Question 201 : ____ is software architecture used to build a distributed system from a network connected by high speed network.
- DOS
- NOS
- Middleware
- Operating system
Question 202 : _____ model consist of multiple work stations coupled with powerful servers with extra hardware to store the file system s and other software like databases
- Workstation model
- Workstation -server model
- Processor-pool model
- Client-server model
Question 203 : This is not the type of the solution adopted to kill the orphnas when client crashes in failure semantics of the RPC.
- extermination
- expiration
- reincarnation
- shut down the client
Question 204 : A data consistency model in which shared data are made consistent when a critical region is exited.
- Casual consistency
- Sequential consistency
- Release consistency
- Strict consistency
Question 205 : Virtualization that creates one single address space architecture is called ______.
- Loosely coupled
- Peer-to-Peer
- Space-based
- Tightly coupled
Question 206 : In distributed file system, when a file’s physical storage location changes
- file name need to be changed
- file name need not to be changed
- file’s host name need to be changed
- file’s local name need to be changed
Question 207 : A Parallel computer is the computer system capable of
- Parallel Computing
- Centralized Computing
- Decentralized Computing
- Distributed Computing
Question 208 : Which is the approach for naming the files i)Files are named with a combination of host and local name. ii)Remote directories are mounted to local directories iii)A single global name structure spans all the files in the system
- i only
- ii only
- ii and iii only
- i,ii and iii
Question 209 : The data sequence of information that is time-dependent is called ___________
- Stream of data
- traditional data
- transactional data
- spatial data
Question 210 : Mapping of network file system protocol to local file system is done by ____________
- network file system
- local file system
- volume manager
- remote mirror
Question 211 : Writes that are potentially casually related must be seen by all processes in the same order. Concurrent writes may be seen in a different order on different machines is the necessary condition in --------
- FIFO consistency
- LRU consistency
- Optimal consistency
- Casual consistency
Question 212 : A process is _________________
- program in main memory
- Program in cache memory
- program in secondary storage
- program in execution
Question 213 : Single coordinator approach has the following disadvantages : i.Simple implementation, ii.Simple deadlock handling, iii.Bottleneck
- i
- ii
- ii and iii
- iii
Question 214 : Which one is coordinator selection algorithm?
- Ring Algorithm
- Lamport's Algorithm
- NTP
- Berkeley Algorithm
Question 215 : Which system call returns the process identifier of a terminated child?
- wait
- exit
- fork
- get
Question 216 : Which are the two complementary deadlock-prevention schemes using timestamps?
- The wait-die & wound-wait scheme
- The wait-n-watch scheme
- The wound-wait scheme
- The wait-wound & wound-wait scheme
Question 217 : What is true about "No a priori knowledge about the processes " ?
- Process assignment decisions should be dynamic i.e based on the current load of the system and not on some static policy
- Heuristic methods requiring less computational efforts
- Algorithms provide near optimal system performance with a minimum overhead
- Scheduling algorithms that operate based on the information about the chracteristics and resource requirements of the processes
Question 218 : In the token passing approach of distributed systems, processes are organized in a ring structure _____
- logically
- physically
- both logically and physically
- Conceptually
Question 219 : What are the characteristics of transaction semantics ?
- Suitable for applications that are concerned about coherence of data
- The users of this model are interested in the atomicity property for their transaction
- Easy to implement in a single processor system
- Write-back enhances access performance
Question 220 : _________ is an object acting as a gateway for the client side.
- skeleton
- stub
- remote
- server
Question 221 : The basic idea of RMI is to
- Call an method on remote machine while hiding message passing to programmer.
- Call a method on remote machine while not hiding message passing to programmer.
- Call a method on the same machine while hiding message passing to programmer.
- Call a method on the same machine.
Question 222 : storage of firmware is -
- ROM
- RAM
- External
- Cache memory
Question 223 : The segment of code in which the process may change common variables, update tables, write into files is known as ____________
- program
- critical section
- non – critical section
- synchronizing
Question 224 : Which of the following allocates/deallocates buffers
- RRL
- Stub/skeleton layer
- Transport layer
- Networking layer
Question 225 : In distributed information systems ______ is responssible for executing several transactions concurrently over the network without any conflict.
- Enterprise application integration
- Transaction processing system
- Computational Grid
- Collaborative Grid
Question 226 : A request, at the risk of server duplicating execution is _________.
- Never Reissue
- Always Reissue
- Reissue a request on acknoledgment
- Reissue a request on no acknoledgment
Question 227 : Election message is always sent to the process with _______
- Lower numbers
- Waiting processes
- Higher numbers
- Requesting Lower number of resources
Question 228 : The V-system in distributed computing system is based on ______.
- Workstation model
- Workstation -server model
- Processor-pool model
- Client-server model
Question 229 : Lamport’s algorithm is used for __________synchronization
- Deadlock
- Physical Clock
- Logical Clock
- Election process
Question 230 : In RPC, _________________ handles transmission of messages across the network between client and the server machine
- Rpc transmission
- Rpc runtime
- Rpc communication
- Rpc interface
Question 231 : Which layer is the layer closest to the transmission medium ?
- Physical
- Data link
- Network
- Transport
Question 232 : No special machines manage the network of architecture in which resources are known as
- Peer-to-Peer
- Space based
- Tightly coupled
- Loosely coupled
Question 233 : Select correct option for the message(Mi) transmission case "Mi must be delivered before mj if Ti < Tj
- Absolute Ordering
- Consistent Ordering
- Causal Ordering
- total ordering
Question 234 : What is DGC?
- Distributed Garbage Collection
- Digital Garbage Collection
- Distributed Garbage Connection
- Digital Garbage Connection
Question 235 : In global google sysytem The user can expect query result in
- 0.7 seconds
- 0.4 seconds
- 0.2 seconds
- 0.8 seconds
Question 236 : RPC allows a computer program to cause a subroutine to execute in _________
- Its own address space
- Another address space
- Both its own address space and another address space
- Applications address space
Question 237 : What are the advantages of file replication?
- Improves availability & performance
- Decreases performance
- Decreases availability
- Increases Cost
Question 238 : The difference between logical and physical clocks ?
- Logical clocks measure the time of day and Physical clocks are used to mark relationships among events in a distributed system.
- Both are the same
- Physical clocks measure the time of day and Logical clocks are used to mark relationships among events in a distributed system.
- Physical clock and logical clock do not work in distributed system
Question 239 : Which type of service is not provided by Distributed File System
- Storage Service
- True File Service
- Name Service
- False File Service
Question 240 : ______hides differences in data representation and the way an object can be accessed
- Location transparency
- Access transparency
- Migration transparency
- Replication transparency
Question 241 : A relative name defines a path from the _________ context to the specified object.
- root
- current
- absolute
- relative
Question 242 : IP packet is encapsulated in a
- data link layer
- physical layer
- network layer
- transport layer
Question 243 : Hide differences in data representation and how a resource is accessed” which type of transparency is this?
- Relocation
- Failure
- Concurrency
- Access
Question 244 : Select which state is true for the Distributed File System i) is simply a classical model of a file system distributed across multiple machines. The purpose is to promote sharing of dispersed files. ii)A file system provides a service for clients. The server interface is the normal set of file operations: create, read, etc. on files.iii)The resources on a particular machine are local to itself. Resources on other machines are remote.
- i and ii only
- i ,ii,and iii
- ii and iii only
- i and iii only
Question 245 : Hide the failure and recovery of a resource is known as which transparency
- Failure
- Location
- Migration
- Relocation
Question 246 : Which of the following is not Message Ordering Multicast
- Unordered multicasts
- FIFO-ordered multicasts
- Causally-ordered multicasts
- LIFO-ordered multicasts
Question 247 : Time interval from a request send to its critical region execution completed is called ________.
- System throughput
- Message complexity
- Synchronization delay
- Response time
Question 248 : Which one of the following file system hides the location where in the network the file is stored?
- hidden distributed file system
- transparent distributed file system
- escaped distribution file system
- spy distributed file system
Question 249 : Staleness deviations relate to the ______________
- first time a replica was updated
- first time a replica was not updated
- last time a replica was updated
- last time a replica was not updated
Question 250 : The ___________ operating system is specifically designed for heterogeneous multicomputer system, where multiple hardware and network platforms are supported.
- distributed
- network
- middleware
- hybrid