Foram encontradas 1.140 questões.
- Fundamentos de Sistemas OperacionaisArquitetura de Sistemas Operacionais
- Fundamentos de Sistemas OperacionaisClassificação de Sistemas Operacionais
- Fundamentos de Sistemas OperacionaisSistemas Monoprogramáveis
No que se refere a sistema operacional, julgue o item a seguir.
O Unix é um sistema operacional monoprocessado, o que garante maior controle de acesso e, consequentemente, maior segurança.
Provas
Questão presente nas seguintes provas
No que se refere a sistema operacional, julgue o item a seguir.
Kernel é o núcleo do sistema operacional encarregado de controlar o acesso à memória de demais componentes de hardware, gerenciar os programas abertos, dividir o tempo de processador entre eles. É a base sobre a qual rodam as demais partes do sistema operacional, drives de dispositivo e programas.
Provas
Questão presente nas seguintes provas
- Fundamentos de Sistemas OperacionaisArquitetura de Sistemas Operacionais
- Fundamentos de Sistemas OperacionaisClassificação de Sistemas Operacionais
No que se refere a sistema operacional, julgue o item a seguir.
Sistema operacional fortemente acoplado é um sistema que tem capacidade avançada de segurança.
Provas
Questão presente nas seguintes provas
- Fundamentos de Sistemas OperacionaisInterrupções de Hardware e Sinais
- Fundamentos de Sistemas OperacionaisSistemas Multiusuário/Multiprogramáveis
- Gerenciamento de ProcessosComunicação entre Processos (IPC)
No que se refere a sistema operacional, julgue o item a seguir.
Para ocultar os efeitos das interrupções, os sistemas operacionais fornecem um modelo conceitual que consiste em processos sequenciais que são executados em paralelo. Os processos podem comunicar-se uns com os outros, utilizando primitivas de comunicação interprocesso, como semáforos, monitores e mensagens.
Provas
Questão presente nas seguintes provas
No que se refere a sistema operacional, julgue o item a seguir.
Os sistemas operacionais podem ser vistos de dois pontos de vista: gerenciadores de recursos e máquinas estendidas. Na visão de máquina estendida, o objetivo está relacionado à possibilidade de compartilhamento de disco em uma rede.
Provas
Questão presente nas seguintes provas
Off the radar screen
Days after Air France’s ill-fated Airbus A330 plunged mysteriously into the southern Atlantic Ocean four hours after leaving Rio de Janeiro for Paris on May 31st, rescuers were still searching for debris.
The wreckage is thought to lie up to some 3,700 metres below the waves, possibly in one of the many trenches that riddle the rocky undersea mountain range west of the Mid-Atlantic Ridge. Its exact location may not be known for several weeks.
One of the hazards of flying over oceans is the lack of radar coverage. Even the latest radar equipment can reach out no more than 550 kilometres (300 nautical miles) from land. Once out of radar range, pilots flying intercontinental routes make scheduled radio contact every half an hour or so with air-traffic control stations, behind or ahead of them, to report their positions. The rest of the time, no one knows exactly where they are.
A number of countries, especially those surrounded by oceans or by vast expanses of rugged wilderness are none too happy with this. America, Australia and Canada have been among the most active proponents of satellite navigation for commercial aircraft.
The Canadian authorities began operation of such a system in January. It uses what is known in aviation circles as ADS-B, short for automatic dependent surveillance-broadcast. The technology combines the precise position of the aircraft, as identified by global-positioning satellites, with data about its flight number, speed, direction and attitude (whether it is climbing, descending or turning).
Although ADS-B would not have prevented the crash into the Atlantic Ocean, it might well have helped locate the debris more quickly. Knowing the exact location of the accident would allow rescue craft to be on the scene within hours, pulling any survivors from the water. That too would be a great benefit of the new air-traffic-control technology.
Internet: <www.economist.com> (adapted).
Judge the following item about the ideas and the linguistic structures of the text above.
The wreckage exact location is already known.
Provas
Questão presente nas seguintes provas
Off the radar screen
Days after Air France’s ill-fated Airbus A330 plunged mysteriously into the southern Atlantic Ocean four hours after leaving Rio de Janeiro for Paris on May 31st, rescuers were still searching for debris.
The wreckage is thought to lie up to some 3,700 metres below the waves, possibly in one of the many trenches that riddle the rocky undersea mountain range west of the Mid-Atlantic Ridge. Its exact location may not be known for several weeks.
One of the hazards of flying over oceans is the lack of radar coverage. Even the latest radar equipment can reach out no more than 550 kilometres (300 nautical miles) from land. Once out of radar range, pilots flying intercontinental routes make scheduled radio contact every half an hour or so with air-traffic control stations, behind or ahead of them, to report their positions. The rest of the time, no one knows exactly where they are.
A number of countries, especially those surrounded by oceans or by vast expanses of rugged wilderness are none too happy with this. America, Australia and Canada have been among the most active proponents of satellite navigation for commercial aircraft.
The Canadian authorities began operation of such a system in January. It uses what is known in aviation circles as ADS-B, short for automatic dependent surveillance-broadcast. The technology combines the precise position of the aircraft, as identified by global-positioning satellites, with data about its flight number, speed, direction and attitude (whether it is climbing, descending or turning).
Although ADS-B would not have prevented the crash into the Atlantic Ocean, it might well have helped locate the debris more quickly. Knowing the exact location of the accident would allow rescue craft to be on the scene within hours, pulling any survivors from the water. That too would be a great benefit of the new air-traffic-control technology.
Internet: <www.economist.com> (adapted).
Judge the following item about the ideas and the linguistic structures of the text above.
The word “wreckage” refers to the remaining parts of something that has been wrecked.
Provas
Questão presente nas seguintes provas
- Fundamentos de Sistemas OperacionaisKernelFunções do Kernel
- Fundamentos de Sistemas OperacionaisGerenciamento de Recursos de Hardware
- Fundamentos de Sistemas OperacionaisIntrodução a Sistemas Operacionais
No que se refere a sistema operacional, julgue o item a seguir.
Oferecer alocação ordenada e controlada dos processadores, das memórias e dos dispositivos de entrada e de saída entre os vários programas que competem por eles é tarefa do sistema operacional.
Provas
Questão presente nas seguintes provas
Off the radar screen
Days after Air France’s ill-fated Airbus A330 plunged mysteriously into the southern Atlantic Ocean four hours after leaving Rio de Janeiro for Paris on May 31st, rescuers were still searching for debris.
The wreckage is thought to lie up to some 3,700 metres below the waves, possibly in one of the many trenches that riddle the rocky undersea mountain range west of the Mid-Atlantic Ridge. Its exact location may not be known for several weeks.
One of the hazards of flying over oceans is the lack of radar coverage. Even the latest radar equipment can reach out no more than 550 kilometres (300 nautical miles) from land. Once out of radar range, pilots flying intercontinental routes make scheduled radio contact every half an hour or so with air-traffic control stations, behind or ahead of them, to report their positions. The rest of the time, no one knows exactly where they are.
A number of countries, especially those surrounded by oceans or by vast expanses of rugged wilderness are none too happy with this. America, Australia and Canada have been among the most active proponents of satellite navigation for commercial aircraft.
The Canadian authorities began operation of such a system in January. It uses what is known in aviation circles as ADS-B, short for automatic dependent surveillance-broadcast. The technology combines the precise position of the aircraft, as identified by global-positioning satellites, with data about its flight number, speed, direction and attitude (whether it is climbing, descending or turning).
Although ADS-B would not have prevented the crash into the Atlantic Ocean, it might well have helped locate the debris more quickly. Knowing the exact location of the accident would allow rescue craft to be on the scene within hours, pulling any survivors from the water. That too would be a great benefit of the new air-traffic-control technology.
Internet: <www.economist.com> (adapted).
Judge the following item about the ideas and the linguistic structures of the text above.
The verb to plunge in “Airbus A330 plunged mysteriously into the southern Atlantic Ocean” means to thrust or throw (something or oneself) forcibly or suddenly downwards.
Provas
Questão presente nas seguintes provas
Off the radar screen
Days after Air France’s ill-fated Airbus A330 plunged mysteriously into the southern Atlantic Ocean four hours after leaving Rio de Janeiro for Paris on May 31st, rescuers were still searching for debris.
The wreckage is thought to lie up to some 3,700 metres below the waves, possibly in one of the many trenches that riddle the rocky undersea mountain range west of the Mid-Atlantic Ridge. Its exact location may not be known for several weeks.
One of the hazards of flying over oceans is the lack of radar coverage. Even the latest radar equipment can reach out no more than 550 kilometres (300 nautical miles) from land. Once out of radar range, pilots flying intercontinental routes make scheduled radio contact every half an hour or so with air-traffic control stations, behind or ahead of them, to report their positions. The rest of the time, no one knows exactly where they are.
A number of countries, especially those surrounded by oceans or by vast expanses of rugged wilderness are none too happy with this. America, Australia and Canada have been among the most active proponents of satellite navigation for commercial aircraft.
The Canadian authorities began operation of such a system in January. It uses what is known in aviation circles as ADS-B, short for automatic dependent surveillance-broadcast. The technology combines the precise position of the aircraft, as identified by global-positioning satellites, with data about its flight number, speed, direction and attitude (whether it is climbing, descending or turning).
Although ADS-B would not have prevented the crash into the Atlantic Ocean, it might well have helped locate the debris more quickly. Knowing the exact location of the accident would allow rescue craft to be on the scene within hours, pulling any survivors from the water. That too would be a great benefit of the new air-traffic-control technology.
Internet: <www.economist.com> (adapted).
Judge the following item about the ideas and the linguistic structures of the text above.
The word “ill-fated” is synonymous with doomed.
Provas
Questão presente nas seguintes provas
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