Sample assessment task - School Curriculum and Standards ...wace1516.scsa.wa.edu.au/__data/assets/word_doc/... · Web viewComputer Science | ATAR Year 11. 2014 ... Project. Conditions

SAMPLE ASSESSMENT TASKS

COMPUTER SCIENCEATAR YEAR 11

Copyright

© School Curriculum and Standards Authority, 2014

This document – apart from any third party copyright material contained in it – may be freely copied, or communicated on an intranet, for non-commercial purposes in educational institutions, provided that the School Curriculum and Standards Authority is acknowledged as the copyright owner, and that the Authority’s moral rights are not infringed.

Copying or communication for any other purpose can be done only within the terms of the Copyright Act 1968 or with prior written permission of the School Curriculum and Standards Authority. Copying or communication of any third party copyright material can be done only within the terms of the Copyright Act 1968 or with permission of the copyright owners.

Any content in this document that has been derived from the Australian Curriculum may be used under the terms of the Creative Commons Attribution-NonCommercial 3.0 Australia licence

Disclaimer

Any resources such as texts, websites and so on that may be referred to in this document are provided as examples of resources that teachers can use to support their learning programs. Their inclusion does not imply that they are mandatory or that they are the only resources relevant to the course.

2014/30797v5

1

Sample assessment taskComputer Science – ATAR Year 11Task 1 – Unit 1

Assessment type: Project

ConditionsTime for the task: Two weeks

Task weighting10% of the school mark for this pair of units__________________________________________________________________________________

Scenario

The Ballajura Independent Supermarket (the BIS) is a family owned and run business. The business owners are currently considering updating their standalone computers. They have hired a business consultant to give them some direction about the updating of the technology for the business.

Following a preliminary study, the consultant has produced the following analysis of the business.

The supermarket is split into a number of departments, such as fruit and veg, butcher, bakery, frozen foods, toiletries etc. Each department has a manager who is responsible for all reordering of stock. Each department sells an assortment of goods but all goods in the department are of the same type. For example, the deli sells olives, cheese, salads and so on, whereas the butcher sells cuts of pork, beef and lamb. Each item for sale is sourced from only one supplier, and the supplier can supply many different items for the supermarket to sell.

At the end of each day, the manager receives from each department a list of stock which is running low. The manager analyses the low stock list and sorts the items into supplier lists. The lists are sent through to the administration department where the order forms are filled out and emailed, before 9:00am, through to the specific supplier, who in turn, emails back a confirmation of the order. When the ordered items are delivered a few hours later, someone from the administration department checks the invoice/delivery slip against the order and then updates the stock lists.

Employees are paid every Thursday, based on the hours that they worked during the previous Monday to Sunday. The wages are calculated manually. All employees work a set number of hours, plus they also have the opportunity to work overtime on the weekends and on public holidays.

The business is planning to open a small ‘cash only’ café selling ‘Burgers, made to order’ and cold drinks.

Sample assessment tasks | Computer Science | ATAR Year 11

2

The business consultant then used a system analyst to break down the ordering system into the following steps.

At the end of each day, the manager receives from each department a list of stock which is running low. The manager records the items of stock that need to be replenished into supplier lists.

The lists are sent through to the administration department where the order forms are filled out and faxed, before 9am the following day, through to the specific supplier, who in turn, provides a confirmation of the order.

When the ordered items are delivered, someone from the administration department checks the invoice/delivery slip against the order and then updates the stock lists.

Systems analysis

1. Describe the system development methodology that the systems analyst would use to investigate and implement an Information Technology solution for the Ballajura Independent Supermarket.

(2 marks)

2. a) List and describe three (3) methods that the system analyst would use to collect information about how the business is operating.

(9 marks)

b) Select one (1) of the methods listed for 2 (a) and explain why that method would be suitable to collect information of the operation of the business.

(2 marks)

3. Describe one (1) feature of a physical DFD and one (1) feature of a logical DFD.(4 marks)

4. Describe the reason why a Context Diagram would not include a data store.(2 marks)

5. Explain the concept of a ‘balanced L0 DFD’. (2 marks)

6. a) Explain why a data flow is labelled using a noun. (2 marks)

b) Explain why a process is described using a verb. (2 marks)


3

7. Below is an incomplete Context Diagram for the Ballajura Independent Supermarket.

a) Complete the diagram by providing the missing labels for the entity, the system, and the external flows.

(4 marks)

b) Based on the Context Diagram for 7 (b) and the information in the scenario, create a Level 0 DFD for the ordering process used at the Ballajura Independent Supermarket.

(23 marks)

Total = 52 marks


4

Marking key for sample assessment task 1 – Unit 11. Describe the system development methodology that the systems analyst would use to

investigate and implement an Information Technology solution for the Ballajura Independent Supermarket.

Description MarksProvides a description of the system development methodology 2Provides a limited description of the system development methodology 1Answer could include, but is not limited to:Note: The answers will provide ‘Prototyping’ or ‘Systems development life cycle approach’, depending upon the rationale provided within the description.

2. a) List and describe three (3) methods that the system analyst would use to collect information about how the business is operating.

Description Marks

Correctly lists three (3) data collection methodologies 1–3(1 mark each)

Subtotal 3

Provides a description of the data collection methodology 2–3(per method)

Provides a limited description of each data collection methodology 1(per method)

Subtotal 6Total 9

Data collection methods could include: Questionnaires Interviews Observations Document analysisDescription of data collection methodology could include: Questionnaires: Documents with questions completed and returned by a person who works in the

business or a person who engages with the business Interviews: questions responded to by a by a person who works in the business or a person who

engages with the business Observations: A record of the business made through observation Document analysis: A review of documents used within the system


5

b) Select one (1) of the methods listed for 2 (a) and explain why that method would be suitable to collect information of the operation of the business.

Description MarksProvides an explanation of the use of the selected data methodology 2Provides a limited explanation of the use of the selected data methodology 1Answer could include, but is not limited to: Questionnaires: Inexpensive, suited to less complex questions Interviews: Expensive, better suited to complex questions Observations: Expensive, requires high level of permission, suited to multiple items of investigations Document analysis: Expensive, better suited to establishing a detailed analysis of organisation

documentation and workflow

3. Describe one (1) feature of a physical DFD and one (1) feature of a logical DFD.

Description Marks Provides a suitable description of one (1) feature of a physical DFD Provides a limited description of one (1) feature of a physical DFD

21

Subtotal 2 Provides a suitable description of one (1) feature of a logical DFD Provides a limited description of one (1) feature of a logical DFD

21

Subtotal 2Total 4

Features of a physical DFD could include, but are not limited to: provides an overview of all the people within a system, what they do and how data flows between

all people within the system indicates how the work is done in the system indicates how the information in the system is representedFeatures of a logical DFD could include, but are not limited to: develops from a physical DFD represents the logical flow of data in the system indicates the processing of data provides a better understanding of how the system operates, is easier to maintain and develop

4. Describe the reason why a Context Diagram would not include a data store?

Description MarksProvides a suitable description for the reason why a Context Diagram would not include a data store

2

Provides a limited description for the reason why a Context Diagram would not include a data store

1

Answer could include, but is not limited to:A Context Diagram is the highest level in representing a data flow diagram. A Context Diagram contains one process and is designed to show data flows between system and external entities. At this level, entities and data stores are external to the system.


6

5. Explain the concept of a ‘balanced L0 DFD’.

Description MarksProvides a suitable explanation of the concept of a balanced L0 DFD 2Provides a limited explanation of the concept of a balanced L0 DFD 1Answer could include, but is not limited to:

A balanced data flow diagram ensures all incoming data flows to a process, and all the outgoing flows from a process, are maintained when a dataflow is decomposed from one level to the next.

6. a) Explain why a data flow is labelled using a noun.

Description MarksProvides a suitable explanation for the reason why a data flow is labelled using a noun

2

Provides a limited explanation for the reason why a data flow is labelled using a noun

1

Answer could include, but is not limited to:

A dataflow describes a single piece of data or logical collection of data; it is not an object (Entity) or an action (Process).

b) Explain why a process is described using a verb.

Description MarksProvides a suitable explanation for the reason why a process is labelled using a verb 2Provides a limited explanation for the reason why a process is labelled using a verb 1Answer could include, but is not limited to:

A process describes a function or activity that operates for a specific reason within the data flow.


7

7. Below is an incomplete Context Diagram for the Ballajura Independent Supermarket.

a) Complete the diagram by providing the missing labels for the entity, the system, and the external flows.

Description Marks

Correctly labels the Context Diagram1–4

(1 mark each)Correctly labelled diagram

b) Based on the Context Diagram given in 7 (a) and the information in the scenario, create a Level 0 DFD for the ordering process used at the Ballajura Independent Supermarket.

Description MarksIdentifies from the scenario the following elements of the Data Flow Diagram Data stores – stock and orders Entity – supplier Processes – check low stock levels, sort supplier lists, create supplier orders,

check delivery, and update stock Data flows – low stock levels, supplier order lists, orders x 3, delivery note,

confirmed stock, stock update and stock level

1–21

1–5

1–9Correctly uses diagrammatic conventions (as per Yourdon/DeMarco) Data flows – line with arrow Processes – circle Data stores – open ended box/two parallel lines Entities – rectangle

1111

Provides a Data Flow Diagram that: has a logical structure and flow representing the scenario is balanced with the Context Diagram

11

Total 23


Ballajura Independent

Supermarket (1)

Order details (1)

Supplier (1)

Delivery note details (1)

8

Sample completed L0 DFD


9


Assessment type: Theory test: System analysis and development

ConditionsTime for the task: 1 period in class


1. List the six (6) stages of the systems development life cycle approach. (6 marks)

Stage 1: _________________________________________________________________

Stage 2: _________________________________________________________________

Stage 3: _________________________________________________________________

Stage 4: _________________________________________________________________

Stage 5: _________________________________________________________________

Stage 6: _________________________________________________________________

2. List three (3) differences between secondary storage and primary storage. (3 marks)

Difference 1:_________________________________________________________________

Difference 2: _________________________________________________________________

Difference 3: _________________________________________________________________

3. List three (3) components of a computer program. (3 marks)

Component 1: _________________________________________________________________

Component 2: _________________________________________________________________

Component 3: _________________________________________________________________


10

4. The table below lists common input and output devices, some of which can be used for both input and output. Complete the table by placing a tick in the input, output or both input and output columns for each device.

(6 marks)

Device Input Output Both Input and OutputMouse

Speaker

Printer

Microphone

Touch screen

Scanner

5. Based on the information below: a) identify the computer system that you would recommend for a business producing

commercial videosb) describe two (2) reasons for your choice.

(5 marks)

Product components System 1 System 2CPU Intel Core 2 Duo 3.2 GHz

processorIntel i7 3.2 GHz processor

RAM 2 GB RAM 8 GB RAMHard Drive 500 GB 2 TBOptical Drive 52 speed CD RW 16 speed DVD RWVGA Card On board video 768 MB NVIDIA GTX 460

PCI-E with mini HDMIMonitor 17” LCD panel 24” LCD panelOther Swann DV Home Pro Firewire

cardSwann DV Home Pro Firewire card

Operating System Windows 7 (Home Premium) Windows 7 (Professional 64-bit)

System recommended:

System 1 System 2

Reason 1: ____________________________________________________________________

_____________________________________________________________________________

_____________________________________________________________________________

_____________________________________________________________________________


11

Reason 2: ____________________________________________________________________

_____________________________________________________________________________

_____________________________________________________________________________

_____________________________________________________________________________

6. State the role of each of the following parts of the central processing unit. (5 marks)

Register: _____________________________________________________________________

_____________________________________________________________________________

Arithmetic logic unit: ___________________________________________________________

_____________________________________________________________________________

Program counter: ______________________________________________________________

_____________________________________________________________________________

System clock: _________________________________________________________________

_____________________________________________________________________________

Control unit: __________________________________________________________________

_____________________________________________________________________________

7. Describe the boot process (Powerup to OS Booting). (3 marks)

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________


12

8. List two (2) advantages of an organisation using a standard operating environment. (2 marks)

Advantage 1:________________________________________________________________

Advantage 2: _________________________________________________________________

9. Describe the Fetch-execute cycle. (4 marks)

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

10. Explain one (1) reason why an organisation would develop an ICT code of conduct. (3 marks)

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

Total = 40 marks


13

Marking key for sample assessment task 2 – Unit 1

1. List the six (6) stages of the systems development life cycle approach.

Description Marks

Correctly lists the stages of the systems development life cycle approach1–6

(1 mark for each stage)Answer:

Preliminary analysis Analysis Design Development Implementation Evaluation and maintenance

2. List three (3) differences between secondary storage and primary storage.

Description Marks

Correctly identifies differences between secondary storage and primary storage

1–3(1 mark for each

difference)Answer could include, but is not limited to: Storage medium

primary memory is stored on semi-conductors whereas secondary memory is stored on optical or magnetic media (Note: exception Solid State Drives)

Speed primary storage provides faster data access that secondary storage primary storage operates at a speed compatible with the processing speed of a CPU

Volatility generally, primary storage (Random Access Memory RAM) stores data for a limited time while

power is supplied to the computer whereas secondary storage stores data after the computer is turned off

Access data needs to be transferred from secondary storage to primary storage before the computer can

use the data Location

primary storage is usually located on the computer motherboard whereas secondary storage is located external to the motherboard

Cost primary storage is expensive per Gigabyte, when compared to magnetic media

3. List the three (3) components of a computer program.

Description Marks

Lists the components of a computer program1–3

(1 mark for each component)

Answer: input processing output


14

4. The table below lists common input and output devices, some of which can be used for both input and output. Complete the table by placing a tick in the input, output or both input and output columns for each device.

Description MarksCorrectly completes the table indicating whether each device is an input, or output device or both input and output device

1–6(1 mark each)

Completed tableDevice Input Output Both Input and OutputMouse

Speaker

Printer

Microphone

Touch screen

Scanner

5. Based on the information below: a) identify the computer system that you would recommend for a business producing

commercial videos.b) describe two (2) reasons for your choice.

Description MarksCorrectly identifies that computer system 1 is most suitable for producing commercial videos

1

Subtotal 1Reason 1Provides a description of reason 1 for recommended computer system 2Provides a limited description of reason 1 for recommended computer system 1

Subtotal 2Reason 2Provides a description of reason 2 for recommended computer system 2Provides a limited description of reason 2 for recommended computer system 1

Subtotal 2Total 5

Reasons could include, but are not limited to: Faster CPU Larger capacity RAM Larger hard disk drive Larger capacity optical drive Larger LCD monitor with larger Screen size Better operating system: Windows 7 professional 64 Bit


15

6. State the role of each of the following parts of the central processing unit.

Description MarksCorrectly states the role of the part of the central processing unit 1–5

(1 mark for each part)Answer could include, but is not limited to: Registers: is a small amount of storage available to the CPU Arithmetic logic unit (ALU): performs integer arithmetic and logical operations Program counter: a program counter is a register that contains the address (location) of the

instruction being executed at the current time, or can be next address System clock: regulates the function and timing of all computer functions of the processor Control unit (CU): directs operation of the processor

7. Describe the purpose of the boot process (Powerup to OS Booting).

Description MarksProvides a detailed description of the boot process 3Provides a limited description of the boot process 2Lists of the stages of the boot process 1

Total 3Answer could include, but is not limited to:The Powerup to OS Boot is performed by instructions stored in ROM/firmware. These instructions are performed immediately after power on. The purpose of the process is to test the functionality of key operations of the computer prior to loading the operating system. The boot process is complex, lengthy and dependent upon the hardware platform.

8. List two (2) advantages of a standard operating environment.

Description MarksLists advantages of a standard operating environment 1–2

(1 mark each)Answer could include, but is not limited to: Reduced costs

maintenance (hardware, software and operating system) costs purchase cost of software total cost of ownership deployment cost

Consistent software base Improved service support Software deployment is quicker and maintained more easily Improved computer and network functionality


16

9. Describe the Fetch-execute cycle.

Description MarksProvides a detailed description of the Fetch-execute cycle including the role of the program counter 4

Provides a description of the Fetch-execute cycle 3

Provides a brief description of the Fetch-execute cycle 2

List the stages of the Fetch-execute cycle 1

Total 4Answer could include, but is not limited to:The Fetch-execute cycle is a process by which a processor fetches a program instruction from its memory, determines what the instruction wants to do, and carries out those actions.The Fetch-execute cycle includes the following stages: fetch the instruction decode the instruction execute the instruction store the result.The result generated by the execute phase is stored in the main memory, and/or sent to an output device. The program counter is updated with feedback from the ALU, to a different address from which the next instruction will be fetched.

10. Explain one (1) reason why an organisation would develop an ICT code of conduct.

Description MarksExplains why an organisation would develop an ICT code of conduct, using suitable examples 3

Explains why an organisation would develop an ICT code of conduct 2Provides a limited explanation why an organisation would develop an ICT code of conduct, using suitable examples

1

Total 3Answer could include, but is not limited to:A code of conduct is a voluntary set of rules that people agree to follow or abide by when using an organisation’s computer hardware, software or resources. A code of conduct is not a legal document, but is considered binding once agreement is provided. A code of conduct ensures a safe, reliable ICT environment and prevents misuse of ICT resources by employees.

An ICT code of conduct would cover things such as: usage of the internet security and use of user names and passwords use of equipment and software


17


Assessment type: Practical test – Spreadsheet

ConditionsTime for the task: two periods in class Period 1: 30 minutes for the planning and drafting of the spreadsheet (you will not have access

to a computer) Period 2: 30 minutes for the practical test.


Create a spreadsheet for the Ballajura Independent Supermarket which:

calculates the total daily pay for each employee in the supermarket

calculates the total weekly pay for each employee, including overtime, given the days worked

and the total hours worked per day

calculates the total salary paid for all employees

provides additional calculations to enhance the provision of information within the spreadsheet

uses an appropriate format and structure

provides appropriate instructions for the user (either on the spreadsheet or as a separate

document).

The tables below provide the data you are to use in your spreadsheet. As the tables are linked, your spreadsheet will require the use of lookup tables.

You are required to submit: completed draft sheets and/or notes used in the planning stage

a digital copy of finished spreadsheet via email

a document with instructions for the user (if not included on the spreadsheet).

Total = 32 marks


18

Staff hours worked last week

Employee Position Base payrate ($/hr)

Hours worked

Mon Tues Wed Thurs Frid Sat Sun

Harry Grapes Butcher 18 9 9 9 0 9 6 10

Marg Plum Manager 20 11 8 9 9 0 5 5

Monica Nguyen Checkout 15 12 9 0 9 6 9 9

Normal and special pay rates

Normal work hours

Mon to Fri overtime <= 3

hours

Mon to Fri overtime >3

hours

Satnormal hours

Sun and holiday normal hours

Weekend and holidays

overtime hours6.30am to 3.30pm

(9 hours)+ 25% + 45% + $3 per hour + $4 per hour + 50%


19

Marking key for sample assessment task 3 – Unit 1Description Marks

Draft sheets and/or notes provide indication of the required layout elements: employee names lookup table days worked hours worked total values formatting and structure

1–6(1 mark per

element)

Draft sheets and/or notes provide indication of the appropriate instructions for the user 1Draft sheets and/or notes provide indication of the required calculation methods: calculation of total pay (daily and weekly) for each employee use of a function to calculate the overtime for each employee additional formulae/function to provide total salary paid for all employees additional formulae/function to enhance the provision of information within the

spreadsheet

1–4(1 mark per

method)

Subtotal 11Spreadsheet solution reflects all of the layout elements in the draft notesSpreadsheet solution reflects some of the layout elements in the draft notes

21

Subtotal 2Spreadsheet solution includes: calculation of total pay (daily and weekly) for each employee use of a function to calculate the overtime for each employee additional formulae/function to provide total salary paid for all employees additional formulae/function to enhance the provision of information within the

spreadsheet

1–31–31–6

1–4Subtotal 16

Spreadsheet provides: a complete and workable solution a partial but workable solution an incomplete solution

321

Subtotal 3Total 32
