Digital Electronics N6 — Document
April 2019 — N6 — Digital Electronics
N6
2019
Nated Engineering
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Q1— Section header —
1.1Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A D\ next to the question number (1.1.1
1.14\n the ANSWER BOOK.
1.1.1A device that accepts several data inputs and allows only one at a time to appear at the output: Modem Multiplexer Demultiplexer
1.1.2The follow ing transducer relies on the See beck effect
1.1.3The difference between analogue input and digital output Resolution Conversion time
1.1.4The number of functions a digital device can perform Logical operation Branch instruction
1.2Indicate whether the following statements are T RUE or FALSE. Choose the answer and write only 'True' or 'False' next to the qu estion number (1.2.1
1.2.4\ the ANSWER BOOK.
1.2.4A thermistor can be either NTC or PTC The micro instruction unit that distributes pulses in the control unit of a computer is the multiplexer
1.3Choose a term from COLUMN B that matches description in COLUMN A. Write only the letter (A F\ next to the que stion number (1.3.1
1.3.4\in the ANSWER BOOK. COLUMN COLUMN
1.3.4IC manufacturer icroprocessor ort connected directly onto the bus olatile memory
Q2— Section header —
2.1Various options are given as possible answ ers to the following questions. Choose the answer and write only the letter (A D\ next to the question number (2.1 .1 2. 1. 4\n the ANSWER BOOK.
2.1.1hich ONE of the following pieces of equipment is essential hen connecting a computer to the inte rnet across telephone wires:
2.1.2The interface that converts parallel data into serial data and vice versa Transducer
2.1.3Which ONE of the following is a widely used internet browser Windows Linux Apple
2.1.4ommunication system that requires no start and stop bits
2.2Indicate whether the following statements are T RUE or FALSE. Choose the answer and write only 'True' or 'Fal se' next to the question number (2.2.1
2.2.4\ the ANSWER BOOK.
2.2.4Modem tones can be heard by the human ear. RZ transmission means that the coded signal returns to zero between bits PCM stands for parity coded m odulation
2.3Choose a term from COLUMN B that matches description in COLUMN A. Write only the letter (A F\ next to the question number (2.3.1
2.3.4\in the ANSWER BOOK. COLUMN COLUMN .3.1
2.5A PCM system must transmit the following packages using NRZ (non return to zero\ 1000 1110 1100 0110 Use ALL FOUR bits in the string and show the
Q3— Section header —
3.1Draw a fully labelled block diagram of a control unit integrated with a random access memory (RAM\ and driven by a six bit ring counter. Include ALL
3.2Use the table below to show what ha ppens after each pulse from the micr
Q3— Section header —
Q4— Section header —
4.1Consider the following BASIC program. Follow the instruction in the remark statement and do exactly what it says. The answer in the ANSWER BOOK must be
4.2The program in QUE STION 4.1 was written in BASIC. What does the acronym BASIC stand for? (2\ 8080376
4.3Before a programmer writes any program , a systems analyst must first conduct a feasibility study to ascertain if a sys tem is worth automating or not. List SIX criteria a system analyst must address when
4.4When a program is executed it can either be real time or batch processed. Give ONE real example of each. (2\ [20]20
Q5— Section header —
5.1The followi ng word is received in Hamming code: 1000011110 hamming Find the fault in the word. Show ALL steps. Clearly state the bit number on which the fault lies and rewrite the correct word clearly indicating which bit
5.2Write the following floating point number in decimal showing ALL steps: 110 0 00011001 (3\
5.3Sol ve the following using Boolean a lgebra: (3\
5.4Rewrite the following binary number in the binary code: 1001011 gray (2\
5.5State why the XS 3 and 2.4.2.1. codes were developed. (2\ [20] TOTAL: 10020
Topics Identified
2
Business FunctionsBusiness Plan
Mark Allocation
Total100 marks
Sections20 + 20 + 20 + 20 + 20 = 100 marks
Paper information
TitleDocument
SubjectDigital Electronics
LevelN6
Document typeQuestion paper
Year2019
MonthApril
Pages9
Downloads6
Examination context
Decade2010s
Years ago7y
SeasonAutumn (SH)
Start dayMonday
Exam periodApril 2019
Days since exam2,749
About Digital Electronics 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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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
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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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