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WorksheetsTopic 13 revision
Total questions: 34
Worksheet time: 20mins
A distributed system contains _____ nodes.
zero node
one node
two node
multiple node
In distributed system, each processor has its own ___________
local memory
clock
both local memory and clock
none of the mentioned
The capability of a system to adapt the increased service load is called ___________
scalability
tolerance
capacity
none of the mentioned
The fact that if one site fails in distributed system then the remaining sites can continue operating is called ....
fault tolerance
transparency
availability
scalability
All fault-tolerant techniques rely on
Integrity
Dependability
Redundancy
transparency
The characteristics of a distributed system are
Resource sharing
Scalability
transparency
concurrency
centralisation
Which of the following is a popular hypervisor for virtualisation?
VirtualBox
Microsoft Word
Adobe Photoshop
Google Chrome
What is the main advantage of using virtualisation?
Increased hardware costs
increased flexibility
Improved resource utilisation
Decreased security
Which of the following is a benefit of using virtualisation in a data centre?
Reduced hardware costs
Improved resource utilisation
Increased flexibility
All of the above
Which of the following is NOT a feature of distributed systems?
high velocity
fault tolerance
high availability
concurrency
Which of these are true for unsupervised machine learning?
Needs a labeled data set
Finds identifying features
Good for classification and regression
Clusters data
Virtual machines run on a hypervisor while containers run on a ... ?
container manager
container engine
kernel
container box
Containers are faster than virtual machines. True or false?
True
False
Select the examples of distributed systems
Web search
Massively multiplayer online games
Torrent file transfer
What is containerisation in visualisation?
A technique for compressing visual data to save space
A method for packaging and deploying visualisations as self-contained units
A way of reducing visual complexity to improve user experience
A form of data encryption used in visualisations
Which of the following is NOT a benefit of containerisation in visualisation?
Improved portability of visualisations across different environments
Reduced risk of dependencies and version conflicts
Enhanced security
Increased speed of access
Which technology is commonly used for containerisation?
Docker
Python
Virtual Box
Access
Which open source distributed processing framework helps manage data processing and storage for big data applications running in clustered systems?
SQL
Hadoop
NoSQL
Cassandra
Which of the following are characteristics of a good user interface?
Intuitive/familiar
Attractive
Consistent
Accessible
cheap
Which of these are haptic human computer interaction methods?
eye tracking device
Braille displays
virtual retinal display
voice commands
touch screen
Which of these two could be used to test a software on different operating systems?
Virtual machine
Container
Advantages of server virtualisation?
Lower total operational cost
More efficient utilisation of physical servers
hardware failure has less impact
the possiblity to run many servers on one piece of hardware
Reduced downtime
Asymmetric encryption uses only 1 key.
True
False
Maybe
God Knows
Which of these are not contained in a Digital Certificate?
the certificate holder's public key
the signature algorithm used
the CA that issued the certificate
the period during which certificate is valid
What is the role of a certificate authority (CA) ?
Which of these is used to verify the authenticity of digital messages or documents
Digital signature
Digital certificate
symmetric encryption
machine learning
Which of these is used to prove the authenticity of a device?
Digital signature
Digital certificate
symmetric encryption
machine learning
Who really checks the validity of a Digital certificate?
The user
The Browser
The server
The web application
It is a one-way function whose output values are all the same length
hash function
encryption algorithm
machine learning algorithm
bcrypt
Why does NSA use hybrid encryption rather than asymmetric?
it is faster and as secure
it is more secure
it is easier to implement and as secure
it is harder to intercept the key
What is the most secure way of storing passwords?
encrypted
hashed
hash+salt+cost
hash + salt + cost + encryption
