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JDBC, Java Server Pages, and MySQL
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Question
What MySQL property is used to create a surrogate key in MySQL?
Options
A. UNIQUE
B. SEQUENCE
C. AUTO_INCREMENT
D. None of the above -- Surrogate keys are not implemented in MySQL.
Correct Answer
AUTO_INCREMENT
More questions
1. An applet is a Java bytecode program that is sent to the user via HTTP and is invoked using the HTTP protocol on the user's computer.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
2. Oracle commands, column names, table names, view names and all other database elements are case sensitive.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
3. When you type Start FILENAME, the statement in your file will be executed automatically.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
4. If there is only one statement and no ambiguity about what is wanted, Oracle will treat the semicolon and slash as the same.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
5. All enterprise resource planning (ERP) systems are heavily dependent on databases to store the data required by the ERP applications.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
6. An object can have which of the following multiplicities?
Options
A. Zero
B. One
C. More than one
D. All of the above.
Show Answer
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Discuss
Correct Answer: All of the above.
7. A supertype/subtype hierarchy is which of the following?
Options
A. Each subtype has only one attribute.
B. Each supertype has only one attribute.
C. Each subtype has only one supertype.
D. Each supertype has only one subtype.
Show Answer
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Correct Answer: Each subtype has only one supertype.
8. What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary?
Options
A. VARCHAR2
B. CHAR
C. LONG
D. NUMBER
Show Answer
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Correct Answer: VARCHAR2
9. A multidimensional database model is used most often in which of the following models?
Options
A. Data warehouse
B. Relational
C. Hierarchical
D. Network
Show Answer
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Discuss
Correct Answer: Data warehouse
10. Replication should be used when which of the following exist?
Options
A. When transmission speeds and capacity in a network prohibit frequent refreshing of large tables.
B. When using many nodes with different operating systems and DBMSs and database designs.
C. The application's data can be somewhat out-of-date.
D. All of the above.
Show Answer
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Discuss
Correct Answer: The application's data can be somewhat out-of-date.
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