Felix Esperson

Felix Esperson

Member since
@fesperson-

N7 content developer & IB DP CS Tutor. Bachelor of Science (undergraduate) at The University of Melbourne.

(a).
Determine the decimal value of the binary ‘1001’
[1]
(b).
Determine the binary value of the denary ‘67’
[1]
(c).
Outline why the binary number system is used in computing
[2]
To convert decimal to binary, we use a simple handwritten algorithm, this same logic can be applied in pseudocode.
(d).
In pseudocode, using a stack, write an algorithm that finds the binary value of a decimal input by outputting the digits one by one
[6]
Extended Response10 MarksCommunity
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Felix Esperson
A bookshop is planning on implementing a new computer system to manage sales. The shop has 2 managers, 10 shop assistants and a security guard.
(a).
Identify two stakeholders in the new system
[2]
(b).
Outline two different forms of data collection that could be used to gain information from stakeholders to create the new system
[4]
(c).
Outline the importance of prototypes when developing new computer systems.
[2]
(d).
The company is proposing to use a direct changeover method to implement the new system, outline one reason why this could be a poor decision.
[3]
(e).
Suggest one alternative changeover process.
[2]
Extended Response13 MarksCommunity
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Felix Esperson
A binary tree is made from the following ordered set {9, 13, 4, 7, 5, 18, 2}, which of the following statements is true about the tree?
(a).
13 is a leaf node
(b).
7 is at a greater depth than 2 in the tree
(c).
7 is a leaf node
(d).
5 is at a greater depth than 18 in the tree
Multiple Choice1 MarkCommunity
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Felix Esperson
(a).
State why user documentation is important
[1]
(b).
State two methods for providing user documentation
[2]
Extended Response3 MarksCommunity
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Felix Esperson
A clothes store currently uses the internal hard drive of a computer to store all their sales data.
(a).
Outline one example of how data loss issues may occur for the store
[2]
(b).
Describe two methods that the store could use to prevent data loss
[3]
Extended Response5 MarksCommunity
43 Uses20 Views1 Like
Felix Esperson
Jessie is planning to build a computer to simulate the complex and computing intensive mathematical models that she is researching.
(a).
Outline one type of computer resource that will likely cause a computer to crash if exhausted
[2]
(b).
Outline one type of computer resource that will not cause a computer to crash if exhausted
[2]
Jessie decides to build a desktop computer with high-end parts including 64gb of RAM, an eight core processor and a powerful graphics card.
(c).
Explain how time slicing will enable Jessie to continue using her computer for other tasks even when a simulation is taking place
[4]
(d).
Outline what will occur if Jessie exceeds 64gb of RAM usage while performing a simulation
[2]
Extended Response10 MarksCommunity
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Felix Esperson
An experimental new laptop is being developed with 512gb of primary memory and no persistent storage beyond a small amount reserved for the Operating System only (insisting users use cloud storage for their files)
Outline a positives and negative of this design choice
[4]
Short Answer4 MarksCommunity
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Felix Esperson
Which of the following methods provides the worst network security for a wireless network?
(a).
Limiting access to the network by the device’s MAC address
(b).
WPA Wireless security protocol
(c).
Limiting access to the network by the device name
(d).
WEP Wireless security protocol
Multiple Choice1 MarkCommunity
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Felix Esperson
Outline, with the aid of an example, why many widely used applications do not come preinstalled on operating systems
[3]
Short Answer3 MarksCommunity
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Felix Esperson
What are the four basic functions of a computer
(a).
Process, input, output, store
(b).
Iterate, compare, output, store
(c).
Display, input, output, store
(d).
Input, output, process, search
Multiple Choice1 MarkCommunity
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Felix Esperson
A bank has designed a new online banking service where their customer’s banking can be managed across the internet.
(a).
Define the term 'data packet'
[1]
(b).
Explain why protocols are necessary with the use of one example
[4]
The bank advises that customers do not use the online banking service on public Wifi.
(c).
State three necessary components to create a public wireless network
[3]
(d).
Outline what may occur if a user tries to access their online banking on public Wifi
[2]
Extended Response10 MarksCommunity
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Felix Esperson
Which of the following hardware is not required to create and connect to a WLAN?
(a).
NIC
(b).
Modem
(c).
Network Switch
(d).
Router
Multiple Choice1 MarkCommunity
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Felix Esperson
Which of the following is not a feature of peer to peer networking
(a).
No central server
(b).
Improved security
(c).
Redundancy/recovery
(d).
Supports file sharing for collaborative work
Multiple Choice1 MarkCommunity
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Felix Esperson
State two methods by which one can obtain system requirements from stakeholders
[2]
Short Answer2 MarksCommunity
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Felix Esperson
Programming languages require no ambiguity and consistent syntax such that the computer knows exactly what to do for a given line of code.
(a).
Define an ‘object’
[1]
(b).
Outline how ‘div’ operator is different to the ‘/’ operator and give one example where the ‘div’ operator would be more useful
[2]
Programming languages allow for abstraction of problems
(c).
Explain how higher level languages enable abstraction
[3]
(d).
Outline the translation process that occurs before a program in a higher level language can be executed
[2]
Extended Response8 MarksCommunity
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Felix Esperson
Which of the following is the correct sequence of a control system in terms of detecting an input all the way to producing an output.
(a).
Logic Operator, Sensor, ADC, DAC, Actuator
(b).
Actuator, ADC, Logic operation, DAC, Sensor
(c).
Sensor, ADC, Transducer, DAC, Actuator
(d).
Sensor, ADC, Logic operation, DAC, Actuator
Multiple Choice1 MarkCommunity
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Felix Esperson
A futuristic solar-power plant on mars needs to coordinate the direction of its solar panels throughout the day to ensure they are always facing the sun.
In this use case, compare the use of a centralised system of control against a distributed system of control
[5]
Short Answer5 MarksCommunity
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Felix Esperson
(a).
In the context of the design process, define iteration
[2]
(b).
In the context of programming, define iteration.
[2]
Extended Response4 MarksCommunity
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Felix Esperson
(a).
Describe a example of an autonomous agent, listing two of its properties
[3]
(b).
State two features of an environment that influence how an autonomous agent that navigates it must be designed
[2]
Extended Response5 MarksCommunity
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Felix Esperson
George buys his lunch from a convenience store each day, but he finds he’s constantly left with small change that he never uses or simply loses. George wants to optimise his purchase such that he spends a whole $10 note every time he visits the store.
(a).
Define the term algorithm
[1]
PRICES is a one-dimensional array of length 30 with the price of a product at each index, such that PRICES[0] = 3.25 for example.
(b).
Write an algorithm using PRICES that outputs the index of each pair of different items with prices that add up to exactly $10
[7]
George is very impressed with his algorithm and decides to integrate it into a program and publish it for free online.
(c).
State why user documentation might be necessary to include with the program
[1]
(d).
Suggest two ways user documentation could be provided
[2]
Extended Response11 MarksCommunity
47 Uses50 Views1 Like
Felix Esperson