Foram encontradas 70 questões.
- Banco de Dados RelacionalTransaçõesControle de Concorrência
- Banco de Dados RelacionalTransaçõesLockingBloqueio Compartilhado
- Banco de Dados RelacionalTransaçõesLockingBloqueio Exclusivo
Em um Sistema Gerenciador de Banco de Dados (SGBD)
relacional, a gerência de bloqueios é crucial para manter
a consistência e a integridade dos dados durante o acesso concorrente por várias transações. Existem diversos
níveis e tipos de bloqueio, e eles estão associados ao propósito do bloqueio.
A respeito desses diversos níveis e tipos de bloqueio, constata-se que o
A respeito desses diversos níveis e tipos de bloqueio, constata-se que o
Provas
Questão presente nas seguintes provas
O princípio de independência de dados é um conceito
fundamental no modelo relacional de bancos de dados.
A aplicação prática deste princípio permite que os bancos
de dados sejam gerenciados, otimizados e modificados
eficientemente sem a necessidade de realizar modificações extensivas em cada aplicação ou consulta que utiliza
o banco de dados, facilitando a manutenção e a evolução
dos sistemas.
Na arquitetura de referência ANSI/SPARC, que é composta por três níveis de esquema — externo, conceitual (ou lógico) e interno —, o princípio de independência de dados é expresso por meio da
Na arquitetura de referência ANSI/SPARC, que é composta por três níveis de esquema — externo, conceitual (ou lógico) e interno —, o princípio de independência de dados é expresso por meio da
Provas
Questão presente nas seguintes provas
Gatilhos (triggers) e procedimentos armazenados (stored
procedures) são componentes fundamentais em sistemas
de gerenciamento de banco de dados (SGBDs) relacionais. Tanto os gatilhos quanto os procedimentos armazenados desempenham papéis vitais e, muitas vezes, complementares em aplicações baseadas em banco de dados
relacionais, sendo escolhidos de acordo com as necessidades específicas de uma aplicação ou de um sistema.
A respeito de gatilhos e de procedimentos armazenados, tem-se que
A respeito de gatilhos e de procedimentos armazenados, tem-se que
Provas
Questão presente nas seguintes provas
Suponha que o esquema de um banco de dados relacional tenha sido obtido a partir de um modelo E-R em que duas entidades, A e B, estão relacionadas por meio de uma relação R. A regra aplicada para a transformação de R foi a fusão das tabelas correspondentes às entidades A e B, que deu origem à tabela TR. A chave primária da tabela TR é a mesma que foi originalmente definida para a tabela relativa à entidade A.
Qual diagrama define uma relação R compatível com a transformação descrita acima?
Provas
Questão presente nas seguintes provas
3001510
Ano: 2023
Disciplina: TI - Desenvolvimento de Sistemas
Banca: CESGRANRIO
Orgão: Transpetro
Disciplina: TI - Desenvolvimento de Sistemas
Banca: CESGRANRIO
Orgão: Transpetro
Provas:
Estruturas de dados referem-se aos diferentes mecanismos de organização de dados para atender a diferentes
requisitos de processamento.
Dentre as estruturas de dados, é eficiente para inserção e remoção de elementos em qualquer posição, incluindo início, meio e fim, além de oferecer acesso aos elementos em posições intermediárias, a seguinte estrutura de dados:
Dentre as estruturas de dados, é eficiente para inserção e remoção de elementos em qualquer posição, incluindo início, meio e fim, além de oferecer acesso aos elementos em posições intermediárias, a seguinte estrutura de dados:
Provas
Questão presente nas seguintes provas
Durante o desenvolvimento de um banco de dados, é possível construir uma representação gráfica de uma estrutura de dados, ilustrando as entidades, seus atributos e os
relacionamentos entre elas.
Tal representação gráfica é a(o)
Tal representação gráfica é a(o)
Provas
Questão presente nas seguintes provas
- AdministraçãoAlta Disponibilidade
- AdministraçãoTolerância a Falhas
- Banco de Dados DistribuídoReplicação de Dados
É possível a um sistema de gerenciamento de banco de
dados (SGBD) fornecer acesso contínuo aos dados, mesmo em face de falhas de hardware, de software ou de
rede.
Essa capacidade é atingida ao implementar-se a seguinte estratégia:
Essa capacidade é atingida ao implementar-se a seguinte estratégia:
Provas
Questão presente nas seguintes provas
How space technology is bringing
green wins for transport
1 Space technology is developing fast, and, with
every advance, it is becoming more accessible to
industry. Today, satellite communications (satcoms)
and space-based data are underpinning new ways
of operating that boost both sustainability and
profitability. Some projects are still in the planning
stages, offering great promise for the future. However,
others are already delivering practical results.
2 The benefits of space technology broadly fall
into two categories: connectivity that can reach into
situations where terrestrial technologies struggle to
deliver and the deep, unique insights delivered by
Earth Observation (EO) data. Both depend on access
to satellite networks, particularly medium earth orbit
(MEO) and low earth orbit (LEO) satellites that offer
low-latency connectivity and frequently updated data.
Right now, the satellite supplier market is booming,
driving down the cost of access to satellites. Suppliers
are increasingly tailoring their services to emerging
customer needs and the potential applications are
incredible – as a look at the transportation sector
shows.
3 Satellite technology is a critical part of
revolutionizing connectivity on trains. The Satellites
for Digitalization of Railways (SODOR) project will
provide low latency, highly reliable connectivity that,
combined with monitoring sensors, will mean near realtime data guides operational decisions. This insight
will help trains run more efficiently with fewer delays
for passengers. Launching this year, SODOR will help
operators reduce emissions by using the network
more efficiently, allowing preventative maintenance
and extending the lifetime of some existing trains. It
will also make rail travel more attractive and help shift
more passengers from road to rail (that typically emits
even less CO2
per passenger than electric cars do).
4 Satellite data and communications will also play
a fundamental role in shaping a sustainable future
for road vehicles. Right now, the transport sector
contributes around 14% of the UK’s greenhouse gas
emissions, of which 91% is from road vehicles – and
this needs to change.
5 A future where Electric Vehicles (EV) dominate
will need a smart infrastructure to monitor and control
the electricity network, managing highly variable
supply and demand, as well as a large network of
EV charging points. EO data will be critical in future
forecasting models for wind and solar production, to
help manage a consistent flow of green energy.
6 Satellite communications will also be pivotal. As
more wind and solar installations join the electricity
network – often in remote locations – satcoms will step in to deliver highly reliable connectivity where 4G
struggles to reach. It will underpin a growing network
of EV charging points, connecting each point to the
internet for operational management purposes, for
billing and access app functionality and for the users’
comfort, they may access the system wherever they
are.
7 Satellite technology will increasingly be a part of
the vehicles themselves, particularly when automated
driving becomes more mainstream. It will be essential
for every vehicle to have continuous connectivity to
support real-time software patches, map updates
and inter-vehicle communications. Already, satellites
provide regular software updates to vehicles and
enhanced safety through an in-car emergency call
service.
8 At our company, we have been deeply embedded
in the space engineering for more than 40 years – and
we continue to be involved with the state-of-the-art
technologies and use cases. We have a strong track
record of translating these advances into practical
benefits for our customers that make sense on both a
business and a sustainability level.
Available at: https://www.cgi.com/uk/en-gb/blog/space/how-space-technology-is-bringing-green-wins-to-transport. Retrieved on
April 25, 2023. Adapted.
Provas
Questão presente nas seguintes provas
How space technology is bringing
green wins for transport
1 Space technology is developing fast, and, with
every advance, it is becoming more accessible to
industry. Today, satellite communications (satcoms)
and space-based data are underpinning new ways
of operating that boost both sustainability and
profitability. Some projects are still in the planning
stages, offering great promise for the future. However,
others are already delivering practical results.
2 The benefits of space technology broadly fall
into two categories: connectivity that can reach into
situations where terrestrial technologies struggle to
deliver and the deep, unique insights delivered by
Earth Observation (EO) data. Both depend on access
to satellite networks, particularly medium earth orbit
(MEO) and low earth orbit (LEO) satellites that offer
low-latency connectivity and frequently updated data.
Right now, the satellite supplier market is booming,
driving down the cost of access to satellites. Suppliers
are increasingly tailoring their services to emerging
customer needs and the potential applications are
incredible – as a look at the transportation sector
shows.
3 Satellite technology is a critical part of
revolutionizing connectivity on trains. The Satellites
for Digitalization of Railways (SODOR) project will
provide low latency, highly reliable connectivity that,
combined with monitoring sensors, will mean near realtime data guides operational decisions. This insight
will help trains run more efficiently with fewer delays
for passengers. Launching this year, SODOR will help
operators reduce emissions by using the network
more efficiently, allowing preventative maintenance
and extending the lifetime of some existing trains. It
will also make rail travel more attractive and help shift
more passengers from road to rail (that typically emits
even less CO2
per passenger than electric cars do).
4 Satellite data and communications will also play
a fundamental role in shaping a sustainable future
for road vehicles. Right now, the transport sector
contributes around 14% of the UK’s greenhouse gas
emissions, of which 91% is from road vehicles – and
this needs to change.
5 A future where Electric Vehicles (EV) dominate
will need a smart infrastructure to monitor and control
the electricity network, managing highly variable
supply and demand, as well as a large network of
EV charging points. EO data will be critical in future
forecasting models for wind and solar production, to
help manage a consistent flow of green energy.
6 Satellite communications will also be pivotal. As
more wind and solar installations join the electricity
network – often in remote locations – satcoms will step in to deliver highly reliable connectivity where 4G
struggles to reach. It will underpin a growing network
of EV charging points, connecting each point to the
internet for operational management purposes, for
billing and access app functionality and for the users’
comfort, they may access the system wherever they
are.
7 Satellite technology will increasingly be a part of
the vehicles themselves, particularly when automated
driving becomes more mainstream. It will be essential
for every vehicle to have continuous connectivity to
support real-time software patches, map updates
and inter-vehicle communications. Already, satellites
provide regular software updates to vehicles and
enhanced safety through an in-car emergency call
service.
8 At our company, we have been deeply embedded
in the space engineering for more than 40 years – and
we continue to be involved with the state-of-the-art
technologies and use cases. We have a strong track
record of translating these advances into practical
benefits for our customers that make sense on both a
business and a sustainability level.
Available at: https://www.cgi.com/uk/en-gb/blog/space/how-space-technology-is-bringing-green-wins-to-transport. Retrieved on
April 25, 2023. Adapted.
Provas
Questão presente nas seguintes provas
How space technology is bringing
green wins for transport
1 Space technology is developing fast, and, with
every advance, it is becoming more accessible to
industry. Today, satellite communications (satcoms)
and space-based data are underpinning new ways
of operating that boost both sustainability and
profitability. Some projects are still in the planning
stages, offering great promise for the future. However,
others are already delivering practical results.
2 The benefits of space technology broadly fall
into two categories: connectivity that can reach into
situations where terrestrial technologies struggle to
deliver and the deep, unique insights delivered by
Earth Observation (EO) data. Both depend on access
to satellite networks, particularly medium earth orbit
(MEO) and low earth orbit (LEO) satellites that offer
low-latency connectivity and frequently updated data.
Right now, the satellite supplier market is booming,
driving down the cost of access to satellites. Suppliers
are increasingly tailoring their services to emerging
customer needs and the potential applications are
incredible – as a look at the transportation sector
shows.
3 Satellite technology is a critical part of
revolutionizing connectivity on trains. The Satellites
for Digitalization of Railways (SODOR) project will
provide low latency, highly reliable connectivity that,
combined with monitoring sensors, will mean near realtime data guides operational decisions. This insight
will help trains run more efficiently with fewer delays
for passengers. Launching this year, SODOR will help
operators reduce emissions by using the network
more efficiently, allowing preventative maintenance
and extending the lifetime of some existing trains. It
will also make rail travel more attractive and help shift
more passengers from road to rail (that typically emits
even less CO2
per passenger than electric cars do).
4 Satellite data and communications will also play
a fundamental role in shaping a sustainable future
for road vehicles. Right now, the transport sector
contributes around 14% of the UK’s greenhouse gas
emissions, of which 91% is from road vehicles – and
this needs to change.
5 A future where Electric Vehicles (EV) dominate
will need a smart infrastructure to monitor and control
the electricity network, managing highly variable
supply and demand, as well as a large network of
EV charging points. EO data will be critical in future
forecasting models for wind and solar production, to
help manage a consistent flow of green energy.
6 Satellite communications will also be pivotal. As
more wind and solar installations join the electricity
network – often in remote locations – satcoms will step in to deliver highly reliable connectivity where 4G
struggles to reach. It will underpin a growing network
of EV charging points, connecting each point to the
internet for operational management purposes, for
billing and access app functionality and for the users’
comfort, they may access the system wherever they
are.
7 Satellite technology will increasingly be a part of
the vehicles themselves, particularly when automated
driving becomes more mainstream. It will be essential
for every vehicle to have continuous connectivity to
support real-time software patches, map updates
and inter-vehicle communications. Already, satellites
provide regular software updates to vehicles and
enhanced safety through an in-car emergency call
service.
8 At our company, we have been deeply embedded
in the space engineering for more than 40 years – and
we continue to be involved with the state-of-the-art
technologies and use cases. We have a strong track
record of translating these advances into practical
benefits for our customers that make sense on both a
business and a sustainability level.
Available at: https://www.cgi.com/uk/en-gb/blog/space/how-space-technology-is-bringing-green-wins-to-transport. Retrieved on
April 25, 2023. Adapted.
Provas
Questão presente nas seguintes provas
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