Logic Systems N2 — Document

April 2019 — N2 — Logic Systems

N2 2019 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 32 items found 📚 1 topics

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Q1— Section header —

1.1To which radix do the following number systems belong:

1.1.1Decimal system

1.1.2Binary system (2 1\ (2\

1.2Perform the following calculations in the binary number system then convert the final answer to decimal number system. Show ALL conversions and calculations clearly.

1.2.133 10 15 10

1.2.21 1001 10

1.2.313 10 10 (3 5\ (15\

1.3Draw an IEC symbol and truth table that would satisfy the following Boolean equation:

1.3.2(2 4\ (8\ [25

Q2— Section header —

2.1What is meant by a weighted code? (2\

2.2Give the BCD values of 175 in:

2.2.12421 BCD

2.2.28421 BCD

2.2.3Excessive 3 (3 3\ (9\

2.3What is the function of the following:

2.3.1Encoder

2.3.2Decoder (2 2\ (4\

2.4Draw a truth table indicating the conversion of a BCD to excess 3 code. (10\ [25 8080262

Q3— Section header —

3.1Give five types of secondary memories. (5\

3.2Various options are given as possible answers to the following questions. Choose the answer and write the letter (A D\ next to the question number (3.2.1

3.2.5\ith its motivation in the ANSWER BOOK.

3.2.1How is a J K flip flop made to toggle? J = 0, K = 0 J = 1, K = 0

3.2.2In J K flip flop, no change condition appears when

3.2.3The truth table for an S R flip flop has how many VALID entries?

3.2.4If Q = 0 on flip flops , the output is said to be Set Reset

3.2.5The output of latches will remain in set/reset until the trigger pulse is given to change the state. any pulse is given to go into previous state.

3.3Study FIGURE 1 below and draw the appropriate logic circuit that is associated with it. FIGURE 1 (5\ [25

Q4— Section header —

4.1What is the difference between parallel in/parallel out and series in/parallel out shift registers?

Topics Identified

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Mark Allocation

Total100 marks

Paper information

TitleDocument

SubjectLogic Systems

LevelN2

Document typeQuestion paper

Year2019

MonthApril

Pages5

Downloads4

Examination context

Decade2010s

Years ago7y

SeasonAutumn (SH)

Start dayMonday

Exam periodApril 2019

Days since exam2,750

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

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