

Q3— Section header —

3.1Volatile memories will only retain information for as long as there is power supplied to the device. Secondary memor : This memory is used for long term storage of data This memory is separated from the primary memory and

3.4(5\

3.5.3NOR gate (12\ [25]25

Q4— Section header —

4.1Four flip flops (1\

4.230 clock pulses (2\

4.3(10\

4.4.1FALSE

4.4.2TRUE

4.4.3TRUE

4.4.4TRUE

4.4.5FALSE (5 X 1\ (5\ Clock wave(pulse\ Pre set pulse Pre rese pulse A Johnson counter is a

Mark Allocation

Sections25 + 25 + 25 + 25 = 100 marks

Paper information

TitleMemo

SubjectLogic Systems

LevelN2

Document typeNated Engineering

Year2022

MonthNovember

Pages6

Downloads2

Examination context

Decade2020s

Years ago4y

SeasonSpring (SH)

Start dayTuesday

Exam periodNovember 2022

Days since exam1,442

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.

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File size301.1 KB

Pages6

Archived on8 September 2026

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