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Assinale a alternativa que contém uma afirmação correta sobre diagramas de classes e de objetos, da UML 2.0.
Em um diagrama de classes na UML 2.0, a notação utilizada para denotar um atributo denominado “total”, com visibilidade privada e com multiplicidade 2, do tipo inteiro, é
Os serviços e as aplicações disponibilizadas na internet possuem a arquitetura Cliente/Servidor, como é o caso do serviço de acesso web. Em um ambiente Linux, um exemplo de servidor web é o
Considere o seguinte comando executado no sistema operacional Linux:
$ firefox &
Para retomar a execução do firefox em primeiro plano, pode-se utilizar o comando
Os processos computacionais no sistema operacional Linux podem ser executados por meio de shell scripts que automatizam e facilitam a interação do usuário com o Linux. Para indicar o tipo de shell a ser utilizado para a execução do script, o arquivo contendo o script deve ter, na primeira linha, a declaração:
A Microsoft comercializa diversos sistemas operacionais para diversos tipos de equipamentos e finalidades. Sobre esses sistemas, é correto afirmar que
Uma situação clássica, presente em sistemas operacionais, é conhecida como o “Problema do Produtor e do Consumidor”. Um recurso presente nos sistemas operacionais clássicos e que contribui para resolver esse problema é denominado
De uma forma geral, em um microprocessador, elemento essencial para a construção de microcomputadores, existe um registrador interno que contém o endereço da próxima instrução a ser buscada na memória. Trata-se do
Assinale a alternativa que apresenta uma afirmação correta a respeito da memória cache no sistema de memória de um computador.
Os computadores modernos utilizam a representação binária para manipular informações, que também podem ser expressas em outras notações, como a hexadecimal. Suponha que um programa em execução no computador deseje gravar, em uma posição de memória de endereço 0FD4h, o valor 75h. Na notação decimal, esse endereço e o valor a ser gravado possuem, respectivamente, a representação
De um argumento válido com duas premissas, conclui-se corretamente que João não é pai de Ana. Uma das premissas desse argumento afirma como verdadeiro que João é pai de Ana se, e somente se, Maria é tia de Ana. Sendo assim, uma segunda premissa verdadeira para esse argumento é
As duas afirmações a seguir são verdadeiras.
Se João é administrador ou Carlos é enfermeiro, então Marta é médica e Cássio é dentista.
Cássio não é dentista.
Das afirmações, pode-se concluir corretamente que
Considere a seguinte afirmação:
Se hoje chove, então amanhã faz frio.
Uma negação lógica para essa afirmação está apresentada na alternativa:
Analise o texto a seguir:
The Internet has become such an integral part of our lives, with such powerful capabilities, that it is easy to forget that this technological marvel was created by the long, hard, dedicated efforts of human beings – folks who had a vision of what universal networking could become and worked to make it happen. The key people, projects, and organizations that helped create the Internet are described below, first in a top-level summary and then in sections in roughly chronological order.
(Extraído de: Internet History. http://www.livinginternet.com/i/ii.htm)
Baseando-se no texto apresentado, é correto afirmar que
Considere o texto a seguir:
We should point out here that the focal point of any operating system is its ‘kernel’. Without going into great detail, the kernel is what tells the big chip that controls your computer to do what you want the program that you’re using to do. To use a metaphor, if you go to your favorite Italian restaurant and order ‘Spaghetti alla Bolognese’, this dish is like your operating system. There are a lot of things that go into making that dish like pasta, tomato sauce, meatballs and cheese. Well, the kernel is like the pasta. Without pasta, that dish doesn’t exist. You might as well find some bread and make a sandwich. A plate of just pasta is fairly unappetizing.
Without a kernel, an operating system doesn’t exist. Without programs, a kernel is useless.
(Extraído de: Beginners Level Course: What is Linux? linux.org.
http://www.linux.org/threads/what-is-linux.4076/)
Segundo o texto, pode-se interpretar que
O texto a seguir deve ser utilizado para responder às questões de números 21 a 23.
Historically, information security has been called a number of different things such as:
• Data security;
• IT Security;
• Computer security.
But these terms (except possibly data security) ignore the fact that the information that is held on the computers is almost always and most certainly worth many times more than the computers that it runs on. The correct term is ‘information security’ and typically information security comprises three component parts:
• Confidentiality. Assurance that information is shared only among authorised persons or organisations. Breaches of confidentiality can occur when data is not handled in a manner appropriate to safeguard the confidentiality of the information concerned. Such disclosure can take place by word of mouth, by printing, copying, e-mailing or creating documents and other data etc.;
• Integrity. Assurance that the information is authentic and complete. Ensuring that information can be relied upon to be sufficiently accurate for its purpose. The term ‘integrity’ is used frequently when considering information security as it represents one of the primary indicators of information security (or lack of it). The integrity of data is not only whether the data is ‘correct’, but whether it can be trusted and relied upon;
• Availability. Assurance that the systems responsible for delivering, storing and processing information are accessible when needed, by those who need them.
(Extraído de: “An Introduction to Information, Network and Internet Security.
What is ‘Information Security’?” The Security Practitioner
http://security.practitioner.com/introduction/infosec_2.htm)
Os sinônimos para o termo “assurance”, dentro do contexto, são:
O texto a seguir deve ser utilizado para responder às questões de números 21 a 23.
Historically, information security has been called a number of different things such as:
• Data security;
• IT Security;
• Computer security.
But these terms (except possibly data security) ignore the fact that the information that is held on the computers is almost always and most certainly worth many times more than the computers that it runs on. The correct term is ‘information security’ and typically information security comprises three component parts:
• Confidentiality. Assurance that information is shared only among authorised persons or organisations. Breaches of confidentiality can occur when data is not handled in a manner appropriate to safeguard the confidentiality of the information concerned. Such disclosure can take place by word of mouth, by printing, copying, e-mailing or creating documents and other data etc.;
• Integrity. Assurance that the information is authentic and complete. Ensuring that information can be relied upon to be sufficiently accurate for its purpose. The term ‘integrity’ is used frequently when considering information security as it represents one of the primary indicators of information security (or lack of it). The integrity of data is not only whether the data is ‘correct’, but whether it can be trusted and relied upon;
• Availability. Assurance that the systems responsible for delivering, storing and processing information are accessible when needed, by those who need them.
(Extraído de: “An Introduction to Information, Network and Internet Security.
What is ‘Information Security’?” The Security Practitioner
http://security.practitioner.com/introduction/infosec_2.htm)
Segundo o texto, quando os dados não são tratados de forma adequada para salvaguardar a confidencialidade da informação de interesse, pode ocorrer
O texto a seguir deve ser utilizado para responder às questões de números 21 a 23.
Historically, information security has been called a number of different things such as:
• Data security;
• IT Security;
• Computer security.
But these terms (except possibly data security) ignore the fact that the information that is held on the computers is almost always and most certainly worth many times more than the computers that it runs on. The correct term is ‘information security’ and typically information security comprises three component parts:
• Confidentiality. Assurance that information is shared only among authorised persons or organisations. Breaches of confidentiality can occur when data is not handled in a manner appropriate to safeguard the confidentiality of the information concerned. Such disclosure can take place by word of mouth, by printing, copying, e-mailing or creating documents and other data etc.;
• Integrity. Assurance that the information is authentic and complete. Ensuring that information can be relied upon to be sufficiently accurate for its purpose. The term ‘integrity’ is used frequently when considering information security as it represents one of the primary indicators of information security (or lack of it). The integrity of data is not only whether the data is ‘correct’, but whether it can be trusted and relied upon;
• Availability. Assurance that the systems responsible for delivering, storing and processing information are accessible when needed, by those who need them.
(Extraído de: “An Introduction to Information, Network and Internet Security.
What is ‘Information Security’?” The Security Practitioner
http://security.practitioner.com/introduction/infosec_2.htm)
A melhor tradução, dentro do contexto, para “information security comprises three component parts” é:
Sobre memórias, é incorreto afirmar:
Sobre barramentos, é correto afirmar: