databases Online Quiz - 62

Description: databases Online Quiz - 62
Number of Questions: 20
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Tags: databases
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  1. All data rows are copied into temporary space

  2. Each data block for a table is read

  3. Each data row is accessed only one

  4. A random set of data blocks for a table is read

Correct Option: B,C
  1. When choosing a primary index you should pick a column with a severely limited value set

  2. If distribution is skewed an all-AMP operation will take longer than if all AMPs were evenly utilized

  3. Selecting a NUPI for storing data provides for maximum efficiency and makes the best use of the parallel features of Teradata

  4. The degree of uniqueness is not critical ot efficiency.

Correct Option: B
  1. Mature optimizer

  2. Industry standard access language(SQL)

  3. Concurrent users

  4. Parallel architecture

Correct Option: A,D
  1. Teradata Manager

  2. BTEQ

  3. Teradata SQL Assistant

  4. TDQM

Correct Option: D
  1. It is based on the Secondary Index

  2. It is based on the primary key of the table

  3. It is on the partitioning column

  4. It is based on the Primary Index of the table

Correct Option: D

A Partitioned Primary Index should be used for what two reasons? (Choose two)

  1. It is the Primary Key of the table, which guarantees uniqueness

  2. It allows instantaneous dropping of old data and rapid addition of new data

  3. It avoids full table scans without the overhead of a secondary index.

  4. It places all data in a specific range on the same AMP.

Correct Option: C,D

An example of an OLTP environment is _____

  1. creating a report to show a comparison of sales from this week to last week

  2. creating a report show how much credit can be extended to a customer

  3. creating a report that shows the top ten selling items across all stores for one year

  4. updating a checking account to reflect a deposit

Correct Option: D

When utilizing a unique secondary index, how may AMP (s) is usually accessed?

  1. All-AMP

  2. One-AMP

  3. Multi-AMP

  4. Two-AMP

Correct Option: D

How would you define a transaction?

  1. A logon, submittal of work, and logoff

  2. A single sql statement

  3. A logical unit or work

  4. A single sql, statement and the unit of recovery

Correct Option: C

Consider the emp table having columns empno, ename Which of the following SQL query fetches empno that occur more than twice in the emp table.

  1. select count() from emp group by empno having count() >2;

  2. select empno, count() from emp having count() >2;

  3. select empno, count() from emp where count() >2;

  4. select empno, count() from emp group by empno having count() >2;

Correct Option: D

In a database row is also called as

  1. Query

  2. Attribute

  3. Relation

  4. Record

Correct Option: D

While creating tables the concept that is used to reduce redundancy in data is called


  2. Aliases

  3. Sequence

  4. Normalization

Correct Option: D

A table T1 having 100 rows is joined with a table T2 with 50 rows without specifying the joined column in the where clause then result will have

  1. 100 rows

  2. 50 rows

  3. 150 rows

  4. 5000 rows

Correct Option: D

Which isolation level doesn't exists

  1. Isolation level2

  2. Isolation level3

  3. Isolation level4

  4. Isolation level1

Correct Option: C

Which normal forms require that non-key columns be functionally dependent solely on the primary key?

  1. Second

  2. Fifth

  3. Third

  4. None of above

Correct Option: C

Which of the following options is FALSE about unchained mode in ASE

  1. A commit tran is always implied for every transaction.

  2. Unchained mode is the default mode in ASE

  3. The server does not issue the begin tran implicity

  4. The value of @@tranchained is 0

Correct Option: A
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