Questões de Concurso Para cops-uel

Sobre a substituição, sem prejuízo do sentido original, dos termos “preterido” (linha 1), “repúdio” (linha 10), “incidência” (linha 14) e “represálias” (linha 23), considere as afirmativas a seguir.

I. “preterido” pode ser substituído por “desfavorecido”.

II. “repúdio” pode ser substituído por “reiteração”.

III. “incidência” pode ser substituído por “intermitência”.

IV. “represálias” pode ser substituído por “retaliações”.

Assinale a alternativa correta.

Nowadays the relational model is the primary data model for commercial data-processing applications mainly due to its simplicity, which eases the programmer’s job, when compared to earlier data models such as the network model or the hierarchical model.

Regarding the structure of relational databases, match the column 1 with the one 2.

Column 1

(I) Relation.

(II) Tuple. 

(III) Attribute. 

(IV) Table. 

(V) Domain.

Column 2

(A) It refers to a row. 

(B) It refers to permitted values.

(C) It refers to a table.

(D) It refers to a column.

(E) It has a single name.

Choose the alternative with the right association.

A structural problem for digital signatures is that everyone has to agree to trust a central authority that knows everything and is trusted by everyone. The most logical candidates for central authority are the government, the banks, the accountants, and the lawyers. Unfortunately, none of these organizations inspire total confidence in all citizens. Hence, it would be nice if signing documents did not require a trusted authority. Fortunately, Public-key cryptography can make an important contribution to the improvement of digital signature security, allowing person A to send a digital signed message to person B without requiring a central authority.

Considering that person A has the private-key D_A and the public-key E_A and person B has the private-key D_B and public-key E_B, choose the alternative that shows the correct sequence of utilization of the keys when person A signs a message M, sends it to B and B checks he signature.

Consider the following statements about object-oriented programming.

I. Using different names for operations in the same types is called overloading.

II. Overloaded operators are useful to add functions to enable conventional notation.

III. A derived class is said to inherit properties from its base, so the relationship is also called inheritance.

IV. Pointers to functions can be used to provide a simple form of polymorphic routines.

Choose the right alternative.

Some Intel processors provide hardware-assisted virtualization to improve the fundamental flexibility and robustness of traditional software-based virtualization solutions by accelerating key functions of the virtualized platform.

About hardware-assisted virtualization, consider the following statements.

I. It enables the VMM to share I/O devices with several guest OSs at the same time.

II. It speeds up the transfer of platform control between the guest operating systems (OSs) and the virtual machine manager (VMM)/hypervisor.

III. It optimizes the network for virtualization with adapter-based acceleration.

IV. It is used in data centers for disaster recovery, high availability and business continuity, and in desktops to increase flexibility, improve security, and reduce costs.

Choose the correct alternative.