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1.Resources and clients transparency that allows movement within a system is called ____________________
(A) Mobility transparency
(B) Concurrency transparency
(C) Replication transparency
(D) Performance transparency
answer :A
2.A distributed system is defined as a collection of autonomous computers linked by a network with software designed to produce an integrated computing facility. True or False?
(A) FALSE
(B) TRUE
answer: B
(A) Resource sharing
(B) Incremental growth
(C) Reliability
(D) None of the above
answer: C
4.If one site fails in distributed system, ___________
(A) the remaining sites can continue operating
(B) all the sites will stop working
(C) directly connected sites will stop working
(D) none of the mentioned
answer: A
5The capability of a system to adapt the increased service load is called _________
(A) c.apacity
(B) tolerance
(C) scalability
(D) none of the mentioned
answer:C
6.What are characteristic of Network Operating Systems ?
(A) Users are aware of multiplicity of machines
(B) They are transparent
(C) They are simple to use
(D) All of the mentioned
answer : A
7.What is the characteristics of atomicity ?
(A) Use communication links
(B) One processor as coordinator which handles all requests
(C) When responses are received from all processes, then process can enter its Critical Section
(D) All operations associated are executed to completion or none are performed
10.A set of highly integrated machines that run the same process in parallel is known to be ___________
31.What are the characteristics of tightly coupled system ? I. Different clock II. Use communication links III. Same clock IV. Distributed systems
1.Which layer is the layer closest to the transmission medium ?
(A) Physical
(B) Data link
(C) Network
(D) Transport
1.What is common problem found in distributed system ?
31.In ________________________ each node periodically sends a message to the time server.
1.A process is already split into pieces, called________________.
answer :C
answer :C
26.A thread shares its resources(like data section, code section, open files, signals) with ___________
1._____ transparency hides that a resource may move to the another location.
a.Access transparency
b.Migrationtransparency
c.Replicationtransparency
d.Failure transparency
answer: a
Migration transparency
2 ._________ transparency hides failure and recovery of a resources.
a.Location transparency
b.Access transparency
c.Failure transparency
d.Migrationtransparency
answer:c
Failure transparency
3 Which of the following is a form of distributed information system?
a.Home system
b.Transaction Processing System
c.Pervasive system Enterprise Resource
d.Planning system
answer:b
TransactionProcessing System
4 Which of the following is not a distributed computing model?
a.Processor-pool model
b.Workstation server model
c.Failure model
d.peer-to-peer
answer:c
Failure model
5.Which of the following is not a layer in architecture of grid computing?
a.Collective layer
b.Connectivity layer
c.Remote reference layer
d.Fabric layer
answer: c
Remote reference layer
6 NOS supports ________ OS in all nodes.
a.Same
b.Different
c.Linux based
d.Windows Based
answer:b
Different
7 DOS gives the view of ___________ System.
a.Multi-processor
b.Uniprocessor
c.Multi-controller
d.Virtual Uniprocessor
answer:d
Virtual Uniprocessor
8 Fault tolerance in distributed systems is the method used for ___________.
a.Heterogeneity
b.Security
c.Flexibility
d.Reliability
answer:d
Reliability
9.Hiding the complicacy of the system from user in distributed environment is known as _____.
a.Heterogeneity
b.Security
c.Flexibility
d.Transparency
answer:d
Transparency
10 A distributed system is a collection of _______________ computers that appears to its users as a single coherent system.
a.Independent
b.Interconnected
c.Interrelated
d.Shared
answer:b
independent
11 Which of the following is correct about migration transparency?
a.Local and remote objects should be accessed in a uniform way
b.Objects are referred by logical names which hide the physical location of the objects
c.Movement of object from one system to the other is invisible to user
d.Sharing of objects without interference
answer:c
Movement of object moving from one system to the other is invisible to user
12 Middleware called __________ for connecting independent. systems together and makes them work together.
a.Homogeneous
b.Glue-code
c.Heterogeneous
d.Concurrent
answer:c
Glue-code
13 MPI_bsend is equivalent to _____.
a.One way RPC
b.Two wayRPC
c.Synchronous RPC
d.Asynchronous RPC
answer:a
One way RPC
14 _______socket primitive attach local address to the socket
a.Accept
b.Bind
c.Connect
d.Listen
answer:b
Bind
15 The calls, whose caller has expired due to node crash, is known as
a.orphan
b.dead
c.alive
d.request
answer:a
orphan
16 In which type of communication, messages are stored as long as sender and receiver are executing?
a.Persistent
b.Transient
c.RMI based Communication
d.RPC based Communicationanswer:b
Transient
17 Amazon SQS is an example of _______.
a.RPC
b.RMI
c.Group communication
d.Message Queuing System
answer:d
Message Queuing System
18 The client stub is called by the __.
a.server
b.client
c.host
d.client and server
answer:b
client
19 Which ordering uses global timestamps as message id?
a.Total ordering
b.FIFO ordering
c.Causal Ordering
d.Absolute Ordering
answer:d
Absolute Ordering
20 Isosynchronous is a type of which communication _____.
a.MOM
b.IPC
c.Stream Oriented Communication
d.Group Communication
answer:c
Stream Oriented Communication
1. What are the different ways in which clients and servers are dispersed across machines?
a) Servers may not run on dedicated machines
b) Servers and clients can be on same machines
c) Distribution cannot be interposed between a OS and the file system
d) OS cannot be distributed with the file system a part of that distribution
Answer: b
Explanation: None.
2. What are not the characteristics of a DFS?
a) login transparency and access transparency
b) Files need not contain information about their physical location
c) No Multiplicity of users
d) No Multiplicity if files
Answer: c
Explanation: None.
3. What are characteristic of a DFS?
a) Fault tolerance
b) Scalability
c) Heterogeneity of the system
d) Upgradation
Answer: d
Explanation: None.
4. What are the different ways file accesses take place?
a) sequential access
b) direct access
c) indexed sequential access
d) all of the mentioned
Answer: d
Explanation: None.
5. Which is not a major component of a file system?
a) Directory service
b) Authorization service
c) Shadow service
d) System service
Answer: c
Explanation: None.
6. What are the different ways mounting of the file system?
a) boot mounting
b) auto mounting
c) explicit mounting
d) all of the mentioned
Answer: d
Explanation: None.
7. What is the advantage of caching in remote file access?
a) Reduced network traffic by retaining recently accessed disk blocks
b) Faster network access
c) Copies of data creates backup automatically
d) None of the mentioned
Answer: a
Explanation: None.
8. What is networked virtual memory?
a) Caching
b) Segmentation
c) RAM disk
d) None of the mentioned
9. What are the examples of state information?
a) opened files and their clients
b) file descriptors and file handles
c) current file position pointers
d) all of the mentioned
Answer: d
Explanation: None.
10. Which is not an example of state information?
a) Mounting information
b) Description of HDD space
c) Session keys
d) Lock status
Answer: b
Explanation: None
11. What is a stateless file server?
a) It keeps tracks of states of different objects
b) It maintains internally no state information at all
c) It maintains some information in them
d) None of the mentioned
Answer: b
Explanation: None.
12. What are the characteristics of the stateless server?
a) Easier to implement
b) They are not fault-tolerant upon client or server failures
c) They store all information file server
d) They are redundant to keep data safe
Answer: a
Explanation: None.
13. Implementation of a stateless file server must not follow?
a) Idempotency requirement
b) Encryption of keys
c) File locking mechanism
d) Cache consistency
Answer: b
Explanation: None.
14. What are the advantages of file replication?
a) Improves availability & performance
b) Decreases performance
c) They are consistent
d) Improves speed
Answer: a
Explanation: None.
15. What are characteristic of NFS protocol?
a) Search for file within directory
b) Read a set of directory entries
c) Manipulate links and directories
d) All of the mentioned
Answer: d
Explanation: None.
16. What is the coherency of replicated data?
a) All replicas are identical at all times
b) Replicas are perceived as identical only at some points in time
c) Users always read the most recent data in the replicas
d) All of the mentioned
Answer: d
Explanation: None.
17. What are the three popular semantic modes?
a) Unix, Coherent & Session semantics
b) Unix, Transaction & Session semantics
c) Coherent, Transaction & Session semantics
d) Session, Coherent semantics
Answer: b
Explanation: None.
18. What are the characteristics of Unix semantics?
a) Easy to implement in a single processor system
b) Data cached on a per process basis using write through case control
c) Write-back enhances access performance
d) All of the mentioned
Answer: d
Explanation: None.
19. What are the characteristics of transaction semantics?
a) Suitable for applications that are concerned about coherence of data
b) The users of this model are interested in the atomicity property for their transaction
c) Easy to implement in a single processor system
d) Write-back enhances access performance
Answer: b
Explanation: None.
20. What are non characteristics of session semantics?
a) Each client obtains a working copy from the server
b) When file is closed, the modified file is copied to the file server
c) The burden of coordinating file sharing is ignored by the system
d) Easy to implement in a single processor system
Answer: d
Explanation: None.
21. The file once created can not be changed is called ___________
a) immutable file
b) mutex file
c) mutable file
d) none of the mentioned
Answer: a
Explanation: None.
22. ______ of the distributed file system are dispersed among various machines of distributed system.
a) Clients
b) Servers
c) Storage devices
d) All of the mentioned
Answer: d
Explanation: None.
23. _______ is not possible in distributed file system.
a) File replication
b) Migration
c) Client interface
d) Remote access
Answer: b
Explanation: None.
24. Which one of the following hides the location where in the network the file is stored?
a) transparent distributed file system
b) hidden distributed file system
c) escaped distribution file system
d) spy distributed file system
Answer: a
Explanation: None.
25. In a distributed file system, when a file’s physical storage location changes ___________
a) file name need to be changed
b) file name need not to be changed
c) file’s host name need to be changed
d) file’s local name need to be changed
Answer: b
Explanation: None.
26. In a distributed file system, _______ is mapping between logical and physical objects.
a) client interfacing
b) naming
c) migration
d) heterogeneity
Answer: b
Explanation: None.
27. In a distributed file system, a file is uniquely identified by ___________
a) host name
b) local name
c) the combination of host name and local name
d) none of the mentioned
Answer: c
Explanation: None.
28. There is no need to establish and terminate a connection through open and close operation in ___________
a) stateless file service
b) stateful file service
c) both stateless and stateful file service
d) none of the mentioned
Answer: a
Explanation: None.
29. In distributed file system, file name does not reveal the file’s ___________
a) local name
b) physical storage location
c) both local name and physical storage location
d) none of the mentioned
Answer: b
Explanation: None.
30. Which one of the following is a distributed file system?
a) andrew file system
b) network file system
c) novel network
d) all of the mentioned
Answer: d
Explanation: None.
31.What are characteristics of Naming and Name resolution ?
answer: C
answer: A
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