2900172
Questão 1
Questão
Which of these is not a form of transparency?
Responda
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Retry
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Relocation
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Concurrency
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Access
Questão 2
Questão
Which of these is not a form of transparency?
Responda
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Access control
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Location
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Replication
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Failure
Questão 3
Questão
Which of these is a situation when Decentralized algorithms should be used?
Responda
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Failure of one machine does not ruin the algorithm
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Every machine has complete information about the system state
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Machines make decisions based only on global information
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There is a global clock
Questão 4
Questão
Which scaling technique does "Split and spread functionality across the system" describe
Responda
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Distribution
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Decentralised algorithms
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Concurrency
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Heterogeneity
Questão 5
Questão
What are the dimensions of scalability?
Responda
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Size, Geographically, Administrativley
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Size, Geographically
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Users, Resources
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CPU, RAM, number of nodes
Questão 6
Questão
What does ACID stand for?
Responda
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Atomicity, Consistency, Isolation, Durability
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Atomicity, Correctness, Isolation, Durability
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Atomicity, Consistency, Independence, Durability
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Atomicity, Consistency, Isolation, Dependability
Questão 7
Questão
Which of these achieves hiding communication latencies?
Responda
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Asynchronous communication
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Caching
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Multicast
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Dual network interface
Questão 8
Questão
What is the goal of middleware?
Responda
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Provide distribution transparency
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Offer local services to remote clients
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Hide differences between different systems
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To provide network reliability
Questão 9
Questão
What are Hiding communication latencies, Distribution and Replication?
Responda
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Scaling techniques
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Middleware features
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Reliability methods
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The difference between a NOS and DOS
Questão 10
Questão
When latency is a problem, which technique should be used if asynchronous communication cannot be used?
Responda
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Communication should be reduced
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Compression should be used
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You should make multiple concurrent requests while the user is waiting
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You should upgrade the connection capabilities, eg. to get a gigabit connection
Questão 11
Questão
What are the properties of openness?
Responda
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Interoperability, Portability, Heterogeneity
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Cross-platform, XML, Dynamic Invocation
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Interoperability, Dynamic, Heterogeneity
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Heterogeneity, Standardization, Interoperability
Questão 12
Questão
Which of these are all forms of transparency?
Responda
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Access, Location, Concurrency
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Relocation, Replication, Caching
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Mitigation, Replication, Failure
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Access, Connectivity, Migration
Questão 13
Questão
What type of transparency is "Hide that a resource may move to another location"
Responda
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Migration
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Location
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Relocation
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Transferral
Questão 14
Questão
Which of these is NOT a false assumption often made by first time distributed systems developers?
Responda
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All systems have the same software
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Bandwidth is infinite
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The network is secure
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There is one administrator
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The topology does not change
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The network is homogeneous
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