Computer Distributed Computing (CDC) MCQ's




Question 451 :
Which of the following is not a benefit of open distributed system (ODS)

  1. Extensibility
  2. Interoperability
  3. Securability
  4. Portability
  

Question 452 :
Migrating some resources, Suspending the execution, migrating the process and then resuming is known as

  1. post Freezing
  2. Pre Transferring
  3. On demand Exchange
  4. Code migration
  

Question 453 :
Which of the following is NOT type of transparency

  1. Access transparency
  2. Location transparency
  3. Replication transparency
  4. Clock Synchronization Transparency
  

Question 454 :
When resources have multiple instances ________ is used for deadlock Avoidance.

  1. Bankers algorithm
  2. Resource Allocation Graph
  3. Semaphores
  4. All of these
  

Question 455 :
A type of middleware that allows for between the built-in applications and the real-time OS?

  1. Firmware
  2. Embedded Middleware
  3. Database middleware
  4. Portals
  

Question 456 :
Which is the following property of transaction ensures that once transaction commits, the changes are permanent

  1. Atomic
  2. Consistent
  3. Isolated
  4. Durable
  

Question 457 :
In HDFS file System, ________ NameNode is used when the Primary NameNode goes down.

  1. Rack
  2. Data
  3. Secondary
  4. primary
  

Question 458 :
The capability of a system to adapt the increased service load is called ___________

  1. tolerance
  2. capacity
  3. scalability
  4. heterogeneity
  

Question 459 :
Berkeley Algorithm is ________

  1. Passive Time Server Algorithm
  2. Active Time Server Algorithm
  3. both (a) and (b)
  4. None of the mentioned
  

Question 460 :
In distributed systems, a logical clock is associated with _____________

  1. each instruction
  2. each process
  3. each register
  4. none of the mentioned
  

Question 461 :
A sequentially consistent memory provides __________ semantics because all the processes sharing a memory location always see exactly the same contents stored in it.

  1. n-copy
  2. double copy
  3. one-copy/single-copy
  4. Three copy
  

Question 462 :
A ________ system enables a distributed system to behave like a virtual uniprocessor, even though the system operates on collection of machines

  1. DOS
  2. NOS
  3. Middleware
  4. Operating system
  

Question 463 :
Communication channels may suffer through

  1. protocol
  2. transport
  3. arbitrary failures
  4. reliable communication
  

Question 464 :
Which statement is false about Scheduling?

  1. It reduces the waiting time of each job
  2. It avoids deadlock
  3. It makes minimum utilization of resources.
  4. It reduces response time
  

Question 465 :
A semaphore is a shared integer variable that can not

  1. drop below zero
  2. be more than zero
  3. drop below one
  4. that cannot be more than one
  

Question 466 :
Hiding the complicacy of the system from user in distributed environment is known as _____.

  1. Heterogeneity
  2. Security
  3. Flexibility
  4. Transparency
  

Question 467 :
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 468 :
Which one is coordinator selection algorithm?

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

Question 469 :
Which of the following is/are the advantages of load balancing.i) It improves the system performanceii) Response time beomes longeriii) small jobs do not suffer from long starvation

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

Question 470 :
A problem with the ________ protocol is that when the coordinator has crashed, participants may not be able to reach a final decision.

  1. One-phase commit
  2. Three-phase commit
  3. Two-phase commit
  4. Virtual synchrony
  

Question 471 :
The capabiliy of a system to detcet - recover from failure is known as _____________________.

  1. fault tolerant - portable
  2. scalable - robust
  3. fault tolerant - robust
  4. potable - scalable
  

Question 472 :
Two types of replication

  1. homogenous and hetrogenous
  2. parallel and distributed
  3. Active and passive
  4. simple and complex
  

Question 473 :
Process of suspending execution at source and resuming at destination is known as_________.

  1. Freezing
  2. Suspension
  3. Distribution
  4. Migration
  

Question 474 :
Which of the following is NOT a Significant Consequence of Distributed Systems.

  1. Concurrency of components
  2. Lack of global clock
  3. Independent failures of components
  4. Scalability
  

Question 475 :
A system that offers intermediate-term storage capacity for messages, without requiring either the sender or receiver to be active during message transmission is suitable for

  1. Persistent asynchronous communication
  2. Transient asynchronous communication
  3. Persistent synchronous communication
  4. Transient synchronous communication
  

Question 476 :
The automounter maintains a table of....................... with a reference to one or more NFS servers listed against each.

  1. remote procedure call
  2. mount protocol
  3. Pathnames
  4. Lookup
  

Question 477 :
A 'glue' between client and server parts of application.

  1. Middleware
  2. Firmware
  3. Package
  4. System Software
  

Question 478 :
Select the correct sequence for process migration

  1. freezing the process- Transfer the process- forward the message- communicate between cooperating process
  2. Transfer the process- forward the message- communicate between cooperating process-freezing the process
  3. forward the message- communicate between cooperating process-freezing the process- Transfer the process
  4. communicate between cooperating process-freezing the process- Transfer the process- forward the message
  

Question 479 :
When a file appear to the file server as an ordered sequence of records then mention file model to which it belongs.

  1. Structured File Model
  2. Unstructured File Model
  3. Mutable File Model
  4. Immutable File Model
  

Question 480 :
What are the advantages of file replication ?

  1. Improves availability -performance
  2. Decreases performance
  3. They are consistent
  4. Improves speed
  
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