| 1 |
In a relational database a single piece of information is called: |
- A. Table
- B. Record
- C. Entity
- D. Attribute
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| 2 |
Which of the following keys us not unique: |
- A. Candidate key
- B. Forein key
- C. Primary key
- D. Secondary key
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| 3 |
The relationship can be: |
- A. One-to-one
- B. One-to-many
- C. Many-to-many
- D. All
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| 4 |
An advantage of partitioning is: |
- A. Efficiency
- B. Extra space
- C. Reliabilty
- D. Accuracy
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| 5 |
In hybrid distribution, what types of fragments are stored at only one site? |
- A. Critical fragments
- B. Non-critical fragments
- C. Critical and non-critical fragments
- D. Only large fragments
|
| 6 |
Which of the following is NOT included in the definition of an entity? |
- A. Person
- B. Object
- C. Concept
- D. Action
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| 7 |
Conditional operator is also called: |
- A. True operator
- B. Ternary-operator
- C. Truth operator
- D. All of these
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| 8 |
Which of the following activities are involved in data analysis? |
- A. Data flow diagram
- B. Decision Tables
- C. Decision Trees
- D. All
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| 9 |
The output of the statement print ("%2f', 11.4519), is |
- A. 11.4519
- B. 11.45
- C. 11.51
- D. 11
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| 10 |
|
- A. mendatory
- B. optional
- C. may be many
- D. none of theses
|