Exam 13: Embedded Operating Systems

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

__________ are the clients of the driver.

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

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

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

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

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

The TinyOS scheduler operates across all components.

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

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

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

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

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

In TinyOS, __________ are nonblocking requests.

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

Embedded software does not execute in response to external events.

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

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

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.

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