Information Technologies

Yanıt Açıklaması: The most prominent characteristics of Operating Systems can be summarized as follows: • Memory Management • Processor Management • File Management • Device Management • Protection and Security Therefore, the correct option is D.

Yanıt Açıklaması: Master data is a data that describes core entities for an enterprise such as customers, assets, employees and so on. Master data management is a set of tasks, such as governing, controlling master data and so on. Master data management provides sharing data among departments and employees.

Yanıt Açıklaması: Mining of Frequent Patterns is the process of mining patterns that frequently occurs in data. Data can be described with classes or concepts. These descriptions are inferred with data characterization and data discrimination. Data characterization is the process of summarizing the general properties of a class whereas data discrimination is the process of comparing class properties with features of other one or more classes. Association is referred as patterns frequently purchased together. Mining association is the process of discovering relations among data. Correlations represent relations between items or their attributes. Two items can be positively or negatively correlated. Moreover, there may be no correlation between two items as a result of mining correlation. Clustering brings together similar objects which do not have a class label. Therefore, the correct option is E.

Yanıt Açıklaması: In general, computers can perform three basic operations. Firstly, they accept data (input) from users via various input devices. Secondly, they process the data. Finally, they store the processed data in a memory or transfer it to various output devices in the desired format (text, image, audio, video, etc.). "Heating" is not among the basic operations that computers can perform, so the answer is D.

Yanıt Açıklaması: Mapping 1:1 binary relationship types: There are three possible ways to be followed while mapping 1:1 binary relationship type R relating two entity types concept to relational design. One of the choices is foreign key approach where primary key of one of the entities is inserted to the other entity type’s relation as foreign key. Merging relation approach is valid when both entity types are total participated in R. This time, two different entity types are merged into one relation. As a third choice, a relationship is created where primary keys of two entity types are used as foreign keys. One of those foreign keys are chosen as primary key of R.

Yanıt Açıklaması: The main objectives of the operating system can be summarized as follows: • Enables the users to use computer in a convenient and efficient manner • Hides complexity of the hardware resources from the users • Acts as an intermediary between the computer hardware and its users • Manages the resources of a computer system • To keep track of who is using which resource, granting resource requests, according for resource using and mediating conflicting requests from different programs and users • Provides efficient and fair sharing of resources among users and programs

Yanıt Açıklaması: Application is usually more interactive compared to system software. This is a salient feature of application software, as application software is a computer program designed to help people perform an activity while system software is more related to the operation of the actual computer.

Yanıt Açıklaması: Managing data is important and provides some advantages described as follows: • It provides mechanisms to become data into accessible, reliable, authentic and complete form. • Itprovides mechanisms to securely share data between information technology systems, applications, departments or employees for an enterprise. • It helps decision makers to make strategic decisions by allowing mining and analyzing data. • It allows organizing, tracking, deleting, creating, and reporting data. • It disallows redundancy and loss in data. • It minimizes damage caused by errors related with data.

Yanıt Açıklaması: Denial-of-Service (DoS) attacks aim to prevent normal functioning of a computer system. DoS attacks usually flood the network with traffic until a shutdown occurs due to the overload. Thus, the correct answer is A.

Yanıt Açıklaması: In design stage, the solution system is defined based on the requirements and analysis decision. The correct answer is C.

Yanıt Açıklaması: A metropolitan area network (MAN) is a computer network that usually covers a campus or a city.D is the correct answer.

Yanıt Açıklaması: Data needs to be defined , its structure must be described. Data is stored to databases for online transactional purposes, creating, modifying, deleting, retrieving data. Data warehousing keeps historical data for preprocessing, mining, analyzing, reporting data. Data security topics such as accessing to data, privacy of data, erasing data must be managed . Data quality is important for decision-making. Data quality must be managed since data quality affects quality of extracted knowledge. Data architecture is the set of rules, models, methodologies to determine data flow for enterprises’ applications, to manage data in rest for enterprises’ information technology systems and so on. Data architecture must be managed to design, deploy and modify it. Therefore, the correct option is D.

Yanıt Açıklaması: Classification is the process of understanding data classes or concepts. Class labels of data are given for purpose of classification.

Yanıt Açıklaması: In base 16 (hexadecimal), the number system consists of 16 digits: 0 through 9 and A for 10, B for 11, C for 12, D for 13, E for 14, F for 15.

Yanıt Açıklaması: Computer networks allow the users to: • Exchange and share data and files • Communicate with each other via e-mails, video calls, instant messaging, etc. • Share a hardware resource such as a printer or a scanner • Share Internet connections • Store and access data centrally D is the correct answer.

Yanıt Açıklaması: Conceptual design provides the conceptual schema of a database by representing entities and relationships. Logical design is a more precise map of the entity relationships, providing a relational schema of the database. The correct answer is D.

Yanıt Açıklaması: ASCII (American Standard Code for Information Interchange) code is used to represent information such as character-based data. ASCII code includes 94 characters that consists of 26 uppercase letters, 26 lowercase letters, 10 numerals, and 32 special characters. Besides, 34 characters are used for various control functions. The correct option is E.

Yanıt Açıklaması: A modem is a device that serves as a bridge between a local network and the Internet. The primary function of a modem is to convert between analog and digital data in real time. Therefore, the correct option is B.

Yanıt Açıklaması: Software is a set of instructions that enables the user to interact with a computer, its hardware, or perform tasks. Software is designed to enable a computer to perform a well-defined function. A device driver is a system software that operates or controls a particular hardware device (e.g., graphic card, printer, scanner, etc.) that is connected to a computer. It allows a computer to communicate with these internal or external peripheral devices. Firmware is a small and permanent software programmed into a read-only memory. An operating system is a program that manages the computer hardware. It provides an container environment in which other programs can work. Booting is the process of starting or restarting a computer. The correct answer is A.

Yanıt Açıklaması: Application Software is Close to user Slow in speed Easy to design Easy to understand More interactive Bigger in size (requires large storage space) Easy to manipulate and use Generally written in high-level language