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Sobre o sistema RAID (Redundant Array of Inexpensive Drives) julgue os itens abaixo:
I. RAID 0 - Os dados são subdivididos em segmentos consecutivos, que são escritos sequencialmente nos diversos discos do conjunto. Cada segmento tem um tamanho definido em blocos. Essa configuração oferece melhor desempenho quando comparado a discos individuais, se o tamanho de cada segmento for ajustado de acordo com a aplicação que utilizará o conjunto.
II. RAID 1 - Implementa o espelhamento de discos. Nesta implementação são necessários no mínimo dois discos, sendo sempre necessário um número par de discos. Neste nível, todos os dados são gravados em dois discos diferentes.
III. RAID 5 – Esse nível utiliza a técnica de paridade da informação, que é armazenada em um disco específico. No caso de substituição de um dos discos do conjunto, é possível reconstruir a informação do disco danificado com base nas informações dos discos restantes.
São VERDADEIROS apenas os itens:
Um servidor Linux, de IP 192.168.10.253, possui duas HBAs (Host Bus Adapters) FC (Fibre Channel) ligados a uma SAN (Storage Area Network), com uma LUN (Logical Unit Number) de 1 TiB (Terabyte) apresentada e em uso por meio de volume LVM (Logical Volume Manager). O VG (Volume Group) "vg_dados", o LV (Logical Volume) "lv_financeiro" e ponto de montagem "/dados/financeiro" associado ao LV estão cheios, sem espaço livre. A opção para expansão é adicionar mais disco físico ao LVM. O operador de backups realizou um backup, por segurança. O administrador do storage criou uma nova LUN de 1 TiB, apresentou-a às HBAs do servidor e avisou ao administrador do servidor. Analise as instruções de console abaixo que o administrador do servidor precisará fazer a partir de sua estação de trabalho Linux para expandir "/dados/financeiro" do servidor remoto, sem gerar indisponibilidade do mesmo.
1. vgextend vg_dados /dev/dm-1
2. systemctl reload multipathd.service
3. echo -e "o\nn\np\n1\n\n\nt\n8e\nw"| fdisk /dev/dm-1
4. lvresize -f -L +900GiB /dev/vg_dados/lv_financeiro
5. sudo -s
6. pvcreate /dev/dm-1
7. ssh -l admin 192.168.10.253
8. for i in {0..1}; do echo "- - -" > /sys/class/scsi_host/host$i/scan; done
9. resize2fs /dev/vg_dados/lv_financeiro
A CORRETA sequência de instruções é:
Sobre discos magnéticos, hard-disk, analise as afirmativas a seguir:
I. Taxa de transferência interna é a efetiva velocidade do HD ao ler arquivos gravados em setores sequenciais.
II. O tempo gasto para interpretação do endereço pela unidade de controle é chamado Latência.
III. Podem ser ligados apenas através de conectores SATA.
Está CORRETO o que se afirma em:
Em relação à memória de um sistema de computação, analise as afirmativas a seguir:
I. A existência de vários tipos de memória ocorre pelo aumento da velocidade das CPUs, muito maior que o tempo de acesso da memória, o que ocasiona atrasos na comunicação entre memória e CPU e vice-versa.
II. A memória cache é responsável por manter palavras de memória utilizadas com mais frequência nas operações entre a CPU e periféricos de E/S.
III. O modo como o sistema de memória é construído e a velocidade dos seus circuitos são fatores preponderantes para o cálculo do tempo de acesso de uma memória.
Está CORRETO o que se afirma em:
Com base na organização e arquitetura de computadores, analise as afirmativas abaixo e assinale a alternativa CORRETA.
I. O conceito de pipeline consiste em dividir a execução da instrução em várias partes, sendo cada uma delas manipulada por unidades dedicadas do hardware que trabalham em paralelo.
II. Os compiladores são programas que recebem como entrada arquivos-texto contendo módulos escritos em linguagem de alto nível e geram como saída arquivos-objeto correspondentes a cada módulo.
III. O clock é um circuito oscilador que tem a função de sincronizar e determinar a medida de velocidade de transferência de dados no computador.
History and Debate of Internet Censorship
Censorship refers to any action taken by a society to control access to ideas and information. Throughout history, many different types of societies, including democracies, have used censorship in various ways. The issue is increasingly important due to the rapid development of new communication technology. As innovators continue to create new ways for people to share information, many people are now arguing over the issue of censorship.
Pros and Cons of the Internet Censorship Debate
For the proponents of censorship, restricting the access of information is something that can provide benefits to society. By censoring pornography on the internet, children are less likely to encounter it. By censoring certain types of images and videos, society can prevent offensive or vulgar material from offending those that it targets. For example, some would argue that society should censor material that is insulting to a particular religion in order to maintain societal harmony. In this way, censorship is viewed as a way to protect society as a whole or certain segments of society from material that is seen as offensive or damaging.
Some argue that censorship is necessary to preserve national security. Without using any kind of censorship, they argue that it is impossible to maintain the secrecy of information necessary for protecting the nation. For this purpose, censorship protects a state's military or security secrets from its enemies who can use that information against the state.
Those who are against censorship argue that the practice limits the freedoms of speech, the press and expression and that these limitations are ultimately a detriment to society. By preventing free access to information, it is argued that society is fostering ignorance in its citizens. Through this ignorance, citizens are more easily controlled by special interest groups, and groups that are able to take power are able to use censorship to maintain themselves. Additionally, they argue that censorship limits a society's ability to advance in its understanding of the world.
Another main issue for those who are against censorship is a history of censorship abuse. Those who argue against censorship can point to a number of examples of dictators who used censorship to create flattering yet untrue images of themselves for the purpose of maintaining control over a society. They argue that people should control the government instead of the government controlling its people.
(SOURCE: http://www.debate.org/internet-censorship/ accessed
on 19/02/16 at 3:10 pm).
History and Debate of Internet Censorship
Censorship refers to any action taken by a society to control access to ideas and information. Throughout history, many different types of societies, including democracies, have used censorship in various ways. The issue is increasingly important due to the rapid development of new communication technology. As innovators continue to create new ways for people to share information, many people are now arguing over the issue of censorship.
Pros and Cons of the Internet Censorship Debate
For the proponents of censorship, restricting the access of information is something that can provide benefits to society. By censoring pornography on the internet, children are less likely to encounter it. By censoring certain types of images and videos, society can prevent offensive or vulgar material from offending those that it targets. For example, some would argue that society should censor material that is insulting to a particular religion in order to maintain societal harmony. In this way, censorship is viewed as a way to protect society as a whole or certain segments of society from material that is seen as offensive or damaging.
Some argue that censorship is necessary to preserve national security. Without using any kind of censorship, they argue that it is impossible to maintain the secrecy of information necessary for protecting the nation. For this purpose, censorship protects a state's military or security secrets from its enemies who can use that information against the state.
Those who are against censorship argue that the practice limits the freedoms of speech, the press and expression and that these limitations are ultimately a detriment to society. By preventing free access to information, it is argued that society is fostering ignorance in its citizens. Through this ignorance, citizens are more easily controlled by special interest groups, and groups that are able to take power are able to use censorship to maintain themselves. Additionally, they argue that censorship limits a society's ability to advance in its understanding of the world.
Another main issue for those who are against censorship is a history of censorship abuse. Those who argue against censorship can point to a number of examples of dictators who used censorship to create flattering yet untrue images of themselves for the purpose of maintaining control over a society. They argue that people should control the government instead of the government controlling its people.
(SOURCE: http://www.debate.org/internet-censorship/ accessed
on 19/02/16 at 3:10 pm).
History and Debate of Internet Censorship
Censorship refers to any action taken by a society to control access to ideas and information. Throughout history, many different types of societies, including democracies, have used censorship in various ways. The issue is increasingly important due to the rapid development of new communication technology. As innovators continue to create new ways for people to share information, many people are now arguing over the issue of censorship.
Pros and Cons of the Internet Censorship Debate
For the proponents of censorship, restricting the access of information is something that can provide benefits to society. By censoring pornography on the internet, children are less likely to encounter it. By censoring certain types of images and videos, society can prevent offensive or vulgar material from offending those that it targets. For example, some would argue that society should censor material that is insulting to a particular religion in order to maintain societal harmony. In this way, censorship is viewed as a way to protect society as a whole or certain segments of society from material that is seen as offensive or damaging.
Some argue that censorship is necessary to preserve national security. Without using any kind of censorship, they argue that it is impossible to maintain the secrecy of information necessary for protecting the nation. For this purpose, censorship protects a state's military or security secrets from its enemies who can use that information against the state.
Those who are against censorship argue that the practice limits the freedoms of speech, the press and expression and that these limitations are ultimately a detriment to society. By preventing free access to information, it is argued that society is fostering ignorance in its citizens. Through this ignorance, citizens are more easily controlled by special interest groups, and groups that are able to take power are able to use censorship to maintain themselves. Additionally, they argue that censorship limits a society's ability to advance in its understanding of the world.
Another main issue for those who are against censorship is a history of censorship abuse. Those who argue against censorship can point to a number of examples of dictators who used censorship to create flattering yet untrue images of themselves for the purpose of maintaining control over a society. They argue that people should control the government instead of the government controlling its people.
(SOURCE: http://www.debate.org/internet-censorship/ accessed
on 19/02/16 at 3:10 pm).
―"A compressão de dados pode ser realizada por intermédio de diversos algoritmos de compressão, reduzindo a quantidade de bits para representar um conjunto de dados. A compressão de imagem é a forma de armazenar informações visuais mais compactamente. A MAIORIA DESSES MÉTODOS CONSIDERA A IDENTIFICAÇÃO E O USO DE ESTRUTURAS E REDUNDÂNCIAS que existem nos dados da imagem. Os tipos de redundância encontrados nas imagens são ligados à codificação de tons ou cor, redundância da informação interpixel, espectral e psicovisual".
(AZEVEDO, Eduardo e CONCI, Aura. Computação Gráfica:
Teoria e Prática. Rio de Janeiro: Campus, 2003).
Assinale a alternativa em que a concordância se realiza pela
mesma razão que a oração destacada na frase acima:
Conheça nossos planos