Deck 13: Embedded Operating Systems

Question 1

The TinyOS scheduler operates across all components.

Answer 1

True

Question 2

A spinlock should be used on a single-processor system.

Answer 2

False

Question 3

Configurability, direct use of interrupts, I/O device flexibility, and real-time operation are some of the unique characteristics and design requirements for __________ .

A) Tiny OS
B) eCos
C) embedded operating systems
D) OS service routines

Answer 3

C

Question 4

The Hardware Abstraction Layer is the same for each hardware platform.

Question 5

A mutex is used to enforce mutually exclusive access to a resource, allowing only one thread at a time to gain access.

Question 6

All functionality that is typically included in the kernel of an OS is included in the eCos kernel.

Question 7

Embedded software does not execute in response to external events.

Question 8

_________ is one of the most widely used embedded operating systems.

A) API
B) eCos
C) TinyOS
D) MQS

Question 9

General-purpose computer systems far outnumber embedded systems.

Question 10

Embedded systems can be part of a larger system or product.

Question 11

__________ refers to the use of electronics and software within a product.

A) TinyOS
B) General purpose computer
C) Embedded system
D) Desktop system

Question 12

The disadvantage of using a general-purpose OS is that it is not optimized for real-time and embedded applications.

Question 13

Typically, more complex embedded systems do not include an OS.

Question 14

Two examples of operating systems that have been designed from the ground up for embedded applications are TinyOS and _________ .

A) eCos
B) Linux
C) BSD
D) HAL

Question 15

A key design requirement for _________ is portability to different architectures and platforms with minimal effort.

A) HAL
B) TinyOS
C) GNU
D) eCos

Question 16

The eCos configuration tool runs on Windows or Linux.

Question 17

The bitmap scheduler is configured with 8, 16, or 32 priority levels.

Question 18

A simple embedded system, with simple functionality, may be controlled by a special-purpose program or set of programs with no other software.

Question 19

General-purpose operating systems typically permit any user process to use interrupts directly.

Question 20

An antilock braking system in a car is an example of an embedded system.

Question 21

__________ has become a popular approach to implementing wireless sensor network software.

A) eCos
B) TinyOS
C) Arbiter
D) Embedded system

Question 22

The _________ was designed to satisfy four main objectives: low interrupt latency, low task switching latency, small memory footprint, and deterministic behavior.

Question 23

The __________ interface allows the client to hold on to a resource until the client is notified that someone else needs the resource.

A) resource configure
B) resource requested
C) resource
D) resource-specific

Question 24

__________ are the clients of the driver.

A) DSRs
B) ISRs
C) Threads
D) I/O systems

Question 25

The __________ module contains the code necessary for processor startup, interrupt delivery, context switching, and other functionality specific to the instruction set architecture of that processor family.

A) Variant
B) Platform
C) Memory Management
D) Architecture

Question 26

The HAL is implemented as three separate modules: Architecture, Variant, and _________ .

Question 27

_________ in TinyOS may be tied either directly or indirectly to hardware events.

A) Commands
B) Tasks
C) Timers
D) Events

Question 28

The eCos _________ is used to configure an eCos package to run on a target embedded system.

Question 29

A __________ is a flag that a thread can check before executing a particular piece of code.

Question 30

The _________ is an open source, royalty-free, real-time OS intended for embedded applications.

Question 31

The _________ is software that presents a consistent API to the upper layers and maps upper-layer operations onto a specific hardware platform.

Question 32

A __________ is invoked in response to a hardware interrupt.

Question 33

Which of the following does NOT properly characterize eCos?

A) works best with predictable rather than real-time requirements
B) intended for embedded applications
C) open source
D) royalty free

Question 34

An __________ is a 32-bit word used as a synchronization mechanism.

Question 35

__________ are a combination of computer hardware and software designed to perform a dedicated function.

Question 36

The __________ module includes code for startup, chip selection configuration, interrupt controllers, and timer devices.

A) Architecture
B) Variant
C) MMU
D) Platform

Question 37

The eCos __________ is a framework for supporting device drivers.

A) standard C library
B) hardware abstraction layer
C) eCos kernel
D) I/O system

Question 38

Each _________ in a component is similar to a thread in an ordinary OS, with certain limitations.

A) kernel
B) command
C) event
D) task

Question 39

__________ are an eCos synchronization mechanism that provides a means for two threads to exchange information.

Question 40

Operate with limited resources, adapt to hardware evolution, support a wide range of applications, support a diverse set of platforms, and be robust are goals for __________ .

A) TinyOs
B) eCos
C) DSRs
D) ISRs

Question 41

The eCos kernel can be configured to provide one of two scheduler designs: a multilevel queue scheduler and the __________ .

Question 42

In TinyOS, __________ are nonblocking requests.

Question 43

The eCos kernel can be configured to support either a priority inheritance protocol or a _________ protocol.

Question 44

There are two general approaches to developing an embedded OS: take an existing OS and adapt it for the embedded application, and __________ .

Question 45

An eCos Deferred Service Routing (DSR) is invoked in response to a request by an __________ .