Module 2 - Questions and Answers on Distributed Communication

Question 1

Remote Procedure Calls are used :

Accepted Answer

for communication between two processes on separate systems

Answer

for communication between two processes remotely different from each other on the same system

Answer

for communication between two processes on the same system

Answer

none of the above

Question 2

To differentiate the many network services a system supports ______ are used.

Accepted Answer

Ports

Answer

Variables

Answer

Sockets

Answer

Service names

Question 3

RPC provides a(an) _____ on the client side, a separate one for each remote procedure.

Accepted Answer

stub

Answer

identifier

Answer

name

Answer

process identifier

Question 4

The stub :

Accepted Answer

all of the above

Answer

transmits the message to the server where the server side stub receives the message and invokes procedure on the server side

Answer

packs the parameters into a form transmittable over the network

Answer

locates the port on the server

Question 5

To resolve the problem of data representation on different systems RPCs define _____________

Accepted Answer

machine-independent representation of data

Answer

machine dependent representation of data

Answer

machine representation of data

Answer

none of the above

Question 6

The full form of RMI :

Accepted Answer

Remote Method Invocation

Answer

Remote Memory Installation

Answer

Remote Memory Invocation

Answer

Remote Method Installation

Question 7

The remote method invocation :

Accepted Answer

allows a thread to invoke a method on a remote object

Answer

allows a process to invoke memory on a remote object

Answer

allows a thread to invoke memory on a remote object

Answer

allows a process to invoke a method on a remote object

Question 8

A process that is based on IPC mechanism which executes on different systems and can communicate with other processes using message based communication, is called ________

Accepted Answer

Remote Procedure Call

Answer

Local Procedure Call

Answer

Inter Process Communication

Answer

Remote Machine Invocation

Question 9

The initial program that is run when the computer is powered up is called :

Accepted Answer

bootstrap program

Answer

boot program

Answer

bootloader

Answer

initializer

Question 10

How does the software trigger an interrupt ?

Accepted Answer

Executing a special operation called system call

Answer

Sending signals to CPU through bus

Answer

Executing a special program called system program

Answer

Executing a special program call, an interrupt trigger program

Question 11

What is a trap/exception ?

Accepted Answer

software generated interrupt caused by an error

Answer

hardware generated interrupt caused by an error

Answer

user generated interrupt caused by an error

Answer

none of the above

Question 12

What is an ISR ?

Accepted Answer

Interrupt Service Routine

Answer

Information Service Request

Answer

Interrupt Service Request

Answer

Information Service Routine

Question 13

An interrupt vector

Accepted Answer

is an address that is indexed to an interrupt handler

Answer

is a unique device number that is indexed by an address

Answer

is a unique identity given to an interrupt

Answer

none of the mentioned

Question 14

DMA is used for :

Accepted Answer

High speed devices(disks and communications network)

Answer

Low speed devices

Answer

Utilizing CPU cycles

Answer

All of the Above

Question 15

In a memory mapped input/output (PIO) :

Accepted Answer

the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available

Answer

the CPU uses polling to watch the control bit constantly, looping to see if device is ready

Answer

the CPU receives an interrupt when the device is ready for the next byte

Answer

the CPU runs a user written code and does accordingly

Question 16

In an interrupt driven input/output :

Accepted Answer

the CPU receives an interrupt when the device is ready for the next byte

Answer

the CPU uses polling to watch the control bit constantly, looping to see if device is ready

Answer

the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available

Answer

the CPU runs a user written code and does accordingly

Question 17

In the layered approach of Operating Systems :

Accepted Answer

Highest Layer(N) is the User interface

Answer

Bottom Layer(0) is the User interface

Answer

Bottom Layer(N) is the hardware

Answer

Highest Layer(N) is the hardware

Question 18

How does the Hardware trigger an interrupt ?

Accepted Answer

Sending signals to CPU through system bus

Answer

Executing a special program called interrupt program

Answer

Executing a special program called system program

Answer

Executing a special operation called system call

Question 19

Which operation is performed by an interrupt handler ?

Accepted Answer

All of the Above

Answer

Saving the current state of the system

Answer

Loading the interrupt handling code and executing it

Answer

Once done handling, bringing back the system to the original state it was before the interrupt occurred

Module 2 - Questions and Answers on Distributed Communication

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