Questões de Concurso
Comentadas para técnico judiciário - tecnologia da informação
Foram encontradas 1.029 questões
Resolva questões gratuitamente!
Junte-se a mais de 4 milhões de concurseiros!
A opção hbm2ddl.auto no arquivo hibernate.cfg.xml habilita a geração automática de esquemas da base de dados diretamente na base de dados. Essa opção pode ser naturalmente desligada apenas por meio da remoção da opção de configuração.
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.
Based on the text above, judge the following item.
Systems that use time-sharing are not considered to be multiuser systems, since they do not allow the simultaneous access of several users to a computer.
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.
Based on the text above, judge the following item.
When a distributed operating system is used for managing several independent computers, this group of computers appears to behave like a single computer.
Entre os periféricos de entrada e saída de dados, inclui-se a porta USB.
Leia as afirmações abaixo a respeito da pontuação do 2º parágrafo. I. A vírgula imediatamente após “anos” tem por função separar dois segmentos de função sintática semelhante no período. II. A vírgula imediatamente após “cordéis” justifica-se pelo fato de que todo o trecho anterior a ela, de caráter adverbial, antecede a oração principal. III. Imediatamente após o termo “rompidos” pode-se acrescentar uma vírgula, uma vez que separaria orações de sujeitos diferentes.
Está correto o que se afirma em
Um arquivo com extensão PPS representa um conjunto de slides de apresentação que pode ser editado pelo programa Microsoft PowerPoint, ou seja, o arquivo pode ser aberto no modo normal e alterado livremente pelo usuário.
As unidades de armazenamento que representam memórias permanentes do computador são identificadas, no Windows, por uma letra seguida do sinal de dois-pontos, como C:, A:, D: etc.
Ao se iniciar uma fórmula no MS Excel com o sinal de =, indica-se que o conteúdo de determinada célula será um cálculo, cujas operações, se houver vários operadores aritméticos, serão resolvidas na seguinte sequência: potenciação, multiplicação e divisão, adição e subtração, respectivamente. O uso de parênteses pode alterar a sequência de resolução de uma operação.
I é um comando importante para o gerenciamento de processos, pois por intermédio dele é possível saber quais os processos encontram-se em execução. Quando acompanhado do parâmetro KK II exibe o nome do usuário que iniciou determinado processo e a hora em que isso ocorreu e, com o acréscimo do parâmetro KK
III mostra os processos que não estão associados a terminais.
Preenchem correta e respectivamente as lacunas I, II e III: