Deck 16: I/O Devices and Cloud Computing: Structure, Architecture, and Service Models

Question 1

The usual BUS structure used to connect the I/O devices is __________

A)star bus structure
B)multiple bus structure
C)single bus structure
D)node to node bus structure

Answer 1

single bus structure

Question 2

In intel's IA-32 architecture there is a separate 16 bit address space for the I/O devices.

A)false
B)true

Answer 2

true

Question 3

The advantage of I/O mapped devices to memory mapped is __________

A)the former offers faster transfer of data
B)the devices connected using i/o mapping have a bigger buffer space
C)the devices have to deal with fewer address lines
D)no advantage as such

Answer 3

the devices have to deal with fewer address lines

Question 4

The system is notified of a read or write operation by __________

A)appending an extra bit of the address
B)enabling the read or write bits of the devices
C)raising an appropriate interrupt signal
D)sending a special signal along the bus

Question 5

To overcome the lag in the operating speeds of the I/O device and the processor we use __________

A)buffer spaces
B)status flags
C)interrupt signals
D)exceptions

Question 6

The method of synchronising the processor with the I/O device in which the device sends a signal when it is ready is?

A)exceptions
B)signal handling
C)interrupts
D)dma

Question 7

The method which offers higher speeds of I/O transfers is __________

A)interrupts
B)memory mapping
C)program-controlled i/o
D)dma

Question 8

The process wherein the processor constantly checks the status flags is called as

A)polling
B)inspection
C)reviewing
D)echoing

Question 9

Which of the following is incorrect?

A)a layered-style program is divided into an array of modules or layers
B)each layer provides services to the layer "below" and makes use of services provided by the layer "above"
C)all of the mentioned
D)none of the mentioned

Question 10

What is Relaxed Layered Style?

A)each layer can be constrained to use only the layer directly below it
B)sometimes this constraint is relaxed slightly to allow each layer to use all the layers below it
C)all of the mentioned
D)none of the mentioned

Question 11

Which of the following is correct?

A)module a uses module b if a correct version of b must be present for a to execute correctly
B)module a calls (or invokes ) module b if b triggers execution of a
C)all of the mentioned
D)none of the mentioned

Question 12

Which of the following is true with respect to layered architecture?

A)each layer is allowed to depend on the layer above it being present and correct
B)a layer may call other layers above and below it, as long as it uses them
C)all of the mentioned
D)none of the mentioned

Question 13

What is Onion diagram illustrates?

A)it illustrates the connection between the layers in communications protocols, such as the international standards organization open systems interconnection (iso osi) model,or the layers in user interface and windowing systems, such as the x window system
B)it often illustrates operating system layers, with the kernel at the core
C)all of the mentioned
D)none of the mentioned

Question 14

In particular, layers have which of the following characteristics?

A)layers are by definition highly cohesive, thus satisfying the principle of cohesion
B)layers doesn't support information hiding
C)layers are constrained to use only above layers
D)all of the mentioned

Question 15

What are the drawbacks for Layers?

A)it is often necessary to pass data through many layers, which can slow performance significantly
B)layers support information hiding
C)multi-layered programs can be hard to debug because operations tend to be implemented through a series of calls across layers
D)none of the mentioned

Question 16

Which of the following is correct?

A)layers are not strongly coupled to the layers above them
B)each layer is strongly coupled only to the layer immediately below it
C)overall layered-style architectures are loosely coupled
D)all of the mentioned

Question 17

Which of the following is one of the unique attributes of Cloud Computing?

A)utility type of delivery
B)elasticity
C)low barrier to entry
D)all of the mentioned

Question 18

Point out the correct statement.

A)service level agreements (slas) is small aspect of cloud computing
B)cloud computing does not have impact on software licensing
C)cloud computing presents new opportunities to users and developers
D)all of the mentioned

Question 19

Applications that work with cloud computing that have low margins and usually low risk are __________    

A)high touch
B)low touch
C)moderate touch
D)all of the mentioned

Question 20

A service that concentrates on hardware follows the ___________  as a Service model.

A)iaas
B)caas
C)paas
D)all of the mentioned

Question 21

Point out the wrong statement.

A)a cloud is defined as the combination of the infrastructure of a datacenter with the ability to provision hardware and software
B)high touch applications are best done on- premises
C)the google app engine follows iaas
D)none of the mentioned

Question 22

When you add a software stack, such as an operating system and applications to the service, the model shifts to_________model.

A)saas
B)paas
C)iaas
D)all of the mentioned

Question 23

Which of the following is the most refined and restrictive service model?

A)iaas
B)caas
C)paas
D)all of the mentioned

Question 24

_____________ is a pay-as-you-go model matches resources to need on an ongoing basis.

A)utility
B)elasticity
C)low barrier to entry
D)all of the mentioned

Question 25

_____________ feature allows you to optimize your system and capture all possible transactions.

A)scalability
B)reliability
C)elasticity
D)none of the mentioned