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databases Online Quiz - 215

Description: databases Online Quiz - 215
Number of Questions: 20
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Tags: databases
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Is any modification in logical level should not affect the view level?

technology databases

  1. True

  2. False

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Correct Option: B

select the valid Definition Languages in DBMS:

technology databases

  1. Data Definition Language

  2. View Definition Language

  3. Query Definition Language

  4. Storage Definition Language

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Correct Option: A,B,D

Low-level instruction generated by compiler are executed by DDL Interpreter.(True/False)

technology databases

  1. True

  2. False

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Correct Option: B

Which one of the following does not help to maintain referential integrity?

technology databases

  1. Unique constraints

  2. Primary keys

  3. Cascading actions

  4. Foreign keys

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Correct Option: A

When is the authorization check on DB2 objects done?

technology databases

  1. at BIND time

  2. at RUN time

  3. at Execution time

  4. at End time

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Correct Option: B

What is a synonym?

technology databases

  1. A View of a table

  2. an alternate name for a table

  3. A Secondary table

  4. A Primary table

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Correct Option: A,B

What is index cardinality?

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  1. Number of distinct values a column contain

  2. Number of distinct values a column or columns contain

  3. Number of distinct values a row contain

  4. Number of distinct values a row or rows contain

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Correct Option: A,B

What is filter factor?

technology databases

  1. One divided by the number of distinct values of a column.

  2. Zero divided by the number of distinct values of a column.

  3. Zero divided by the number of distinct values of a row.

  4. One divided by the number of distinct values of a Rrow.

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Correct Option: A

What is referential integrity?

technology databases

  1. The relation of the primary key of a base table with foreign key of the reference table is known as referential integriety.

  2. The relation of the secondary key of a base table with foreign key of the reference table is known as referential integriety.

  3. The relation of the primary key of a secondary table with foreign key of the reference table is known as referential integriety.

  4. The relation of the primary key of a base table with index key of the reference table is known as referential integriety.

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Correct Option: A

What is FREEPAGE and PCTFREE in TABLESPACE creation?

technology databases

  1. PCTFREE: percentage of each page to be left free and FREEPAGE: Number of pages to be loaded with data between each free page.

  2. PCTFREE: percentage of each page to be loaded with data and FREEPAGE: Number of pages to be loaded with data between each free page.

  3. PCTFREE: percentage of each page to be left free and FREEPAGE: Number of pages to be left free with data between each loaded page.

  4. PCTFREE: percentage of each page to be loaded with data between each free page and FREEPAGE: Number of pages to be left free.

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Correct Option: A

What are the 4 environments which can access DB2?

technology databases

  1. TSO and CICS

  2. IMS and BATCH

  3. TSO, CICS, IMS and DB2

  4. TSO, CICS, IMS and VSAM

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Correct Option: A,B

When will you chose to run RUNSTATS?

technology databases

  1. After a load

  2. After mass updates

  3. After a deletes

  4. After a inserts

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Correct Option: A,B,C,D

Each PL/SQL block can have its own exception section

technology databases

  1. True

  2. False

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Correct Option: A

PL/SQL Exception message consists of

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  1. Type of Exception

  2. Finally block

  3. An Error Code

  4. A message

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Correct Option: A,C,D

Types of PL/SQL exceptions are

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  1. Named System Exceptions

  2. Unnamed System Exceptions

  3. Implicit Exceptions

  4. Explicit Exceptions

  5. User-defined Exceptions

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Correct Option: A,B,E

Named system exceptions are:

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  1. Not Declared explicitly

  2. Raised implicitly when a predefined Oracle error occurs

  3. caught by referencing the standard name within an exception-handling routine

  4. All of the above

  5. None of the above

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Correct Option: D

To handle the exception explicity, they must be declared using Pragma EXCEPTION_INIT

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  1. True

  2. False

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Correct Option: A

When you declare your own exception, you must ____ it explicitly

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  1. DECLARE

  2. RAISE

  3. PRAGMA

  4. INITIATE

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Correct Option: B

Run-time errors arise from

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  1. Hardware failures

  2. Design faults

  3. Coding mistakes

  4. None of the above

  5. All of the above

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Correct Option: E

___ exception is raised ___ whenever your PL/SQL program violates an Oracle rule or exceeds a system-dependent limit

technology databases

  1. internal, explicitly

  2. internal, implicitly

  3. user-defined, explicitly

  4. user-defined, implicitly

Show answer
Correct Option: B
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