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WorksheetsDistributed System QUIZ
Total questions: 70
Worksheet time: 1hrs 10mins
The Name of this type of cable is ..
Twisted Pair
Fiber
Coaxial
send information to all network devices in each connection..
Bridg
Swich
Hub
Type of Network topology
LAN
Ring
Star
Both B and C
Two events are called Concurrent, if
Time stamps are not equal
Time stamp are Equal
Time stamp are related
None of above
1. When single failure can cause an infinite number of failure, it is
Orphan message
Domino Effect
Livelock
None of these
Restore processes to previous error-free state is known as
Backward Recovery
Forward Recovery
Both A and B
None of these
When stored data cannot be access, it is known as
Communication failure
Secondary storage failure
System Failure
Process failure
A server halts, but is working correctly until it halts.
Crash Failure
Omission Failure
Timing Failure
Response Failure
Fault may be of
Transient Fault
Intermittent Fault
Permanent Fault
All of these
What is RMI stands for?
Remote Method Invocation
Random Method Innovation
Remote Mathematics Innovation
Random Mathematics Invocation
RMI uses a layered architecture; each of the layers could be enhanced or replaced without affecting the rest of the system.
True
False
RMI is a server-side component; It is not required to be deployed on the server.
True
False
Which program obtains a remote reference to one or more remote objects on a server and then invokes methods on them in an RMI application?
Server
Client
Not Client & Server
Client & Server
Which is a one-way communication only between the client and the server and it is not a reliable and there is no confirmation regarding reaching the message to the destination?
TCP
UDP
Both TCP & UDP
Not TCP & UDP
An RMI Server is responsible for
Creating an instance of the remote object
Exporting the remote object
Binding the instance of the remote object to the RMI registry
All mentioned above
identify the characteristics of processor in distributed system.
They vary in size and function
They are same in size and function
They are manufactured with single purpose
They are real-time devices
Identify the characteristics of process migration.
transfer data by entire file or immediate portion required
transfer the computation rather than the data
execute an entire process or parts of it at different sites
Computation will takes place for entire file
The file once created can not be changed is called
immutable file
mutex file
mutable file
none of the mentioned
In distributed systems, link and site failure is detected by
polling
handshaking
token passing
Message passing
When a distributed system is able to hide that a printer is being used concurrently by several users, what type of transparency does it provide?
Location transparency
Access transparency
Concurrency transparency
Replication transparency
Point out the wrong statement.
Abstraction enables the key benefit of cloud computing: shared, ubiquitous access
Virtualization assigns a logical name for a physical resource and then provides a pointer to that physical resource when a request is made
All cloud computing applications combine their resources into pools that can be assigned on demand to users
All of the mentioned
The ____________________may arise when a process rolls back to its checkpoint after a failure and requests all the other affected processes also to roll back
Rollback
Phantom Effect
Domino Effect
Livelock problem
The inter process communication between different nodes in Hadoop uses
REST API
RPC
RMI
IP Exchange
Number of message required in Ricart Agrawala Algorithm is?
3(N-1)
2(N-1)
3vN
N
Two events are called Concurrent, if
Time stamps are not equal
Time stamp are Equal
Time stamp are related
None of above
Number of message required in Suzuki Kasami algorithm is
3(N-1)
2(N-1)
0 or N
0 or (N-1)
Two events are called Casually Related, if
Time stamps are not equal
Time stamp are equal
Time stamp are related
None of the Above
In Suzuki Kasmi, When site Si receives a REQUEST(j, n) message, it sets
RNi [j]:= max(RNi [j], n)
RNi [j]:= Min(RNi [j], n)
RNi [j]:= Avg(RNi [j], n)
None of these
The response time is equivalent to
Synchronization Delay + response time
2(Synchronization delay) + Response time
Synchronization delay+ response time/2
None of these
A ---------- message from site Si to site Sj indicates that Si cannot grant Sj ’s request because it has currently granted permission to a site with a higher priority request
Failed
Yield
Enquire
Require
Which of the following is not the approach of deadlock detection
Centralized approach
Distributed approach
Token based approach
Hierarchical approach
The time to execute each step of a process has known upper and lower bounds
Asynchronous
synchronous
Late Response
None of these
1. In the above diagram what we conclude about e11 and e21
e11 || e21
e11=e21
e11≠ e21
None of these
In the diagram conclude about e22 and e13
e13-->e22
e22-->e13
e13=e22
e13≠ e22
25: Utilization rate of resources in an execution model is known to be its
A. Adaptation
B. Efficiency
C. Dependability
D. Flexibility
A server fails to respond to incoming requests
Crash Failure
Omission Failure
Timing Failure
Response Failure
perform operation and, if needs be, perform it again is
Time redundancy
Redundancy
Information Redundancy
None of these
Machines from different subnets cannot communicate
Process Failure
Machine Failure
Network Failure
None of these
bringing back the failed node in step with other nodes in the system is called
Recovery
Fault Tolerance
Masking Failure
None of these
Restore processes to previous error-free state is known as
Backward Recovery
Forward Recovery
Both A and B
None of these
Domino effect is the cause of
Orphan Message
Livelock
Lost message
failed message
2.The capability of a system to adapt the increased service load is called __________
a) scalability
b) tolerance
c) capacity
d) none of the mentioned
3. If one site fails in distributed system then ___________
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
4.Distributed systems should?
(A) high security
(B) have better resource sharing
(C) better system utilization
(D) low system overhead
5.The characteristics of a distributed system are :
(A) Resource sharing, heterogeneity, openness, security
(B) Scalability, fault handling
(C) Concurrency, transparency
(D) ALL are acceptable answers
6.What are design issues in distributed system structure ?
(A) Scalability
(B) Fault-tolerance
(C) Flexibility
(D) All of the mentioned
7.All the resources are shared and integrated within one OS, in the computing paradigm named _________
(A) Distributed computing
(B) Centralized computing
(C) Cloud computing
(D) Parallel computing
8.set of highly integrated machines that run the same process in parallel is known to be ___________
(A) Space based
(B) Loosely coupled
(C) Tightly coupled
(D) Peer-to-Peer
9.Which amongst the following is not an advantage of Distributed systems?
(A) Resource sharing
(B) Incremental growth
(C) Reliability
(D) None of the above
10.What type of fault remains in the system for some period and then disappears?
a) Permanent
b) Transient
c) Intermittent
d) All of the mentioned
11.All fault-tolerant techniques rely on
a) Integrity
b) Dependability
c) Redundancy
d) None of the mentioned
12.Which of the following Error Detection checks is not a part of Application detection?
a) Hardware checks
b) Timing checks
c) Reversal checks
d) Coding checks
13.Which of the following approaches are used to achieve reliable systems?
a) Fault prevention
b) Fault removal
c) Fault tolerance
d) All of the mentioned
14.RPC is a _________
a) synchronous operation
b) asynchronous operation
c) time independent operation
d) channel specific operation
15. RPC works between two processes. These processes must be ____________
a) on the same computer
b) on different computers connected with a network
c) on the same computer and also on different connected with a network
d) on none of the computers
16. A remote procedure call is _______
a) inter-process communication
b) a single process
c) a single thread
d) a single stream
17.An RPC (remote procedure call) is initiated by the _________
a) server
b) client
c) client after the sever
d) a third party
18.Which routing technique is used in a distributed system?
a) fixed routing
b) virtual routing
c) dynamic routing
d) all of the mentioned
20.Processes on the remote systems are identified by ___________
a) host ID
b) host name and identifier
c) identifier
d) process ID
The file once created can not be changed is called
immutable file
mutex file
mutable file
none of the mentioned
In distributed systems, link and site failure is detected by
polling
handshaking
token passing
Message passing
Specify the routing technique is used in distributed system.
fixed routing
virtual routing
dynamic routing
all of the mentioned
1. How does the hardware or software components located at networked computers communicate and coordinate their actions in a distributed system?
Using a global clock
Passing messages
-------------------- is a running program on a networked computer that accepts requests from programs running on other computers to perform a service and responds appropriately.
(a)
-------------------- is used to protect an intranet by preventing unauthorized messages from leaving or entering the network.
(a)
RMI stands for?
a) Remote Mail Invocation
b) Remote Message Invocation
c) Remaining Method Invocation
d) Remote Method Invocation
The processes that send requests are called ---------
(a)
--------------- is a software layer that provides a programming abstraction as well as masking the heterogeneity of the underlying networks, hardware, operating systems and programming languages
(a)
The main motivation for constructing distributed systems is -------------
(a)
