Felix Esperson

Member since Apr 2021

@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

63 Uses56 Views2 Likes

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

45 Uses46 Views0 Likes

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]

Short Answer2 MarksCommunity

44 Uses27 Views0 Likes

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 Currently the supermarket uses an outdated and non-extensible system to process purchases.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]

Extended Response13 MarksCommunity

66 Uses64 Views0 Likes

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]

Short Answer4 MarksCommunity

48 Uses49 Views3 Likes

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]

Short Answer5 MarksCommunity

32 Uses23 Views0 Likes

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

Multiple Choice1 MarkCommunity

32 Uses18 Views0 Likes

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]

Extended Response11 MarksCommunity

74 Uses65 Views2 Likes

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]

Short Answer5 MarksCommunity

13 Uses17 Views1 Like

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

31 Uses14 Views0 Likes

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

25 Uses14 Views0 Likes

(a).

State why user documentation is important

[1]

(b).

State two methods for providing user documentation

[2]

Extended Response3 MarksCommunity

38 Uses18 Views0 Likes

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

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

20 Uses19 Views0 Likes

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

22 Uses23 Views0 Likes

Outline, with the aid of an example, why many widely used applications do not come preinstalled on operating systems

[3]

Short Answer3 MarksCommunity

24 Uses18 Views0 Likes

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

19 Uses14 Views0 Likes

Which of the following hardware is not required to create and connect to a WLAN?

Multiple Choice1 MarkCommunity

39 Uses21 Views0 Likes

Which of the following is not a feature of peer to peer networking

Supports file sharing for collaborative work

Multiple Choice1 MarkCommunity

33 Uses11 Views0 Likes

State two methods by which one can obtain system requirements from stakeholders

[2]

Short Answer2 MarksCommunity

27 Uses9 Views0 Likes