In _____ method, the word is written to the block in both the cache and main memory, in parallel.
A. | Write through |
B. | Write back |
C. | Write protected |
D. | Direct mapping |
Option: A Explanation : Click on Discuss to view users comments. |
A. |
Objects in an object-oriented database contain not only data but also methods for processing the data.
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B. |
Object-oriented databases store computational instructions in the same place as the data.
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C. |
Object-oriented databases are more adapt at handling structured (analytical) data than relational databases.
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D. |
Object-oriented databases store more types of data than relational databases and access that data faster.
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Option: C Explanation : Click on Discuss to view users comments. |
In distributed databases, location transparency allows for database users, programmers and administrators to treat the data as if it is at one location. A SQL query with location transparency needs to specify :
A. | Inheritances |
B. | Fragments |
C. | Locations |
D. | Local formats |
Option: B Explanation : Click on Discuss to view users comments. |
A. | I, III and IV are the same query. |
B. | II, III and IV are the same query. |
C. | I, II and IV are the same query. |
D. | I, II and III are the same query. |
Option: D Explanation : Click on Discuss to view users comments. |
Which of the following statements is TRUE ?
D1 : The decomposition of the schema R(A, B, C) into R1(A, B) and R2 (A, C) is always lossless.
D2 : The decomposition of the schema R(A, B, C, D, E) having AD → B, C → DE,
B → AE and AE → C, into R1 (A, B, D) and R2 (A, C, D, E) is lossless.
A. | Both D1 and D2 |
B. | Neither D1 nor D2 |
C. | Only D1 |
D. | Only D2 |
Option: D Explanation : Click on Discuss to view users comments. |