Robustness of Distributed Systems - Operating System Questions & Answers

1.

How many layers does Internet model ISO consists of?

   A.) Three
   B.) Five
   C.) Seven
   D.) Eight

Answer: Option 'C'

Seven

2.

Which layer is the layer closest to the transmission medium ?

   A.) Transport
   B.) Network
   C.) Data link
   D.) Physical

Answer: Option 'D'

Physical

3.

Which layer is responsible for The process-to-process delivery?

   A.) Physical
   B.) Application
   C.) Transport
   D.) Network

Answer: Option 'C'

​Transport

4.

Header are ______ when data packet moves from upper to the lower layers?

   A.) Modified
   B.) Removed
   C.) Added
   D.) All of the mentioned

Answer: Option 'C'

​Added

5.

Which layer lies between transport layer and data link layer?

   A.) Physical
   B.) Network
   C.) Application
   D.) Session

Answer: Option 'B'

​Network

6.

Which of the following is an application layer service?

   A.) Mail service
   B.) File transfer
   C.) Remote access
   D.) All of the mentioned

Answer: Option 'D'

All of the mentioned

7.

What are important step followed when recovery from failure happens?

   A.) Post repairing integration with main system should happen smoothly and gracefully
   B.) Upon link failure both parties at end must not be notified
   C.) Fault recovery system must me adjusted
   D.) Failures are logged systematically

Answer: Option 'A'

Post repairing integration with main system should happen smoothly and gracefully

8.

What are different ways distributed may suffer?

   A.) Failure of a link
   B.) Failure of a site
   C.) Loss of message
   D.) All of the mentioned

Answer: Option 'D'

All of the mentioned

9.

What are design issues in distributed system structure?

   A.) Scalability
   B.) Fault-tolerance
   C.) Clustering
   D.) All of the mentioned

Answer: Option 'D'

All of the mentioned

10.

In which OSI layer encryption and decryption happens?

   A.) Application
   B.) Presentation
   C.) Transport
   D.) Data Link

Answer: Option 'B'

​Presentation

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