Questões de Concurso Comentadas para stf

Foram encontradas 990 questões

Resolva questões gratuitamente!

Junte-se a mais de 4 milhões de concurseiros!

Q351832 Inglês
Types of operating systems

Real-time
A real-time operating system is a multitasking operating system that aims at executing real-time applications. Real-time operating systems often use specialized scheduling algorithms so that they can achieve a deterministic nature of behavior. The main objective of real-time operating systems is their quick and predictable response to events. They have an event-driven or time-sharing design and often aspects of both. An event-driven system switches between tasks based on their priorities or external events while time-sharing operating systems switch tasks based on clock interrupts.

Multi-user
A multi-user operating system allows multiple users to access a computer system at the same time. Time-sharing systems and Internet servers can be classified as multi-user systems as they enable multiple-user access to a computer through the sharing of time. Single-user operating systems have only one user but may allow multiple programs to run at the same time.

Multi-tasking vs. single-tasking
A multi-tasking operating system allows more than one program to be running at the same time, from the point of view of human time scales. A single-tasking system has only one running program. Multi-tasking can be of two types: pre-emptive and co-operative. In pre-emptive multitasking, the operating system slices the CPU time and dedicates one slot to each of the programs. Unix-like operating systems such as Solaris and Linux support pre-emptive multitasking, as does AmigaOS. Cooperative multitasking is achieved by relying on each process to give time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking. 32-bit versions of both Windows NT and Win9x, used pre-emptive multi-tasking. Mac OS prior to OS X used to support cooperative multitasking.

Distributed
A distributed operating system manages a group of independent computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing. Distributed computations are carried out on more than one machine. When computers in a group work in cooperation, they make a distributed system.


Embedded
Embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy. They are able to operate with a limited number of resources. They are very compact and extremely efficient by design. Windows CE and Minix 3 are some examples of embedded operating systems.

Internet: http://en.wikipedia.org (adapted)
Based on the text above, judge the following items from 111 through 116.

When a distributed operating system is used for managing several independent computers, this group of computers appears to behave like a single computer.
Alternativas
Q351831 Inglês
Types of operating systems

Real-time
A real-time operating system is a multitasking operating system that aims at executing real-time applications. Real-time operating systems often use specialized scheduling algorithms so that they can achieve a deterministic nature of behavior. The main objective of real-time operating systems is their quick and predictable response to events. They have an event-driven or time-sharing design and often aspects of both. An event-driven system switches between tasks based on their priorities or external events while time-sharing operating systems switch tasks based on clock interrupts.

Multi-user
A multi-user operating system allows multiple users to access a computer system at the same time. Time-sharing systems and Internet servers can be classified as multi-user systems as they enable multiple-user access to a computer through the sharing of time. Single-user operating systems have only one user but may allow multiple programs to run at the same time.

Multi-tasking vs. single-tasking
A multi-tasking operating system allows more than one program to be running at the same time, from the point of view of human time scales. A single-tasking system has only one running program. Multi-tasking can be of two types: pre-emptive and co-operative. In pre-emptive multitasking, the operating system slices the CPU time and dedicates one slot to each of the programs. Unix-like operating systems such as Solaris and Linux support pre-emptive multitasking, as does AmigaOS. Cooperative multitasking is achieved by relying on each process to give time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking. 32-bit versions of both Windows NT and Win9x, used pre-emptive multi-tasking. Mac OS prior to OS X used to support cooperative multitasking.

Distributed
A distributed operating system manages a group of independent computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing. Distributed computations are carried out on more than one machine. When computers in a group work in cooperation, they make a distributed system.


Embedded
Embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy. They are able to operate with a limited number of resources. They are very compact and extremely efficient by design. Windows CE and Minix 3 are some examples of embedded operating systems.

Internet: http://en.wikipedia.org (adapted)
Based on the text above, judge the following items from 111 through 116.

Systems that use time-sharing are not considered to be multi- user systems, since they do not allow the simultaneous access of several users to a computer.
Alternativas
Q351830 Inglês
Types of operating systems

Real-time
A real-time operating system is a multitasking operating system that aims at executing real-time applications. Real-time operating systems often use specialized scheduling algorithms so that they can achieve a deterministic nature of behavior. The main objective of real-time operating systems is their quick and predictable response to events. They have an event-driven or time-sharing design and often aspects of both. An event-driven system switches between tasks based on their priorities or external events while time-sharing operating systems switch tasks based on clock interrupts.

Multi-user
A multi-user operating system allows multiple users to access a computer system at the same time. Time-sharing systems and Internet servers can be classified as multi-user systems as they enable multiple-user access to a computer through the sharing of time. Single-user operating systems have only one user but may allow multiple programs to run at the same time.

Multi-tasking vs. single-tasking
A multi-tasking operating system allows more than one program to be running at the same time, from the point of view of human time scales. A single-tasking system has only one running program. Multi-tasking can be of two types: pre-emptive and co-operative. In pre-emptive multitasking, the operating system slices the CPU time and dedicates one slot to each of the programs. Unix-like operating systems such as Solaris and Linux support pre-emptive multitasking, as does AmigaOS. Cooperative multitasking is achieved by relying on each process to give time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking. 32-bit versions of both Windows NT and Win9x, used pre-emptive multi-tasking. Mac OS prior to OS X used to support cooperative multitasking.

Distributed
A distributed operating system manages a group of independent computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing. Distributed computations are carried out on more than one machine. When computers in a group work in cooperation, they make a distributed system.


Embedded
Embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy. They are able to operate with a limited number of resources. They are very compact and extremely efficient by design. Windows CE and Minix 3 are some examples of embedded operating systems.

Internet: http://en.wikipedia.org (adapted)
Based on the text above, judge the following items from 111 through 116.

Since the first release of Windows NT, no version of Windows used cooperative multi-tasking.
Alternativas
Q351829 Inglês
Types of operating systems

Real-time
A real-time operating system is a multitasking operating system that aims at executing real-time applications. Real-time operating systems often use specialized scheduling algorithms so that they can achieve a deterministic nature of behavior. The main objective of real-time operating systems is their quick and predictable response to events. They have an event-driven or time-sharing design and often aspects of both. An event-driven system switches between tasks based on their priorities or external events while time-sharing operating systems switch tasks based on clock interrupts.

Multi-user
A multi-user operating system allows multiple users to access a computer system at the same time. Time-sharing systems and Internet servers can be classified as multi-user systems as they enable multiple-user access to a computer through the sharing of time. Single-user operating systems have only one user but may allow multiple programs to run at the same time.

Multi-tasking vs. single-tasking
A multi-tasking operating system allows more than one program to be running at the same time, from the point of view of human time scales. A single-tasking system has only one running program. Multi-tasking can be of two types: pre-emptive and co-operative. In pre-emptive multitasking, the operating system slices the CPU time and dedicates one slot to each of the programs. Unix-like operating systems such as Solaris and Linux support pre-emptive multitasking, as does AmigaOS. Cooperative multitasking is achieved by relying on each process to give time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking. 32-bit versions of both Windows NT and Win9x, used pre-emptive multi-tasking. Mac OS prior to OS X used to support cooperative multitasking.

Distributed
A distributed operating system manages a group of independent computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing. Distributed computations are carried out on more than one machine. When computers in a group work in cooperation, they make a distributed system.


Embedded
Embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy. They are able to operate with a limited number of resources. They are very compact and extremely efficient by design. Windows CE and Minix 3 are some examples of embedded operating systems.

Internet: http://en.wikipedia.org (adapted)
Based on the text above, judge the following items from 111 through 116.

Only rarely, operating systems use specific scheduling algorithms that make sure that the programs behave in a deterministic way.
Alternativas
Q351828 Inglês
Types of operating systems

Real-time
A real-time operating system is a multitasking operating system that aims at executing real-time applications. Real-time operating systems often use specialized scheduling algorithms so that they can achieve a deterministic nature of behavior. The main objective of real-time operating systems is their quick and predictable response to events. They have an event-driven or time-sharing design and often aspects of both. An event-driven system switches between tasks based on their priorities or external events while time-sharing operating systems switch tasks based on clock interrupts.

Multi-user
A multi-user operating system allows multiple users to access a computer system at the same time. Time-sharing systems and Internet servers can be classified as multi-user systems as they enable multiple-user access to a computer through the sharing of time. Single-user operating systems have only one user but may allow multiple programs to run at the same time.

Multi-tasking vs. single-tasking
A multi-tasking operating system allows more than one program to be running at the same time, from the point of view of human time scales. A single-tasking system has only one running program. Multi-tasking can be of two types: pre-emptive and co-operative. In pre-emptive multitasking, the operating system slices the CPU time and dedicates one slot to each of the programs. Unix-like operating systems such as Solaris and Linux support pre-emptive multitasking, as does AmigaOS. Cooperative multitasking is achieved by relying on each process to give time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking. 32-bit versions of both Windows NT and Win9x, used pre-emptive multi-tasking. Mac OS prior to OS X used to support cooperative multitasking.

Distributed
A distributed operating system manages a group of independent computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing. Distributed computations are carried out on more than one machine. When computers in a group work in cooperation, they make a distributed system.


Embedded
Embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy. They are able to operate with a limited number of resources. They are very compact and extremely efficient by design. Windows CE and Minix 3 are some examples of embedded operating systems.

Internet: http://en.wikipedia.org (adapted)
Based on the text above, judge the following items from 111 through 116.

Single-user operating systems do not allow the use of a computer by multiple users. Moreover, they do not allow more than one program to run at the same time.
Alternativas
Q351827 Inglês
Types of operating systems

Real-time
A real-time operating system is a multitasking operating system that aims at executing real-time applications. Real-time operating systems often use specialized scheduling algorithms so that they can achieve a deterministic nature of behavior. The main objective of real-time operating systems is their quick and predictable response to events. They have an event-driven or time-sharing design and often aspects of both. An event-driven system switches between tasks based on their priorities or external events while time-sharing operating systems switch tasks based on clock interrupts.

Multi-user
A multi-user operating system allows multiple users to access a computer system at the same time. Time-sharing systems and Internet servers can be classified as multi-user systems as they enable multiple-user access to a computer through the sharing of time. Single-user operating systems have only one user but may allow multiple programs to run at the same time.

Multi-tasking vs. single-tasking
A multi-tasking operating system allows more than one program to be running at the same time, from the point of view of human time scales. A single-tasking system has only one running program. Multi-tasking can be of two types: pre-emptive and co-operative. In pre-emptive multitasking, the operating system slices the CPU time and dedicates one slot to each of the programs. Unix-like operating systems such as Solaris and Linux support pre-emptive multitasking, as does AmigaOS. Cooperative multitasking is achieved by relying on each process to give time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking. 32-bit versions of both Windows NT and Win9x, used pre-emptive multi-tasking. Mac OS prior to OS X used to support cooperative multitasking.

Distributed
A distributed operating system manages a group of independent computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing. Distributed computations are carried out on more than one machine. When computers in a group work in cooperation, they make a distributed system.


Embedded
Embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy. They are able to operate with a limited number of resources. They are very compact and extremely efficient by design. Windows CE and Minix 3 are some examples of embedded operating systems.

Internet: http://en.wikipedia.org (adapted)
Based on the text above, judge the following items from 111 through 116.

In an event-driven system, the switching between tasks is triggered by clock interrupts, and the duration of each time slice is always the same.
Alternativas
Q351826 Sistemas Operacionais
Julgue o item abaixo acerca do Apache Web Server.

O comando apachectl test permite verificar, sem iniciar o servidor, a existência de erros de sintaxe nos arquivos de configuração.
Alternativas
Q351825 Programação
A respeito do JUnit e teste de carga com JMeter, julgue o próximo item.

O método setUp() é utilizado para sinalizar o início do processo de teste, ao passo que o método tearDown() sinaliza o final desse processo, desfazendo o que o setUp() fez.
Alternativas
Q351824 Banco de Dados
Julgue o item seguinte, a respeito do PL/SQL.

O gatilho é um tipo especializado de bloco de código PL/SQL extremamente útil em um ambiente distribuído, para simular um relacionamento de chave estrangeira entre tabelas que não existem no mesmo banco de dados.
Alternativas
Q351823 Programação
A respeito de HTML, XML e CSS3, julgue os itens subsequentes.

HTML5 é uma linguagem multiplataforma que permitiu o desenvolvimento de aplicações web executadas off-line e incorporou novos elementos de conteúdo específico, como <article>, <footer>, <nav> e <section>.
Alternativas
Q351820 Programação

A respeito de HTML, XML e CSS3, julgue os itens subsequentes.

Em um documento XML bem formado, os elementos pertinentes podem estar entrelaçados, desde que estejam aninhados.



Alternativas
Q351819 Programação
Com relação ao JSF (Javaserver Faces), julgue o item abaixo.

A configuração do controlador do JSF é realizada no servlet contido no arquivo web.xml. Essa servlet é responsável por receber as requisições e delegá-las ao núcleo do JSF.
Alternativas
Q351818 Programação
Julgue o próximo item a respeito de Java Script.

A função global isNaN() do Java Script permite determinar se o valor é um número natural ou uma string.
Alternativas
Q351817 Engenharia de Software
A respeito da técnica de refactoring, julgue o item seguinte.

O refactoring aprimora o design de um software, reduz a complexidade da aplicação, remove redundâncias desnecessárias, reutiliza código, otimiza o desempenho e evita a deterioração durante o ciclo de vida de um código.
Alternativas
Q351816 Engenharia de Software
A respeito do desenvolvimento orientado a testes (TDD) e automação de testes com Selenium, julgue os próximos itens.

No TDD, o primeiro passo do desenvolvedor é criar o teste, denominado teste falho, que retornará um erro, para, posteriormente, desenvolver o código e aprimorar a codificação do sistema.
Alternativas
Q351814 Programação
A respeito do Clean Code e de integração contínua, julgue os itens a seguir.

Os nomes de classes devem conter verbos, ao passo que os métodos devem ser indicados por substantivos.
Alternativas
Q351813 Engenharia de Software
A respeito do Clean Code e de integração contínua, julgue os itens a seguir.

São características de um servidor de integração contínua: compilação do código-fonte, realização de operações de checkout do gerenciador de configuração, execução de um conjunto de testes, auditoria do código-fonte e testes funcionais.
Alternativas
Q351812 Segurança da Informação
Acerca de assinatura e certificação digital, julgue os itens que se seguem.

A assinatura digital garante vínculo lógico entre o documento e a assinatura e possibilita a verificação da integridade do conteúdo assinado e a validação da identificação do assinante em conjunto com a certificação digital.
Alternativas
Q351811 Segurança da Informação
Acerca de assinatura e certificação digital, julgue os itens que se seguem.

A temporalidade permite comprovar a data e a hora de ocorrência de um evento eletrônico.
Alternativas
Q351810 Segurança da Informação
A respeito de criptografia, julgue os próximos itens.

No RSA (Rivest-Shamir-Adleman), o texto claro é criptografado em blocos com valor binário limitado.
Alternativas
Respostas
501: C
502: E
503: E
504: E
505: E
506: E
507: E
508: C
509: C
510: C
511: E
512: C
513: E
514: C
515: C
516: E
517: C
518: C
519: E
520: C