Mobile Storage and Big Data

Question 1

What risks are introduced by the ability to store data on mobile devices?

Answer 1

Increase in vulnerability of sensitive material, easier to be lost or stolen
Storage constraints

Question 2

What is data synchronization?

Answer 2

Process of establishing consistency among data across multiple different sources

Question 3

What is data backup?

Answer 3

Process of creating and storing copies of data that can be used to protect againts data loss

Question 4

What do data backup and data synchronization have in common?

Answer 4

Both involve creating copies of a file/data, copying the new or modified file instead of entire source

Question 5

How do data backup and data synchronization differ?

Answer 5

If a backup is deleted, still have original copy, if copy is deleted in synchronization it is gone

Question 6

Name advantages of native apps

Answer 6

• Easier to work with native apps
• Peform faster on device
• Access device features
• Provided with tools

Question 7

Name advantages of web apps

Answer 7

• Most recent version is always avaliable and used by everyone
• manipulated so can be compatabile with older devices

Question 8

Name disadvantages of native apps

Answer 8

• Can’t guaretee that all users are using the same version
• higher cost
• harder to mantain

Question 9

Name disadvantages of web apps

Answer 9

• limited scope as far as accessing device features

- not listed in an app store

Question 10

Which V properties are commonly used to characterize big data?

Answer 10

Volume
Variety
Velocity

Question 11

Describe Volume

Answer 11

Larger amounts of data, ever growing data of all types

Question 12

Describe Variety

Answer 12

Data is in various forms, structured, unstructured, semi-structured

Question 13

Describe Velocity

Answer 13

Data to be processed is rapidly accumlated, new data arriving frequently and from multiple sources