Logic Systems N4 — Document

August 2019 — N4 — Logic Systems

N4 2019 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 26 items found 🔑 1 key info

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Questions — A Preview of What to Expect in the Document

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Q1— Section header —

1.1Write down the symbols of the hexadecimal number system. (1\

1.2What was the ori ginal function of the Gray code (2\ Write down the name of a non weigh self inverting code. State TWO main differences between

1.5Simplify each of the following Boolean expressions

1.5.1AB+AB

1.5.2A(AB+C\

1.5.3AA+AA

1.5.4AB+BC+A1

1.6Determine the simplest Boolean expression for the Karnaugh maps given below. Redraw each Karnaugh map and show the groupings.

1.6.3(3 (6\

1.7Draw the symbols of a master/slave flip flop and clearly indicate the external connec tions necessary to make it toggle. (4\ [20]20

Q2— Section header —

2.1Convert each of the following numbers to their BINARY equivalents and then complete the calculations in the binary number system. Show ALL conversions.

2.1.1

2.1.2810 12,110,3 Encode or decode the following numbers/codes:

2.2The 8421 BCD code to its decimal equivalent. (3\

2.2168 decimal to Gray code [25]25

Q3— Section header —

3.1Draw the circuit diagram of the Boolean expression below. Do NOT change or simplify the expression:

3.1.1____________ _____ F=(ABABC\(ABC\

3.1.2F=ABBCABC

3.1.3_____ _____ F(ABCABC\[A(BC\] (3 (15\

3.2Simplify the Boolean expressions below by using Boolean laws. Draw the simplified circuit diagrams by using NAND gates only.

3.2.1F=A(ABC\(ABC\ABC\ [25]25

Q4— Section header —

Q5— Section header —

Mark Allocation

Total100 marks

Sections20 + 25 + 25 + 10 = 80 marks

Key Information

Contact Number0010111101

Paper information

TitleDocument

SubjectLogic Systems

LevelN4

Document typeQuestion paper

Year2019

MonthAugust

Pages5

Downloads2

Examination context

Decade2010s

Years ago7y

SeasonWinter (SH)

Start dayThursday

Exam periodAugust 2019

Days since exam2,627

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 size219.2 KB

Pages5

Archived on8 September 2026

File age46d

ContributorFreeMode

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