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Com respeito ao pacote reticulate da linguagem R, que propicia uma interface com os módulos, classes e funções do Python, julgue o item a seguir.
O código seguinte permite importar o módulo math para utilização no ambiente R.
library(reticulate)
math <- use_python("math")
No que se refere a técnicas de modelagem e aplicações de data warehousing, julgue o item seguinte.
A modelagem multidimensional é a técnica de modelagem
de banco de dados para o auxílio às consultas do data
warehousing nas mais diferentes perspectivas. A visão
multidimensional permite o uso mais intuitivo para o
processamento analítico online.
No que se refere a técnicas de modelagem e aplicações de data warehousing, julgue o item seguinte.
ETL é um tipo de data integration com capacidades
analíticas sofisticadas que permite que os dados sejam
analisados a partir de visões multidimensionais complexas e
elaboradas. Além disso, esse sistema possibilita alterar e
analisar grandes quantidades de dados em várias perspectivas
diferentes.
No que se refere a técnicas de modelagem e aplicações de data warehousing, julgue o item seguinte.
Um data warehousing transforma dados operacionais em
informação voltada à tomada de decisão estratégica. As
consultas realizadas são executadas e processadas nos
provedores de informação originais.
Acerca do Sistema Gerenciador de Banco de Dados (SGBD), julgue o item a seguir.
Uma das técnicas utilizadas para a otimização de um banco
de dados é a utilização de pool de conexões.
Acerca do Sistema Gerenciador de Banco de Dados (SGBD), julgue o item a seguir.
O balanceamento de carga pode ser feito por meio de
appliances (hardware que implementam funcionalidades
específicas na rede) ou por software.
Acerca do Sistema Gerenciador de Banco de Dados (SGBD), julgue o item a seguir.
A confiabilidade (reliability) refere-se à propriedade de um
sistema estar acessível e operacional quando necessário e
retornar os resultados esperados.
Acerca do Sistema Gerenciador de Banco de Dados (SGBD), julgue o item a seguir.
Os sistemas de banco de dados são classificados em modelo
relacional e modelo estruturado.
Acerca do Sistema Gerenciador de Banco de Dados (SGBD), julgue o item a seguir.
Tabelas lógicas são usadas para representar o modelo
hierárquico das estruturas de relação.
Considerando as novas inovações promovidas pelo open banking e pelo sistema de pagamentos do PIX, julgue o próximo item.
O open banking reduz a exposição ao risco operacional.
Considerando as novas inovações promovidas pelo open banking e pelo sistema de pagamentos do PIX, julgue o próximo item.
O PIX consiste na plataforma pública na qual os bancos
fazem transações diretas e instantâneas com clientes e
usuários.
Quanto aos principais riscos incorridos pelas instituições financeiras bancárias, julgue o item subsequente.
O risco operacional está relacionado à possibilidade de
funcionário entrar com ação trabalhista contra a instituição
empregadora.
No que se refere às instituições e ao funcionamento do Sistema Financeiro Nacional (SFN), julgue o item que se segue.
As empresas de cartão de crédito não participam do SFN.
China has charged ahead with a bold effort to remake the way that government-backed money works, rolling out its own digital currency with different qualities than cash or digital deposits. The country’s central bank started testing a new electronic currency, which was named electronic Chinese yuan or eCNY, last year in four cities and have recently expanded those trials to bigger cities such as Beijing and Shanghai, according to government presentations. No other major power is as far along with a homegrown digital currency.
The effort is one of several by central banks around the world to try new forms of digital money that can move faster and give even the most disadvantaged people access to online financial tools. Digital currencies created by central banks give governments more of a financial grip. These currencies can enable direct handouts of money that expire if not used by a particular date and can make it easier for governments to track financial transactions to stamp out tax evasion and crack down on dissidents.
If the eCNY is successful, it will give the central bank new powers, including novel types of monetary policy to help the economy grow. In one possibility that economists have discussed, a central bank could program its digital currency to slowly lose value so that consumers are encouraged to spend it immediately. Also, the eCNY could immediately give the Chinese government more power to monitor finance flows because a digital currency system can record every transaction.
Internet: <www.nytimes.com>(adapted).
Judge the following item, concerning the ideas stated in the text and the words used in it.
If consumers spend the new currency immediately, the
central bank will find a way to make it lose its worth
accordingly.
China has charged ahead with a bold effort to remake the way that government-backed money works, rolling out its own digital currency with different qualities than cash or digital deposits. The country’s central bank started testing a new electronic currency, which was named electronic Chinese yuan or eCNY, last year in four cities and have recently expanded those trials to bigger cities such as Beijing and Shanghai, according to government presentations. No other major power is as far along with a homegrown digital currency.
The effort is one of several by central banks around the world to try new forms of digital money that can move faster and give even the most disadvantaged people access to online financial tools. Digital currencies created by central banks give governments more of a financial grip. These currencies can enable direct handouts of money that expire if not used by a particular date and can make it easier for governments to track financial transactions to stamp out tax evasion and crack down on dissidents.
If the eCNY is successful, it will give the central bank new powers, including novel types of monetary policy to help the economy grow. In one possibility that economists have discussed, a central bank could program its digital currency to slowly lose value so that consumers are encouraged to spend it immediately. Also, the eCNY could immediately give the Chinese government more power to monitor finance flows because a digital currency system can record every transaction.
Internet: <www.nytimes.com>(adapted).
Judge the following item, concerning the ideas stated in the text and the words used in it.
Some of the benefits that digital currencies like eCNY can
offer are an expiration date if not used by a particular date
and the tracking of the users’ financial transactions.
China has charged ahead with a bold effort to remake the way that government-backed money works, rolling out its own digital currency with different qualities than cash or digital deposits. The country’s central bank started testing a new electronic currency, which was named electronic Chinese yuan or eCNY, last year in four cities and have recently expanded those trials to bigger cities such as Beijing and Shanghai, according to government presentations. No other major power is as far along with a homegrown digital currency.
The effort is one of several by central banks around the world to try new forms of digital money that can move faster and give even the most disadvantaged people access to online financial tools. Digital currencies created by central banks give governments more of a financial grip. These currencies can enable direct handouts of money that expire if not used by a particular date and can make it easier for governments to track financial transactions to stamp out tax evasion and crack down on dissidents.
If the eCNY is successful, it will give the central bank new powers, including novel types of monetary policy to help the economy grow. In one possibility that economists have discussed, a central bank could program its digital currency to slowly lose value so that consumers are encouraged to spend it immediately. Also, the eCNY could immediately give the Chinese government more power to monitor finance flows because a digital currency system can record every transaction.
Internet: <www.nytimes.com>(adapted).
Judge the following item, concerning the ideas stated in the text and the words used in it.
China is not the only country which has tried to implement a
digital currency to make people’s lives more practical and
convenient.
China has charged ahead with a bold effort to remake the way that government-backed money works, rolling out its own digital currency with different qualities than cash or digital deposits. The country’s central bank started testing a new electronic currency, which was named electronic Chinese yuan or eCNY, last year in four cities and have recently expanded those trials to bigger cities such as Beijing and Shanghai, according to government presentations. No other major power is as far along with a homegrown digital currency.
The effort is one of several by central banks around the world to try new forms of digital money that can move faster and give even the most disadvantaged people access to online financial tools. Digital currencies created by central banks give governments more of a financial grip. These currencies can enable direct handouts of money that expire if not used by a particular date and can make it easier for governments to track financial transactions to stamp out tax evasion and crack down on dissidents.
If the eCNY is successful, it will give the central bank new powers, including novel types of monetary policy to help the economy grow. In one possibility that economists have discussed, a central bank could program its digital currency to slowly lose value so that consumers are encouraged to spend it immediately. Also, the eCNY could immediately give the Chinese government more power to monitor finance flows because a digital currency system can record every transaction.
Internet: <www.nytimes.com>(adapted).
Judge the following item, concerning the ideas stated in the text and the words used in it.
The word “major”, on the last sentence of the first paragraph,
can be correctly replaced by biggest without changing the
meaning of the text.
China has charged ahead with a bold effort to remake the way that government-backed money works, rolling out its own digital currency with different qualities than cash or digital deposits. The country’s central bank started testing a new electronic currency, which was named electronic Chinese yuan or eCNY, last year in four cities and have recently expanded those trials to bigger cities such as Beijing and Shanghai, according to government presentations. No other major power is as far along with a homegrown digital currency.
The effort is one of several by central banks around the world to try new forms of digital money that can move faster and give even the most disadvantaged people access to online financial tools. Digital currencies created by central banks give governments more of a financial grip. These currencies can enable direct handouts of money that expire if not used by a particular date and can make it easier for governments to track financial transactions to stamp out tax evasion and crack down on dissidents.
If the eCNY is successful, it will give the central bank new powers, including novel types of monetary policy to help the economy grow. In one possibility that economists have discussed, a central bank could program its digital currency to slowly lose value so that consumers are encouraged to spend it immediately. Also, the eCNY could immediately give the Chinese government more power to monitor finance flows because a digital currency system can record every transaction.
Internet: <www.nytimes.com>(adapted).
Judge the following item, concerning the ideas stated in the text and the words used in it.
eCNY was first tested in four big cities like Beijing and
Shanghai before they expanded it to other cities.
Considerando dois eventos aleatórios A e B, tais que P(A|B) = 1/3, P(B|A) = 0,5 e P(A ∪ B) = 0,8, julgue o seguinte item.
P(A) > P(B).
Considere que uma tendência linear na forma ŷ = 4x + 2 tenha sido obtida com base no método dos mínimos quadrados ordinários. Acerca dessa tendência, sabe-se ainda que o desvio padrão da variável y foi igual a 8; que o desvio padrão da variável x foi igual a 1; e que a média aritmética da variável x foi igual a 2. Com base nessas informações, julgue o item subsequente, relativo a essa tendência linear.
A covariância entre as variáveis x e y foi superior a 2.
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