Distributed Computing MCQ

Question 201 : ____ is software architecture used to build a distributed system from a network connected by high speed network.

  1. DOS
  2. NOS
  3. Middleware
  4. 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

  1. Workstation model
  2. Workstation -server model
  3. Processor-pool model
  4. 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.

  1. extermination
  2. expiration
  3. reincarnation
  4. shut down the client

Question 204 : A data consistency model in which shared data are made consistent when a critical region is exited.

  1. Casual consistency
  2. Sequential consistency
  3. Release consistency
  4. Strict consistency

Question 205 : Virtualization that creates one single address space architecture is called ______.

  1. Loosely coupled
  2. Peer-to-Peer
  3. Space-based
  4. Tightly coupled

Question 206 : In distributed file system, when a file’s physical storage location changes

  1. file name need to be changed
  2. file name need not to be changed
  3. file’s host name need to be changed
  4. file’s local name need to be changed

Question 207 : A Parallel computer is the computer system capable of

  1. Parallel Computing
  2. Centralized Computing
  3. Decentralized Computing
  4. 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

  1. i only
  2. ii only
  3. ii and iii only
  4. i,ii and iii

Question 209 : The data sequence of information that is time-dependent is called ___________

  1. Stream of data
  2. traditional data
  3. transactional data
  4. spatial data

Question 210 : Mapping of network file system protocol to local file system is done by ____________

  1. network file system
  2. local file system
  3. volume manager
  4. 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 --------

  1. FIFO consistency
  2. LRU consistency
  3. Optimal consistency
  4. Casual consistency

Question 212 : A process is _________________

  1. program in main memory
  2. Program in cache memory
  3. program in secondary storage
  4. program in execution

Question 213 : Single coordinator approach has the following disadvantages : i.Simple implementation, ii.Simple deadlock handling, iii.Bottleneck

  1. i
  2. ii
  3. ii and iii
  4. iii

Question 214 : Which one is coordinator selection algorithm?

  1. Ring Algorithm
  2. Lamport's Algorithm
  3. NTP
  4. Berkeley Algorithm

Question 215 : Which system call returns the process identifier of a terminated child?

  1. wait
  2. exit
  3. fork
  4. get

Question 216 : Which are the two complementary deadlock-prevention schemes using timestamps?

  1. The wait-die & wound-wait scheme
  2. The wait-n-watch scheme
  3. The wound-wait scheme
  4. The wait-wound & wound-wait scheme

Question 217 : What is true about "No a priori knowledge about the processes " ?

  1. Process assignment decisions should be dynamic i.e based on the current load of the system and not on some static policy
  2. Heuristic methods requiring less computational efforts
  3. Algorithms provide near optimal system performance with a minimum overhead
  4. 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 _____

  1. logically
  2. physically
  3. both logically and physically
  4. Conceptually

Question 219 : What are the characteristics of transaction semantics ?

  1. Suitable for applications that are concerned about coherence of data
  2. The users of this model are interested in the atomicity property for their transaction
  3. Easy to implement in a single processor system
  4. Write-back enhances access performance

Question 220 : _________ is an object acting as a gateway for the client side.

  1. skeleton
  2. stub
  3. remote
  4. server

Question 221 : The basic idea of RMI is to

  1. Call an method on remote machine while hiding message passing to programmer.
  2. Call a method on remote machine while not hiding message passing to programmer.
  3. Call a method on the same machine while hiding message passing to programmer.
  4. Call a method on the same machine.

Question 222 : storage of firmware is -

  1. ROM
  2. RAM
  3. External
  4. Cache memory

Question 223 : The segment of code in which the process may change common variables, update tables, write into files is known as ____________

  1. program
  2. critical section
  3. non – critical section
  4. synchronizing

Question 224 : Which of the following allocates/deallocates buffers

  1. RRL
  2. Stub/skeleton layer
  3. Transport layer
  4. Networking layer

Question 225 : In distributed information systems ______ is responssible for executing several transactions concurrently over the network without any conflict.

  1. Enterprise application integration
  2. Transaction processing system
  3. Computational Grid
  4. Collaborative Grid

Question 226 : A request, at the risk of server duplicating execution is _________.

  1. Never Reissue
  2. Always Reissue
  3. Reissue a request on acknoledgment
  4. Reissue a request on no acknoledgment

Question 227 : Election message is always sent to the process with _______

  1. Lower numbers
  2. Waiting processes
  3. Higher numbers
  4. Requesting Lower number of resources

Question 228 : The V-system in distributed computing system is based on ______.

  1. Workstation model
  2. Workstation -server model
  3. Processor-pool model
  4. Client-server model

Question 229 : Lamport’s algorithm is used for __________synchronization

  1. Deadlock
  2. Physical Clock
  3. Logical Clock
  4. Election process

Question 230 : In RPC, _________________ handles transmission of messages across the network between client and the server machine

  1. Rpc transmission
  2. Rpc runtime
  3. Rpc communication
  4. Rpc interface

Question 231 : Which layer is the layer closest to the transmission medium ?

  1. Physical
  2. Data link
  3. Network
  4. Transport

Question 232 : No special machines manage the network of architecture in which resources are known as

  1. Peer-to-Peer
  2. Space based
  3. Tightly coupled
  4. Loosely coupled

Question 233 : Select correct option for the message(Mi) transmission case "Mi must be delivered before mj if Ti < Tj

  1. Absolute Ordering
  2. Consistent Ordering
  3. Causal Ordering
  4. total ordering

Question 234 : What is DGC?

  1. Distributed Garbage Collection
  2. Digital Garbage Collection
  3. Distributed Garbage Connection
  4. Digital Garbage Connection

Question 235 : In global google sysytem The user can expect query result in

  1. 0.7 seconds
  2. 0.4 seconds
  3. 0.2 seconds
  4. 0.8 seconds

Question 236 : RPC allows a computer program to cause a subroutine to execute in _________

  1. Its own address space
  2. Another address space
  3. Both its own address space and another address space
  4. Applications address space

Question 237 : What are the advantages of file replication?

  1. Improves availability & performance
  2. Decreases performance
  3. Decreases availability
  4. Increases Cost

Question 238 : The difference between logical and physical clocks ?

  1. Logical clocks measure the time of day and Physical clocks are used to mark relationships among events in a distributed system.
  2. Both are the same
  3. Physical clocks measure the time of day and Logical clocks are used to mark relationships among events in a distributed system.
  4. Physical clock and logical clock do not work in distributed system

Question 239 : Which type of service is not provided by Distributed File System

  1. Storage Service
  2. True File Service
  3. Name Service
  4. False File Service

Question 240 : ______hides differences in data representation and the way an object can be accessed

  1. Location transparency
  2. Access transparency
  3. Migration transparency
  4. Replication transparency

Question 241 : A relative name defines a path from the _________ context to the specified object.

  1. root
  2. current
  3. absolute
  4. relative

Question 242 : IP packet is encapsulated in a

  1. data link layer
  2. physical layer
  3. network layer
  4. transport layer

Question 243 : Hide differences in data representation and how a resource is accessed” which type of transparency is this?

  1. Relocation
  2. Failure
  3. Concurrency
  4. 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.

  1. i and ii only
  2. i ,ii,and iii
  3. ii and iii only
  4. i and iii only

Question 245 : Hide the failure and recovery of a resource is known as which transparency

  1. Failure
  2. Location
  3. Migration
  4. Relocation

Question 246 : Which of the following is not Message Ordering Multicast

  1. Unordered multicasts
  2. FIFO-ordered multicasts
  3. Causally-ordered multicasts
  4. LIFO-ordered multicasts

Question 247 : Time interval from a request send to its critical region execution completed is called ________.

  1. System throughput
  2. Message complexity
  3. Synchronization delay
  4. Response time

Question 248 : Which one of the following file system hides the location where in the network the file is stored?

  1. hidden distributed file system
  2. transparent distributed file system
  3. escaped distribution file system
  4. spy distributed file system

Question 249 : Staleness deviations relate to the ______________

  1. first time a replica was updated
  2. first time a replica was not updated
  3. last time a replica was updated
  4. 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.

  1. distributed
  2. network
  3. middleware
  4. hybrid