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databases Online Quiz - 183

Description: databases Online Quiz - 183
Number of Questions: 20
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Tags: databases
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Hibernate works best if these classes follow some simple rules, also known as the ___________ programming model.

  1. Perform Object Java Oriented

  2. Plain Object Java Old

  3. Platform Oriented Java Object

  4. Plain Old Java Object


Correct Option: D

Examine this TRUNCATE TABLE command: - 68 - TRUNCATE TABLE departments; Which statements are true about the command?

  1. All extents are released.

  2. All rows of the table are deleted.

  3. Any associated indexes are truncated.

  4. No undo data is generated for the table's rows.


Correct Option: B,C,D

Which two statements are true about rebuilding an index?

  1. The resulting index may contain deleted entries.

  2. A new index is built using an existing index as the data source.

  3. Queries cannot use the existing index while the new index is being built.

  4. During a rebuild, sufficient space is needed to accommodate both the old and the new


Correct Option: B,D

Which method is correct for starting an instance to create a database?

  1. STARTUP

  2. STARTUP OPEN

  3. STARTUP MOUNT

  4. STARTUP NOMOUNT


Correct Option: D

Which data dictionary view shows the available free space in a certain tablespace?

  1. DBA_EXTENTS

  2. V$FREESPACE

  3. DBA_FREE_SPACE

  4. DBA_FREE_EXTENTS


Correct Option: C
  1. Connection Management

  2. Bean Management

  3. Transaction Management

  4. Object relational mapping

  5. Relational Management


Correct Option: A,C,D

A CLOB (character large object) data type store upto____character?

  1. 1,147,483,647

  2. 2,147,483,647

  3. 3,147,483,647

  4. 4,147,483,647


Correct Option: B

How many defaults can be placed on one column of a Table?

  1. 50

  2. up to 1000

  3. 10,000

  4. N number


Correct Option: D

What is the difference between GROUP BY and ORDER BY clause in SQL?

  1. GROUP BY controls presentation of rows and ORDER BY controls presentation of columns for results of SELECT statement

  2. GROUP BY controls presentation of columns and ORDER BY controls presentation of rows for results of SELECT statement

  3. GROUP BY orders rows in query's return and ORDER BY orders columns in query's return

  4. none


Correct Option: A

How we will browse IMS data Base

  1. FILE AID

  2. BIND

  3. PLAN

  4. NONE


Correct Option: A

IS IT POSSIBLE TO UPDATE KEY FIELD OF A SEGMENT?

  1. True

  2. False


Correct Option: A

WHAT ARE THE CONTROL BLOCKS IN IMS DB?

  1. DBD

  2. PSB

  3. PCB

  4. IMSCB


Correct Option: A,B,C

IS IT POSSIBLE A SEGMENT WITH OUT PARENT?

  1. True

  2. False


Correct Option: A

WHICH FIELD IS USED TO IDENTIFY THE OCCURENCE OF THE SEGMENT?

  1. SEARCH FIELD

  2. KEY FIELD

  3. BOTH

  4. NONE


Correct Option: B

What are the processing modes available in IMS DB?

  1. BATCH DL/I

  2. MPP

  3. BMP

  4. ALL


Correct Option: D
  1. 15

  2. 255

  3. 1

  4. NO LIMITATIONS


Correct Option: D

MAXIMUM NUMBER OF FIELDS ALLOWED PER SEGMENT?

  1. 15

  2. 255

  3. 1000

  4. 1


Correct Option: B
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