DS exam questions Flashcards
Identify characteristics of Peer-to-Peer networks [2]
There is no central adminstrator;
All users of the network have the same importance;
Identity two characteristics of a strong password [2]
More than 6 characters;
Uses both upper and lower case;
Identitify two other methods of authentication [2]
Voice recognition;
PIN;
Explain one reason why bitcoin makes use of a private key and public key encryption [2]
Secure because every bitcoin address has a matching private key of user;
Private keys can be kept in computer files;
Explain one reason why it may be difficult to ensure the security of information in a large peer-to-peer network such as bitcoin [2]
There is no central control, meaning there won’t be any firewall;
Explain one way the bitcoin address may be used to reveal information about a bitcoin user. [2]
The bitcoin address might show additional information such as the IP address.
Identify two file types that could be used for the image in figure 3, which shows the potential tracks of Hurricane Irma. [2]
PNG;
JPEG;
Outline the difference between data and information [2]
Data is a collection of raw and unorganized facts or figures such as characters and numbers;
Information is the proccessed output of data;
Outline why visualization is used to present data [2]
Visualization converts data into charts or graphs, which is way easier to understand;
so it can be presented in a more simplified and understandable manner;
Distinguish between a model and a simulation [2]
A model is a simplified version of reality;
A simulation is the operation of the model over time;
Explain one reason why wind speed data would be sampled more frequently than temeprature data in a hurricane.
Wind changes must be fast;
The more frequently it must be sampled;
Explain why the data collected about hurricane irma was not encrypted prior to be transmitted.
Not encrypting the data allows for wider use;
For others to improve thier hurricane models;
