Briefing Session on 2013 HKDSE ICT Exam

1

Briefing Session on

2013 HKDSE ICT Exam

22/23 ov 2013

Breakdown of elective

No. of candidates No. of schools

1

2A

2B

2C

2D

2

Options offered

No. of options No. of schools

1

2

3

4

3

Popularity

Combination No. of schools

C

D

A

CD

4

Interesting Figures (1)

Paper Max Mark

1 92

2A 54

2B 49

2C 48

2D 55

5

Interesting Figures (2)

Selection of Prog Lang (2D)

Total %

Pascal 796 69.1

C 286 24.8

Visual Basic 45 3.9

Java 25 2.2

1,152 100

6

7

Performance Compulsory Part

Average no. of MC items correct = 2

High correlation with Paper 2s and SBA

8

Performance Elective Part

Equating performance of candidates (Elective Part) can be reflected on the

same scale (Equipercentile method )

Performance (Paper 1) of students in

2D > 2A > 2B > 2C

Refer to Grading Procedures & standards-referenced

Reporting in the HKDSE Exam (HKEAA)

9

Grading Procedures

Sample script selection

Standardisation

Post-marking exercise

Panel of judges grading meeting

Internal meeting

Public Exam Board meeting

Refer to Grading Procedures & standards-referenced

Reporting in the HKDSE Exam (HKEAA)

ICT

Level %

5**

5*+

5+

4+ 2

3+

2+

1+

10

11

Levels attained

HKDSE Level 4 comparable to

HKAL Grade D

L5** Top 10% of L5

L5*+ Top 40% of L5 (L5* = next 30%)

12

SBA

13

SBA Reminders

Students have to

complete their reports on their own

acknowledge sources properly in their work

to avoid plagiarism

New measures: Prevention & handling

of Malpractice

14

ICT Exemplars

Exemplars with annotated notes

P1B 1 exemplar @ Level @ language

P2 selected levels

Uploaded to www.hkeaa.edu.hk

http://www.hkeaa.edu.hk/

Assessing Student Learning

for the ICT Curriculum

Briefing Session on 2013

HKDSE ICT Examination

[ 1B & 2B ]

Paper 1B Qu 1 ~ (a) (i)

John connects the printer to the network at P instead of Q. What is the advantage

and disadvantage of this? Adv : easy to control

Disadv : can be used only when the

desktop computer is on

Student Performance : OK

Paper 1B Qu 1 ~ (a) (ii) The printer is equipped with RAM and

ROM. When John prints a document, what will the RAM and ROM store?

Student Performance : RAM: print data

ROM: printers firmware

OK, some not know printer has RAM and ROM, and their functions

Reflection for T&L: RAM & ROM are generic main storage, not

only for computer

Paper 1B Qu 1 ~ (b) (i) Suggest two possible ways to link up the

desktop computer and the smartphone.

Student Performance : Good

WiFi network

Bluetooth

USB cable

Paper 1B Qu 1 ~ (b) (ii) X and Z are two different cables. What is

the major difference in functional characteristic between them?

Student Performance : data transfer rate

Max. length cable segment

Not good, some talk about analog and digital signal

Reflection for T&L: Teach student what is the meaning of

functional characteristics

Paper 1B Qu 1 ~ (c)

The rear part of the router is shown in the diagram below. Mark X and Y on the diagram to indicate where the cables X and Y should be

connected.

X LAN

Y WAN

Paper 1B Qu 1 ~ (d)

Someone suggests that John build a Domain Name System (DNS) to improve his network

services. John disagrees with this suggestion.

(i) What network service does a DNS mainly provide?

(ii) Do you agree with Johns view? Explain briefly.

(i) DNS resolves domain names into IP

(ii) He does not need DNS because it is just a LAN

Student Performance :Good

Paper 1B Qu 2 ~ (a)

Janice is planning the annual Charity Run for her school. She uses graphics software to create

a map with the route of the Charity Run and

posts it on the schools web site. Janice decides to store the map as MAP.JPG instead

of MAP.BMP. Give one benefit of her decision.

smaller file size/ supported by many browsers

Student Performance :Good

Paper 1B Qu 2 ~ (b)

Janice finds that the email client program classifies Alans email as spam. What does she

Suggest two protocols for receiving email that Janice may use

POP3, IMAP

need to do to prevent this happening again? Add his email address in non-spam list

Janice tries to reply to all the email accounts involved

Student Performance :Good Alan and Betty

Paper 1B Qu 2 ~ (c)

The notebook computer is equipped with a solid-state drive (SSD) instead of a general hard disk.

Give two benefits to Janice of using a SSD.

higher data transfer rate. consumes less electricity. smaller in size. better shock resistance. Lighter more durable.


Paper 1B Qu 2 ~ (c) Janice uploads the videos and pictures to the

schools web site and the web site includes a statement All rights reserved. If the statement were removed, would the school own the

copyright of the web site? Explain briefly.

Yes, copyright ownership does not

require any registration or declaration.

Paper 1B Qu 2 ~ (d) (i) To promote the Charity Run, Janice writes an

article in the school newsletter and inserts the following code for linking to the schools web site. Give one advantage of using this code over a bar code.

Student Performance :

store more data. a higher error correction capability. can be scanned in different orientation. be

made up of more types of data

OK, but some show no experience in it

Reflection for T&L: More actual demo to student

Paper 1B Qu 2 ~ (d) (ii) What is the benefit of using this code in the

school newsletter?

faster to input the URL reduce typing errors

Student Performance : OK, but some of the answer are too simple (e.g.

convenience)

Reflection for T&L: More concrete answer, higher level questioning at

lessons

Paper 1B Qu 2 ~ (d) (iii) Describe another kind of use of this code.

phone number / product information.


Paper 1B Qu 3

Amy, Billy and Charles work in different offices in a company. Read their conversation about using computers and answer the questions below.

Amy: Charles, your office does not have a good ergonomic environment.

Billy: Charles, you have installed a Bit Torrent (BT) program on your computer. You should delete it.

Charles: No, I will still keep the BT program and use it.

Amy: Charles, we installed the same anti-virus software at the same time but only your computer is infected.

Paper 1B Qu 3 ~ (a) Give two possible features of the setup of

Charles office that could easily lead to eye strain when using the computer.

improper viewing angle of the monitor /

improper height of the monitor /

distance from the monitor to his eyes too close /

insufficient light /

close to the window without curtain

Student Performance : Good, but some state features not related to

set-up, or not related to eye strain

Reflection for T&L: Care about EVERY word in the question

Paper 1B Qu 3 ~ (b) Billy and Charles have different views on the use

of the BT program.

(i) Give a reason to support Billys recommendation.

(ii) Give a reason to support Charles decision.

(i) Charles would download some software that the sources come

from unidentified individual users; the software might be privacy

copies.

(ii) Charles can share working files with other colleagues efficiently.

Student Performance :OK, but some student think BT is fast / illegal / virus

Reflection for T&L: Clear general misconception of their usual experience

Paper 1B Qu 3 ~ (c) Why is only Charles computer infected?

Give two possible reasons.


infected with new computer virus deactivates his anti-virus software. does not regularly update the definition

database of the anti-virus software.

Good, but some state their Anti-virus software are different


Paper 1B Qu 3

Charles: The operating system of my computer uses Unicode instead of Big-5 code and GB code.

Billy: Unicode only includes around 20,000 Chinese characters.

Amy: Not any more. As of September 2012, Unicode includes more than 110,000 characters.

Paper 1B Qu 3 ~ (d) (ii) Referring to Amys comment, do the 110,000

characters include traditional and simplified

Chinese characters only? Explain briefly.

Other than the Chinese characters, there are characters

of other languages

Student Performance : Good, but some mentioned the following only

Number Character English character

Reflection for T&L: State more related examples

Paper 1B Qu 3 ~ (d) (i) To represent a set of 20,000 characters

using binary code, what is the minimum

number of bits required? Show your

calculation. 214 < 20,000 < 215

15 bits are needed.


Paper 1B Qu 3 ~ (d) (ii) Referring to Amys comment, do the 110,000

characters include traditional and simplified

Chinese characters only? Explain briefly.

Other than the Chinese characters, there are characters

of other languages

Student Performance : Good, but some mentioned the following only

Number Character English character

Reflection for T&L: State more related examples

Paper 1B Qu 3

Amy, Billy and Charles go to a public library and want to use workstations.

Amy: There is an empty seat but the workstation has not been logged out.

Charles: The email account has not been logged out. There is a coupon attached to the email. Let me print it

so we can use it.

Billy: The security of the workstations is very low. Secure Sockets Layer (SSL) should be used.

Paper 1B Qu 3 ~ (e) (i) Describe two illegal offences that Charles would

do if he accessed the email and printed the

coupon. He accesses the email account without authorization. He steals the coupon.

Student Performance : Good, especially in THEFT offences. But some

mentioned privacy instead of illegal access

Reflection for T&L: A good example to show illegal access vs privacy

Paper 1B Qu 3 ~ (e) (ii) Can SSL prevent Charles from accessing

the email account mentioned above? Explain briefly.


No, SSL is used to secure the data

transmission. (encryption)

Good, except some only mentioned more secure, which is not acceptable

Reflection for T&L: Dont simply repeat wordings in the question

Paper 1B Qu 4 Sarah is a librarian in a secondary school.

She uses a table in a database, LOAN, to

store the book circulation records.

Paper 1B Qu 4 ~ (a) Suggest a primary key for LOAN.

Suggest a validation check on each of the following fields.

Student Performance : Good, except some not using question example for

answer reference

Reflection for T&L: Give explanation with reference to question scenario

Paper 1B Qu 4 ~ (b) Sarah executes a SQL command on

LOAN with four records, as shown below. SELECT STUID, COUNT(*) FROM LOAN GROUP BY

STUID


Paper 1B Qu 4 ~ (c) Sarah wants to send a reminder email to the students

whose fines total more than $10. She uses column E to store Y if the email is needed, and N otherwise. She

enters a formula into E2 and then copies it to the other cells in column E. Write the formula in E2.Suggest a validation check on each of the following fields.

Sarah enters the following formula into H3 and then copies it into H4:H5 so as to calculate the sum of all fines in each form. =SUMIF(C2:C160,$G$3, $D$2:$D$160)

Student Performance : Poor, especially in Relative & Absolute Addressing

Reflection for T&L: More effort on Excel Addressing

Paper 1B Qu 4 ~ (d) Sarah copies the worksheet into a

document in a word processor by creating

a dynamic link. For each of the following

actions, is there any change in the

worksheet? If yes, describe the change


Paper 1B Qu 4 ~ (e) Sarah creates a presentation file with

hyperlinks and multimedia elements and

posts it on the schools web site. A student downloads and opens the file. He finds

some technical problems regarding the

hyperlinks and multimedia elements.

Describe two possible technical problems.


Paper 1B Qu 5 ~ (a)

Student Performance : Good, student understand need of

initialization, and some basic operation

Paper 1B Qu 5 ~ (a)

Student Performance : Not good, some student not good in explaining

change

Reflection for T&L: More practice in describing change

Paper 1B Qu 5 ~ (c) In this sales promotion, ALG3 is used to

calculate the actual payment, PAYMENT, for Mary. ALG3 includes ALG1 and ALG2. Complete ALG3.

Student Performance : OK, but some not good in subprogram / modularizing

the program

Reflection for T&L: More practice in subprogram / modularizing the

program

Paper 1B Qu 5 ~ (d) The department store has another sales

promotion. The 20 members with the highest total spending each month can enjoy 20% off all year round. A computer application system is used to find these 20 members. Should the system be a single-user system or a

multi-user system? Explain briefly.

Should the system be a batch processing system or a real-time system? Explain briefly.


Briefing Session on

2013 HKDSE ICT Exam Paper 2A

Question 1

Question 1

Candidate Performance :

(a) Very Good. (b) Satisfactory. (c) Satisfactory.

Most candidates are able to manage simple SQL statements involving filtering,

ordering and grouping.

* Accept grouping field(s) is/are not the same as the field(s) in the select clause.

* Accept TRUE, TRUE, TRUE and .T. to represent boolean data type.

Question 1


(d) Fair. (e) (i) Fair. (ii) Poor.

(d) Some candidates cannot handle this more complicated SQL statement. Some of

them cannot distinguish the usage of where clause and having clause and put aggregate function in the where clause.

* Not Accept YEAR() = 2012 since the return of the function YEAR() is an integer.

(e)(i) Some candidates directly explain the working flow of this SQL statement, but

cannot show the background purpose of it.

(e)(ii) Many candidates dont know how to use outer join.

*Accept left outer join and left join *Not accept = NULL

Question 1


(e) (iii) Poor.

Only a few candidates can answer MINUS / EXCEPT.

Some candidates understand this question is asking for combining two SQL

statements, but they only know the word UNION.

Question 2


(a) Fair.

Some candidates dont

know how to determine

which is foreign key.

Question 2


(b) Poor.

Many candidates dont know the usage of data dictionary.

Question 2


(c) Satisfactory

Many candidates dont know why SQL View can be used to protect the data privacy.

Question 2


(d) Satisfactory

(i) Most candidates can explain the problem, but they dont know the term referential integrity and the concept related to foreign key.

Question 3

Candidate Performance : Fair

This is a very traditional question, but some candidates still dont understand the difference of usage between database and spreadsheet

Question 3

Candidate Performance : (b) Excellent

Some candidate are weak at data representation, e.g. use 888 for an integer.

* Accept 2013-03-20,2013-03-20,20/03/2013,#20/03/2013#,{20/03/2013} and * Not Accept 20/03/2013, 20-03-2013

Question 3


(c) Satisfactory

Many candidates know this suggestion can reduce the required storage size, but not

many of them can answer the potential disadvantage with the concept of data

validation.

Question 3


(d) Fair

Most candidates dont know what should be done before data migration.

Question 4


(a) Good.

Some candidates cannot

identify the job title. Some

candidates wrongly think

programmer is responsible for

designing the conceptual

database schema.

Question 4


(b) Good

* Get 1 mark when one of the entities is correct

* Get 1 mark when one of the relationship is correct

* Get 1 mark when one of the cardinality is correct

Question 4


(c) Satisfactory

Many candidates can answer both advantage and disadvantage of the combination.

Question 4

Question 4


(d) Satisfactory

(i) Most candidates know that the system should not disclose the name of buyers.

(ii) Some candidates only concentrate on the ordering and dont know the provide proper information means to protect data privacy. MID should not be selected.

Question 4


(e) Satisfactory

The majority of the candidates can answer correct subquery.

(f) Fair

Many candidates can answer this question.

Paper 2B Qu 1

Paper 2B Qu 1 (a) What does the value 80 after the colon in

the URL mean?

Network mask: Default gateway:

Student Performance : Good, except some wrote wrongly

Reflection for T&L: More practice in keywords

Paper 2B Qu 1 (b) function of the gateway benefit to Vicky of enabling VPN DHCP is used in the network. How does this

help the network connection

Student Performance : Poor, especially in VPN and DHCP. Some wrote their

definition but not benefit

Reflection for T&L: Clear concept between difference of definition vs

advantage in using

Paper 2B Qu 1 (c) Suggest two changes in the settings of the

router which would improve the security

Vicky finds that the tablet computer is out of order. She buys a new one which is of the same

model and uses the same settings as the old

one. However she cannot connect it to the WiFi

network. Why? What change in the settings of

the router should she make?

Student Performance : Good, knowing MAC is unique

Paper 2B Qu 1 (d) Vicky enables automatic channel selection

instead of the fixed channels for the router. Why?

Student Performance : Poor, most simply mentioned the benefit is

automatics

Reflection for T&L: Dont simply repeat wordings in the question

Paper 2B Qu 1 (e) Vicky has a notebook computer. The

network supports wired and wireless

connections. Vicky decides to use the

wired connection for the notebook

computer. Apart from bandwidth, suggest

and describe two reasons to support her

decision.


Paper 2B Qu 2

Paper 2B Qu 2 (a) Give an example of the analog data.

Give an example of the digital data.

Where does the conversion from analog data to digital data take place?

Where does the conversion from digital data to analog data take place?


Paper 2B Qu 2 (b) Briefly describe the data flow in these cameras

to illustrate the simplex mode.

The security system uses synchronous transmission. Give one advantage and one disadvantage of using synchronous transmission.

Student Performance : Poor, cannot well describe

Reflection for T&L: Concept is simple, need more practice in describe

Paper 2B Qu 2 (c) Data captured by the cameras is stored on

the server. Optical fibre instead of CAT5 cable is used for the new cameras but the network throughput does not improve. Give two upgrade suggestions for improving the network throughput

Briefly describe the data flow in the new IP cameras, to illustrate the duplex mode.


Paper 2B Qu 2 (d) In each of the following cases, which protocol,

UDP or TCP, should be used? Explain briefly.

The visual images are sent to a server for storage.

Security officers can instantly view the visual images of the lobby.

Student Performance : Poor, cannot well describe

Reflection for T&L: Need more practice in describe

Paper 2B Qu 3

Paper 2B Qu 3 (a) Describe two network tests that Mr Chan

has to do during the testing stage.

The museum plans to allow visitors to use their own mobile devices. Give two considerations that the museum should bear in mind before implementing this plan.

Student Performance : Good, students show good ability in design

test plan if objectives are clear

For museum consideration, students answers are too technical

Paper 2B Qu 3 (b)

One day, four APs are out of order. Problem encounter Relocation ?


Paper 2B Qu 3 (c) An IT company will donate as many as APs Mr

Chan wants. Someone suggests that Mr Chan

should mount more APs, for example, one AP

every 5 m2. Give two disadvantages of this

suggestion

Student Performance : Good, except some wrote need budget to buy


Paper 2B Qu 3 (d)

Mr Chan needs to install Y instead of network cables for connecting X1 and X2 to the server. Give one reason to explain why network cables should not be used.

What major task will X1 perform when interacting with the other five APs in the hall?


Paper 2B Qu 4

Paper 2B Qu 4 (a) Patients medical data is sent from the

server to doctors messaging devices through the hospitals WiFi network

instead of the public mobile network. Give

two reasons to support the use of the WiFi

network.


Paper 2B Qu 4 (b) Patients medical data collected from the

medical sensors is sent to doctors

messaging devices via the server. What

are the major functions of the server

regarding network management? Give

two examples.


Paper 2B Qu 4 (c) Packet switching is used for the data

transmission between the server and doctors messaging devices. Circuit switching should not be used in this case. Why

not?

Describe the packet switching mechanism for the data transmission.

Student Performance : Poor, cannot well describe, and also not clear in

packet vs circuit switching

Reflection for T&L: Need more practice in describe, and more teaching

in packet vs circuit switching

Paper 2B Qu 4 (d) The network design uses Cloud storage,

that is, online storage managed by third

parties through the Internet.

Give two benefits of using Cloud storage

Give two potential problems of using Cloud storage.


Paper 2B Qu 4 (e) The bedside device is a mobile device which

allows a patient to move around the hospital with

the device. It forms a personal area network

(PAN) with medical sensors for communication,

as shown below.

Student Performance : Poor, student not have good knowledge in PAN

Reflection for T&L: Need more teaching in PAN

2013 ICT Paper 2C

/ Codec/

Codec

60 1024 1024 8 / 200 60 8 / 200

= 2516582.4 bit/s 2.4 Mbps (2.5Mbps)

MP4 / MKV / AVI (H264, AVCHD) / WMV / FLV / MOV (, )

codec, FFmpeg, DivX, Xvid, x264, mpeg

( )

/

HTML /

/ (frame) / CSS / / (layer) (, )

/ /

/ / / / / / / / (, )

5184 3456 24

= 51 / 51.3 / 51.26 MB

/ / / /

/ (, , )

HKDSE ICT Paper 2C Q.3 - 4

/ / ( )

( )

( / )

/ JavaScript(1) (+1) (1) / (+1)

1 (1)1 (+1) ( )

2 (1)2(+1) ( )

(1) (+1)

/ // /

/ / )

44,100 (44.1 1024 )

16/16

phase Amplitude / loudness / volume

(2)

(2)

(1)

(1) (+1)

2013 HKDSE ICT-D workshop

2013-11-22 2013-11-23

Documents

Briefing Session on 2013 HKDSE ICT Exam