Prepare for your exams
Get points
Guidelines and tips

Prepare for your exams

Study with the several resources on Docsity

Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips

Sell on Docsity

Log in Sign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search Store documents

The best documents sold by students who completed their studies

Search through all study resources

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents

20 Points

For each uploaded document

Answer questions

5 Points

For each given answer (max 1 per day)

All the ways to get free points

Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

University Rankings

Discover the best universities in your country according to Docsity users

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

From our blog

Exams and Study

Go to the blog

Quick Reference - Microprocessor Systems Engineering I- Past Exam Paper, Exams of Materials science

Indira Gandhi Institute of Medical Sciences Materials science

Main points of this past exam paper are: Floating Point Data Type, System Block Diagram, Memory Device, Assembly Language Program, Microconverter Quick Reference, Microprocessor Based System., Typical Microprocessor, Block Diagram, Architecture, Modern Pc Motherboard

Typology: Exams

2012/2013

Uploaded on 03/26/2013

rana-r 🇮🇳

4.5

(31)

199 documents

1 / 5

This page cannot be seen from the preview

Don't miss anything!

EE

2

Ex

a

Ex

a

Mo

Pa

p

Re

p

Ext

e

Int

e

Ins

t

Du

r

No.

Dis

c

Co

u

Re

q

M

C

Ha

n

Sta

t

Gr

a

Lo

g

Ot

h

2

06.i Micro

p

a

m Code(s

)

a

m(s)

dule Code

(

dule(s)

p

er No.

p

eat Pape

r

e

rnal Exa

m

e

rnal Exam

i

t

ructions:

r

ation

of Pa

g

es

c

ipline

u

rse Co-or

d

q

uirement

s

C

Q

n

dout

t

istical Tab

l

a

ph Paper

g

Graph Pa

p

h

er Material

p

rocessor

S

)

2

S

(

s)

E

M

1

m

iner(s)

i

ner(s)

d

inator(s)

s

:

l

es

p

e

r

S

ystems En

g

A

utumn

2

BP121, 2

B

S

econd Ele

c

S

econd Ele

c

S

econd Sp

o

S

econd En

g

E

E206.i

M

icroproce

1

Prof. G.

W

Prof. G.

Ó

Dr. M. Gl

Answer Q

u

Question

1

Questions

2hrs

5

Electr

i

g

. 1

E

xaminat

i

B

N121, 2B

E

c

tronic and

c

tronic En

g

o

rts and Ex

e

g

ineering I

n

ssor Syste

m

W

. Irwi

n

Ó

Laighi

n

avin

uestion 1 a

n

1

is compu

l

2, 3 and 4

c

i

cal & Elec

t

i

ons 2011

E

E, 2BEI

Computer

E

ineering

e

rcise Engi

n

novation -

E

m

s Enginee

r

n

d any two

l

sor

y

and c

a

c

arry 20 m

a

t

ronic Engi

n

E

ngineerin

g

n

eering

E

lectronic

r

ing 1

other ques

t

a

rries 30 m

a

rks each.

n

eering

Page 1

g

t

ions.

a

rks.

of 5

Partial preview of the text

Download Quick Reference - Microprocessor Systems Engineering I- Past Exam Paper and more Exams Materials science in PDF only on Docsity!

EE

Exa

Mo

Pap

Rep

Exte

Inte

Inst

Dur

No.

Disc

Cou

Req

MC

Han

Stat

Gra

Log

Oth

206.i Microp

am Code(s)

am(s)

dule Code(

dule(s)

per No.

peat Paper

ernal Exam

ernal Exami

tructions:

ration

of Pages

cipline

urse Co-ord

quirements

CQ

ndout

tistical Tabl

aph Paper

g Graph Pap

her Material

processor S

S

(s) E

M

miner(s)

iner(s)

dinator(s)

s :

les

per

Systems Eng

Autumn

2 BP121, 2B

Second Elec

Second Spo

Second Eng

EE206.i

Microproce

Prof. G. W

Prof. G. Ó

Dr. M. Gl

Answer Qu

Question 1

Questions

2hrs

Electri

g. 1

Examinati

BN121, 2BE

ctronic and

ctronic Eng

orts and Exe

gineering In

ssor System

W. Irwin

Ó Laighin

avin

uestion 1 an

1 is compul

2, 3 and 4 c

ical & Elect

ions 2011

EE, 2BEI

Computer E

ineering

ercise Engin

nnovation - E

ms Engineer

nd any two

lsory and ca

carry 20 ma

tronic Engin

Engineering

neering

Electronic

ring 1

other quest

arries 30 ma

arks each.

neering

Page 1

g

tions.

arks.

of 5

EE206.i Microprocessor Systems Eng. 1 Page 2 of 5

1. Compulsory Question [30 marks total]

(a) Describe in your own words the functions of the Address, Data and Control buses of

a typical microprocessor based system. You may use diagrams where necessary.

[5 marks]

(b) With the aid of a system block diagram showing a microprocessor and memory

device, describe the memory read operation. You should further illustrate your

answer with a timing diagram.

[5 marks]

(c) How long does the following piece of assembly language take to execute (assuming

a 12MHz clock frequency)?:

MOV A,#55h

MUL AB

JMP NEXT

NEXT: MOV P2,A

MOV P3, B [5 marks]

(d) Write an assembly language program to add the number stored at memory location

27H to the number 33, store the result in Bank 2, Register 4 and output this same

value on port 2 (you may need to refer to the Microconverter quick reference guide

at the end of this exam paper).

[5 marks]

(e) Describe the following addressing modes: (a) immediate addressing and (b) direct

addressing, and explain the differences between the two modes. Use examples to

illustrate your answer. [5 marks]

(f) Describe the sequence of events that takes place when an interrupt is asserted in an

8051 microcontroller, with particular reference to ISR vectoring.

[5 marks]

2. (a) With reference to a modern computer system, explain briefly the following terms

(your answer must include a short description of main features of each technology):

i. DVI

ii. Firewire

iii. RAID [3 marks]

(b) How is cache used to speed up a modern computer system? (Your answer should

include a diagram of how cache is situated with respect to the microprocessor and

main memory.) How does it differ from conventional RAM? What are the

differences between level 1 and level 2 cache? [5 marks]

(c) Explain (with the aid of a diagram) how you would interface a keypad to a

microcontroller. You may assume that the keypad is a switch matrix and that the key

decoding must be done on the microprocessor. Describe the process of decoding for

each key on the keypad. How could such a keypad be set up to use interrupts?

[12 marks]

3. (a) What is STACK memory generally used for in a microprocessor system? How does

the STACK operate and how is it addressed? [5 marks]

(c) External interrupt IE0 has a vector address of 03h. Explain what you understand by

this statement and how this information influences the behaviour of an 8051

Microcontroller when external interrupt IE0 is triggered. [5 marks]

(d) Why are internal timers preferable to coded delay loops for timing events in an 8051

program? [5 marks]

(e) With the aid of a diagram, show how a switch might be connected to port pin p0.

(note: it is not necessary to show the internal details of the port pin). Explain your

answer. [5 marks]

^

A#

"9%B%

CBD

" E%" 2%F

"G+9

'H

A

/%I

'I

4'I

'I

#% !$' !::: I0B:JBK5CD

* 5''^ 1G '=

C1&G ^ '=

*D

C!/#"

" D

J

K

I!

J

#0:J5$5/!,$

#0:15A%

J

)/G

J

&J

I!

K

#:J5J5

J

K

#:5K5

#:055K

4$)C"D

0J

4$)C

D

01 0J 00 I!

0K

#:J505

#:15&55#A(

0K

#:5J505#A(

&J

&K

J

I!

J

&K

J

#:J5J

J

J&

J

JJ

$) (^) !+,*

++*( "

(^) "

+

&0

-)

A 9$ "

+

J

'

'8 "* "

+

0

'" "-

(^) " "

+ 00

&

$

$ /- * "

+

J

'

'8 "* "

+

0

1

$

$ /- * "

+

)$./

# 5 "

+

0

% 5$

%$ "

+

0

K

$5'4

$ "

+

0 1!+/*

(^) $ " -*

(^) " "

+

J0

+ /

;

:J) !)@!%^ JL ""  * "

; (^) *JL - *9

(^) +

)!)

6'.11$*

(^) ; (^) 1G * 5''+

(^) 9

(^)

&G * 5''

(^)

"

 ; (^) " (^) " J

1(6? + :0( #0 5/*"

'  (^) < ' ;

(^) +

(^) "

+

++* "

(^)

9 8 *" +

(^)

9 " " -

"

*51#A(+ B "B

/=/,

/>/

///

/?@

A

=,

>

>?>

>/>

>>>,

>=>A

>>@

,?,

,/

/?@A=,>/

/A//@?/>,=A@

C" $/#, 'A J+"(H#

(^) *D

 

/=/,/>

////

/?@

A=,

/

,>,,,=

>>>>,

>=>A>

>@,?,

,/

/?@A=,>/

/@?/>,=A@>>/

C" $/#, 'A J1+"#

*D

 

>

>? /A

,

(H# #

CB0,5 $ (^) D

" (^) "

C )$ *"

D

(4!

"

" @* * "

" "9+ :J,"$'(#

" *+ (^) (^) "

C 4

D (^ ?,/

99 "*

"9B+"

/ "1

" (^) ++* 9 %(J18 M4%(NG8

#A(

6'.11 + 9 1G8 6'.11 &G8

#/%

"" -*

A >/>/

? @

/=/A @

/,/>

///

@

A=

@

A=

?

/@/

>

/

>

/

,/,

,?>@

>=>,

>>>

 16 # 16 A=,>/?

 ?

)0.)(7 ) )))/*

/

!#)0* 

$+A$+=

$+,$+>

$+$+/

$+$+?

$/+$/+?

$+A$+=

$+,$+>

$+$+/

$+$+?

$?+A$?+=

$?+,$?+>

$?+$?+/

$?+$?+?

$/+/$/+ $/+>$/+, $/+=$/+A

**>/>

? $)1!( 1**

0=A

////

/ @ 0/1B0/00?

B0(B0(/ @ $- 

 $- ?

!0!0?

**,

/?> ,>A/**

>

# ! # (^) ! 1)10,

$+ACD$+=C-D

$+,C0.!#)0D$+>C0?.$-*^ .$-^ ?D

$+C!0.$+/C!0?D ).$- D*

$+C0D$+?CD

$/+C@.AD$/+?C.=D

$+ACAD$+=C=D

$+,C,.))D$+>C>D

$+CD$+/C/D

$+C.0/1BD$+?C?.0/D

$?+ACAD$?+=C=D

$?+,C,D$?+>C>D

$?+CD$?+/C/D

$?+CD$?+?C?D

$/+/C?.D$/+C.@D $/+>C/./?D$/+,C./D $/+=C>.//.$-$/+AC,./.$- ?DD

 "3 3

(^) &  (^) (^) 6$ 2

C" D

C" D C" D C" D C" D

C -D

C -D C -D

C -D

C -D C -D

C -D C -D C -D C -D

C -D C -D

C -D

^ )$*! &

'^ /*!

'^

^ $)-

^ 0/*!

^ -*!

^ $

^ 1

^ $/

K^ )*!

K^ $

^ 0*!

^ $?

K^ ?(

*6)( O

0( K

K^ 1*!

K^ 1$/

KK^ )^46

K^0^ *

^ )$

^ ?E

*6)E O

0E

^ ^ (

^ $/(

^ 0(?

^ $(

^ (

!( 0 O

0^ ^ E

^ $/E

^ 0(

0^ $E

^ E

!E & O

&^ ^ $

^ 0(/

^ 10

^ 0E?

&^ $$

^ *! &

*! J

^ 0E/

^ 10/

^ 0E

1^ 1(

'^ 10

^ )$0

^ $)^ *! '

^ 10>

^ $*!

^ )$?

'^ /

'

^ )?

^ $

^ $/

^ $B?

^ B

^ 1B?

K^

K^ 0/

^ 0?

K^ )$

'K^ /0B

'

K^ )

^ 6

K^ !0/

^ -1

K^ $0?

^ 0B

K^ 10?

KK^ 0

K^ 0/1B

K^ 1?

^ $E

'^ /)

'

^ )/

^ *#

^ 0/

^ -)

^ $B

^ !0?

^ 1B

K^ ^

K

^ 0

^ $*(

0

'^ /

'0

^ )

0^ )?

^ 1B1!/

0^ -

^ $0

0^ !0

^ 10

0

K^0^

K0

^ 1

0

^ )$

&

'^

'&

&^ )

^ 0(7

&

^ $)

&^ 0?

^ 1)

&

K^ 1!

K&

^ 0?

&

^ )$1

J

'^ *

'J

J^ 6?

^ (7

J^ $1

^ $0/

J^ 0

^ 10/

J

K^ )^ /

KJ

^ 06?

J

'^ -*(

1

''^ 1

'1

'^ ^

1^

'^ 1B6/

1^ $1/

'^ $

1^ -

'^ 1

1

K'^ )^

K1

'^ 0

1

^ )$

'^ *

'

^

^ 5

^ 06/

^ $1

^ $)

^

^ 1

K^ )^?

K

^ 06

K )$

O * "

+ B +

0&J1K'0:::

%J

K

J

%J

K

J

%J

K

J

1K

1J

J

J'

J

JK

J

J1

JJ

J&

J0

J

&K

&J

0K

0J

K

J

K

J

K

J

0 & J 1 K 0&J1K0&J1K000 00 0&0J 01 000K&&&&0&&&J&1&&::: *

C

D

C 6'.11 CG+9 D&G

% D

I0:=

C1(

*D

C+9D C+90D

^ I0:=

G

^ E$ 04 ^ 1E

^ $-^ ?( ^ $-^ ?E 0^ $-^ ( &^ $-^ E ^ )$E

^ 0^ 1! ^ E0E)1 0^ )1 &^ ! J^ E4 1^ !0#( ^ $*!

K^ 06 K'^ 0*!

K /0 K^ / JJ

$F1)10#(41)

P

* 5''C** 5 D

$

C 5 D

/!:

( * C==D

/!:

%"9* C=,

%'=, D

/!:J

%"9* C=,

%'=, D

/!:&

* C=,="

(^) * + "D

/!:

* C=,="

(^) * + "D

/!:

" (^) " +C= "

(^) " D

/!:

"C= = "D

/!:

"C= = "D

" (^) * 9

EG(

(^) 9

!E

* "I" (^) "

6)(6)E!(

* "^ / (^) "

8* 9

*

(^) # ++*( "

(^) " * 9

#(/!: (^) #( (^) C=" (^) *5= *D

#(/!:J (^) #(" (^) +

#(/!:& (^) ++ " *

#(/!: (^) E&:0,0:,:K0,:10,F

#(/!: (^) C (^) ""? (^) D

#(/!: (^) C -D

#(/!: (^) #(+ "

(^) " *C= "5= D

0E

9

$G

EG

(^) (

(^) + "

Q (^) *

8 (^) 

9" + (^) + 9

% 9 "7 *

(^) " *

% - 9 "7=E0F

/, - * *

9" + (^) + 9

+

?EG?(

(^) 9

9 (^) A (^)

0E/G0(/

$ 9

$/EG$/(

(^) $ %* 5+

(^)

$ - * *

'4 (^) 8 "

%)G - * (^) 7"*C=$

(^) (^) %8 *7D

$)G (^) " *

(^) 7"*C=$

(^) (^) $8 *7D

'4'! (^) 8 ""C=9"

(^) $'4= +5 * "$'4D

$% " " (^) *C= +=

(^) "D

!$ (^) 5 (^) " * C= =

(^) " D

# + 5 *  C=  = +

(^) D

$ "

(^) * 9

#

# 5 C *" "

(^) +D

#

C"

(^) +D

#$

$5'4C$ - * "

(^) +D

#

% 5$ C *+

(^) " (^) +D

#$

$C$ - * "

(^) +D

#4

'C8 "*"

(^) +D

#$

$C$ - * "

(^) +D

#4

'C8 "*"

(^) +D

" +# (^) 9

% 8 "*

(^) (^)

A% 8 "*

(^) (^)

$ 5 (^) " 8 "*"+

!$ 8 "*" (^) +

$8 + (^) " "

%8 + (^) -"

(^) 0 9

' "" (^) + C=*"

(^) + *D

' (^) "* C"

(^) +D

'$ "$5'4C$ -  "

(^) +D

' "% 5$ C +

(^) " (^) +D

'$ "$C$ -  "

(^) +D

'4 " 'C8 ""

(^) +D

'$ "$C$ -  "

(^) +D

'4 " 'C8 ""

(^) +D

" +'"* 9

(^) 9

(^) C* BJ@1B0D

(^) *+ (^) 9

( (^) %$

(^) " (^) * (^) P

( (^) B 9

(^) B /5

B %$

B- *

B K%$

B/ 51&C8D

B K%$

B- *

( (^) " @0"* *+

(^) (^) " "

%'! (^) -"*

(^) " (^) *

$ " @0K "

% " @0K -

$ " "

+*

% -"

+*

(^) * (^) " " "

(^) * 9

$' (^) 5 (^) " +

(^) 5 * 99

$ 5 (^) " 8 "*"+

(^) 9 C"* 9@9*"+ D

0E?G0(?

$ 9

0EG0(

$ 9

$(/:05: (^) 9 (^) " (^) *C=9" (^) !$8D

$(/:5:

" 5 * C= D

$(/:5:J (^) * "

$(/:5:& (^) E0$1$5$5 * 8$F

C ++ "=$ "*=$ D 0

$ ( 9

$ $ - * *9C * "-

(^) %D

$% $ (^) " " (^) *C= =

(^) "D

$ $ - * *9C * "-

(^) %D

$% $ (^) " " (^) *C= =

(^) "D

' 8 " !$9C * "-

(^) %D

$ '+C=- 9=9 9D

' 8 " !$9C * "-

(^) %D

$ '+C=- 9=9 9D

$ " (^) * 9

#/!: (^) *

(^) "

#/!:& (^) )' *C="

(^) *= (^) )'9D

#/!: (^) 9" + (^) + 

#/!: (^) + B "

(^) " C (^) -  D

#/!: (^) B (^) " (^) C (^) - ""

(^) +D

(^) # "

(^) * 9

# " #9

$EG$(C$0D

(^) # "

7# "

(^) 9

(^) C* B@BD

/!: (^) C= = "D

/!: (^) 8 ",  C= "B +, D

/!:J

"- "=15 *

/!:& (^) *7=116?5E1&F

/!: (^) > " *

/!: (^) >=E0&F5 *

/!: (^) $ (^) "- "*

/!: (^) 8 "/!,$"

" (^) * 9

" (^) +*

( ( "*

/!,

"" (^) "- (^) ""*

/!, "9* (^) "- (^) "

"+ ""  P

B=B

=+

(^) "

K===I!

$ ('/!: (^) C (^) ""D

$ ('/!:J (^) !$,) *

$ ('/!:& (^) E

(^) " "

F

$ ('/!: (^) "9" -

(^) " C=  @ D

$ ('/!: (^) " -*"

(^) +M$ N

$ ('/!: (^) " -"C= *@ * D

$ ('/!: (^) * (^) 7"C= D

(^) $ " -*

(^) " " (^) *%9

E0E)1

(^) $ '*+

(^) "%9

$ '*+

(^) " %9

$ '*+ (" %9

E*4

$ '*+

%9

$ " -*%9

(^) 0 "

(^) "%9

I0:

8" 7B+ " "C= D

I0:

#A(+" * C=#:15#:=#0:&5#0:0D

I0:J

(^) + +

(^) C= "*D

I0:&

* 5''@#A( *

(^) 7 -

I0:

,= /%' 5E01&J1J&88F

I0:

C (^) , (^) =0G6?RJSD

I0:

C (^) ""? (^) D

I0:

" "4%(  C=8 "*4%(D

1EG1(

(^) * 5''

(^) 9

10G10/G10G10>

* 5'' 9 1 (^) '%'))J (^) '%'+9& (^) ,'% Q+9 #%/I%(+9 %'+9

* 5''

^ " 9 C** (^) '!$'%)/ (^) '4 $)/ (^) #%/I%( -D

# # " (^) +C " # " D

A/) (^) * " (^) 

#' # "C= "=# "*D

# ( * C= *-D

#/)

(^) 7+   C=)G  D

#6

(^) 7+  C="99* D

#% # *

#% = (^) 5E&1FC *-P#%=D

# " (^) * 9

# 9

#%' 9

(^) * "

#%' B=EJ:10:1:JJJJF

#%' = C D

#%' T= -

A % 9" (^) + + "

A 9 (^) *9C" 9

(^) D

A' 9"*

(^) " (^) C= D

AA% (^) 9 "C " D

A 9$

(^) " (^) * 9

' #: (^) + (^) $ "

(^) +C" -*D

' #:J (^) + (^) #( "

(^) +C+ (^) ++* " (^) D

' #:& (^) + (^) # "

(^) +C *" D

' #: (^) C (^) ""? (^) D

' #: (^) "*$ "

(^) +C" -*D

' #: (^) "*#( C+

(^) ++* " (^) " (^) +D

' #: (^) "* # "

(^) +C *" D

(^) " (^) +'"*5#

(^) 9

E$

+ %9

(^) C048= 0D

)$E

7# " 69

(^) #A( "

(^) * 9

#A(/!: (^) #A( E= = "95- : :

#A(/!:J (^) ="50="51&= *51!%<

#A(/!:& (^) J= 51= 51%<=C -DF

#A(/!: (^) #A( * (^) 7-

#A(/!: (^) #A( (^) " = * (^) 75E&11&F

#A(/!: (^) #A( * (^) 7 E= ,5J= ,

#A(/!: (^) 0=$8:": &=

/%' F

?EG$-

(^) #A( 9

EG$-

(^) #A( 9

# " "

(^) * 9

#/!: (^) + " B 99"C= *D

#/!:J

+ "

(^) " (^) *

#/!:& (^) E=J=+

(^) B" 0=+ (^) B &=)9*F

#/!: (^) "+ "

(^) " (^) *

#/!: (^) E=J=+

(^) B" 0=+ (^) B &=)9*F

#/!: (^) C" +" * !#/! 99*"9D

#/!: (^) + " * E="= F

$ 0 "

(^) * 9

$0/!:

$ 0 "C= D

$0/!:

" -

(^) C ,D

$0/!:

,=* 9E

/%' 5C0U DF5* 9

$0/!:

C " "D

$ 0 "*- 9

$0=CU

/%' D5C U

(^) DB1& ,

(/ $

(^) +

(' $

(^) + "C= D

(/ )G

(^) +

( $"+

( * C= *- D

% *+ (^)

$ (^) " (^) " "

(^) C=%4=$4D

*" "

(^) +

(^) " (^) * 9

(^)

(^) 9

/!0: (^) (^) " (^) *9C=" -D

/!0: (^) 9"  " C=9" "D

/!0:J (^) " - 9 * " P

/!0:& (^) EJ010F

/!0:

 * 7-  C= *7= *75D

/!0:

  C=- = D

/!0:

+  C= =9"D

/!0:

* " *

" (^) * 9

Quick Reference - Microprocessor Systems Engineering I- Past Exam Paper, Exams of Materials science

Related documents

Partial preview of the text

Download Quick Reference - Microprocessor Systems Engineering I- Past Exam Paper and more Exams Materials science in PDF only on Docsity!

EE

Exa

Exa

Mo

Mo

Pap

Rep

Exte

Inte

Inst

Dur

No.

Disc

Cou

Req

MC

Han

Stat

Gra

Log

Oth

206.i Microp

am Code(s)

am(s)

dule Code(

dule(s)

per No.

peat Paper

ernal Exam

ernal Exami

tructions:

ration

of Pages

cipline

urse Co-ord

quirements

CQ

ndout

tistical Tabl

aph Paper

g Graph Pap

her Material

processor S

S

S

S

S

(s) E

M

miner(s)

iner(s)

dinator(s)

s :

les

per

Systems Eng

Autumn

2 BP121, 2B

Second Elec

Second Elec

Second Spo

Second Eng

EE206.i

Microproce

Prof. G. W

Prof. G. Ó

Dr. M. Gl

Answer Qu

Question 1

Questions

2hrs

Electri

g. 1

Examinati

BN121, 2BE

ctronic and