Felix Esperson

Felix Esperson

Member since
@fesperson-

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

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Extended Response10 MarksCommunity
(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]
73952
Felix Esperson
Extended Response13 MarksCommunity
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]
511060
Felix Esperson
Short Answer2 MarksCommunity
A library has advised that users of its wifi ensure they browse the internet with a VPN connection, outline why this could be a good idea
[2]
52690
Felix Esperson
Extended Response13 MarksCommunity
A supermarket wishes to do focused advertising on its customers who sign up with an online account. In order to do this advertising, the supermarket plans to collect data about each individual’s purchases and make predictions about what they may want to buy. Currently the supermarket uses an outdated and non-extensible system to process purchases.
(a).
Discuss two different ways the supermarket may convert from their current system to a new system that can support the proposed data collection.
[5]
(b).
State two ethical considerations that must be made with respect to the data collection and advertising
[2]
Rather than hire new members of its IT department to manage the new system, the supermarket is intending to retrain its current staff.
(c).
Compare two methods of staff training
[4]
The supermarket will need to store the user’s data using local servers on the same network as their free Wifi. Customers are concerned about the security of their data.
(d).
Outline how use of VLANs could improve security over the network
[2]
721360
Felix Esperson
Short Answer4 MarksCommunity
A large video game company has recently acquired a smaller video game studio. The two companies use different operating systems to develop their games and the small studio will need to merge or change their software system to match that of the larger company.
Give two examples of problems that may arise when the systems are merged.
[4]
52863
Felix Esperson
Short Answer5 MarksCommunity
Create an algorithm that searches through an array, NUMS, of 30 numbers and outputs true if it contains only even or only odd numbers and False if it contains both even and odd numbers
[5]
35490
Felix Esperson
Multiple Choice1 MarkCommunity
What are the final values of X and Y after following code is run X=1 Y=1 While X < 500 X = X + X Y = Y + 1 end while
(a).
Y = 10, X = 512
(b).
Y = 9, X = 512
(c).
Y = 10, X = 256
(d).
Y = 9, X = 256
35420
Felix Esperson
Extended Response11 MarksCommunity
A local green grocer is finally planning on installing a computer system to manage their sales and stock data after having used pen and paper for the same tasks for many years. The store owner has no understanding of digital technology.
(a).
Define a peripheral device
[1]
(b).
Identify three examples of roles that a computer can take within a network
[3]
In order to sell more produce, the store owner's granddaughter has suggested they open an online store.
(c).
Outline what the client-server model is and how it applies to opening an online store
[3]
(d).
Discuss any safety / security issues that may arise from individuals who lack technology literacy accessing the world wide web
[4]
821202
Felix Esperson
Short Answer5 MarksCommunity
Write an efficient algorithm that checks if all the numbers in array ARRAY (length 30) are odd at odd indexes and even at even indexes. The algorithm should output the boolean True if the above condition is met and false otherwise
[5]
16421
Felix Esperson
Multiple Choice1 MarkCommunity
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
36440
Felix Esperson
Multiple Choice1 MarkCommunity
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
28570
Felix Esperson
Extended Response3 MarksCommunity
(a).
State why user documentation is important
[1]
(b).
State two methods for providing user documentation
[2]
42590
Felix Esperson
Extended Response5 MarksCommunity
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]
46491
Felix Esperson
Extended Response10 MarksCommunity
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]
26680
Felix Esperson
Short Answer4 MarksCommunity
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]
25500
Felix Esperson
Short Answer3 MarksCommunity
Outline, with the aid of an example, why many widely used applications do not come preinstalled on operating systems
[3]
27420
Felix Esperson
Multiple Choice1 MarkCommunity
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
22350
Felix Esperson
Multiple Choice1 MarkCommunity
Which of the following hardware is not required to create and connect to a WLAN?
(a).
NIC
(b).
Modem
(c).
Network Switch
(d).
Router
43560
Felix Esperson
Multiple Choice1 MarkCommunity
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
37440
Felix Esperson
Short Answer2 MarksCommunity
State two methods by which one can obtain system requirements from stakeholders
[2]
31340
Felix Esperson