2017-10-25
1991
A one - two - one
110. This mathematical class consist operations which are used to manipulate relations in a relational data model: Relational algebra
111. … is equivalent with the number of attributes of that relation: A relation degree
112. It is equivalent with the number of tuples of that relatio: A relation cardinality
113. Each field has a unique … that describes its contents: Field name
114. What is a set of atomic values that are all of the same typе: A domain
115. What is an ordered set of values that describe data characteristics at one moment in time: Turple
116. The relational data model uses … to define identifiers for a relation’s tuples: Keys
116. What is a candidate key that is chosen to represent the relation in the database and to provide a way to uniquely identify each tuple of the relation: Primary key
117. It is an attribute (or attribute combination) in one relation R2 whose values are required to match those of the primary key of some relation R1: Foreign key
118. The basic logical structure of this model is represented by an upside-down tr: The hierarchical model
119. Each parent for the relational model can have many children, and each child has … parent(s). One
120. The tasks associated with creating, maintaining, and accessing the information in databases are referred to as …: All answers are correct
121. This query is used to extract information from a database: SELECT
122. … is a tool for processing information - a wide range of products, software and services that are used for production, storage, processing, distribution and exchange of information.
ICT
123. You always get the same result for the same process when using a computer. This advantage of computers called …
Consistency
124. Improper and prolonged use of a computer might lead to disorders or injuries of the elbows, wrist, neck, back, and eyes. This disadvantage of computers called …
Health Risk
125. When using the Internet on your computer, you run the risk of leaking your private information. This disadvantage of computers called …
Violence of privacy
126. Manufacturing process of computers and computer waste are harmful to the environment. This disadvantage of computers called …
Impact on Environment
127. Disposed computers could also cause fire. This disadvantage of computers called …
Impact on Environment
128. Data stored in a computer can be lost or compromised in a number of ways. This disadvantage of computers called …
Data security
129. Use computers without positive purpose. This disadvantage of computers called …
Wasting of time and energy
130. Use the computer for negative activities. This disadvantage of computers called …
Computer crimes
131. The computing systems store, present, and help us modify:
Text, audio, images and graphics, video
Computerized representations of models and attributes of real or simulated entities. It is -
Data
133. Data that represents the results of a computational process. It is …
Information
134. Data that represents the results of some process, such as perception, learning, association, and reasoning. It is …
Knowledge
135. Data is collected and given to the computer for processing. It is …
Information processing cycle
136. The information is given to the user as …
Output
137. … is a continuous representation, analogous to the actual information it represents.
Analog data
138. … is a discrete representation, breaking the information up into separate (discrete) elements.
Digital data
Computing systems are...
Finite machines
The devices that store and manage the digital data are far less expensive and complex for...
Binary representation
