Logic Systems N2 — Document

April 2021 — N2 — Logic Systems

N2 2021 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 39 items found 🔑 1 key info

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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 —

1.1To which radix do the decimal number systems belong? (1\

1.2How many different combinat ions can be indicated with four bits? (1\

1.3Convert the following decimal numbers to their binary equivalent, perform the functions as indicated and then convert the binary answer to its decimal equivalent.

1.3.145 + 66

1.3.256 23

1.3.3

1.3.4

1.4You are given the following truth table. how by means of a logic circuit that consist of an AND gate and an

2.1Convert the following numbers as indicated:

2.1.110010110101 1 XS3 to its decimal equivalent

2.1.2376 decimal to its BCD code

2.1.3

2.2raw the logic circuit for an exclusive OR gate. (4

2.3What is meant by a weighted code (2\

2.4Draw a truth tabl e i ndicating the conversion of BCD (8421\ to XS3 code (10

Q3— Section header —

3.1Various options are given as possib le answers to the following questions. Choose the answer and write only the letter (A D\ next to the question number (3.1.1

3.1.7\n the ANSWER BOOK.

3.1.1When all OR gate NOT gate NOR

3.1.2input circuit. 12 16

3.1.3An AND logic gate will produce a high all inputs are high at least one input is high

3.1.4input. nverter gate NOR gate XOR gate

3.1.5low inputs and a low output lo w inputs and a high output

3.1.6one of its inputs is high. NOT gate NOR gate OR gate

3.1.7A maste r / slave JK flip flop has gates in total.

3.2Give FIVE examples of no volatile memories. (5\

3.3Draw the IEC symbols of the following:

3.3.1JK flip flop

3.3.2type flip flop

3.4Draw the logic circuit for the flip

Q3— Section header —

3.5Jk flip flop is a very useful flip flop. State ONE advantage of a JK flip flop. (1

Q4— Section header —

4.1How many logic gates are used to construct a deco der? (2\

4.2Why are asynchronous counters also called series counters? (2\

4.3Provide SIX applications of a shift register. (6\

4.4Draw a neat, labelled diagram of a 4 bit parallel in series out shift register which uses D

4.525

Mark Allocation

Total100 marks

Sections25 + 25 + 25 + 25 = 100 marks

Key Information

Contact Number0010110101

Paper information

TitleDocument

SubjectLogic Systems

LevelN2

Document typeQuestion paper

Year2021

MonthApril

Pages5

Downloads3

Examination context

Decade2020s

Years ago5y

SeasonAutumn (SH)

Start dayThursday

Exam periodApril 2021

Days since exam2,018

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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