Revision B

True/False: Operating system provide services such as user interface, program execution, I/O operations, file-system manipulation, communications and error detection.

• True
• False

Below are the additional functions exist to ensure an efficient system operations, EXCEPT:

• Resource allocation
• Accounting
• Protection and security
• Connect major computer components

Generally, system calls available as _________ - language instructions.

• assembly
• machine
• high-level
• object-oriented

True/False: Process control, File management, Device management, Information maintenance, Communications, and Protections are the types of system calls.

• True
• False

Based on the communication model in an operating system structure, communication may take place using either message passing or ___________.

• shared memory
• network
• high speed bus
• telephone line

In layered approach, the OS is divided into number of layers. The bottom layer (Layer 0) is the __________; the highest layer (Layer N) is the __________. 

• hardware, user interface
• user interface, hardware
• hardware, file system management
• user interface, device driver

Which of the following is not the advantages of layered approach operating system?

• Modularization makes debugging and verification much easier
• Design and implementation is simplified
• The careful definition and interaction of the layers
• Each layer hides certain data structure, operations and hardware details from higher-level layers

Microkernel contains __________ operation systems functions.

• essential core
• additional
• existing
• essential core and additional

Below are the explaination on the benefits of a microkernel organization, EXCEPT

• Extensibility - Allows addition of new services
• Flexibility - New features can be added and existing features can be subtracted
• Reliability - Can be vigorously tested
• Portability - Changes needed to port the system to a new system is changed in other services.

What is/are the goals to achieve when designing an operating system?

• A) User goals
• B) System goals
• A) and B)