Relational Database Management System Mcqs

Page No. 30

The linked list formed by the deleted records is called as ______


aDelete list

✖


bFree list

✓


cNull list

✖


dNon-existent list

✖


View Answer Free list

State true or False: Variable length records cannot be implemented


aTrue

✖


bFalse

✓


ceither true of false

✖


dnone of these

✖


View Answer False

What does a null bitmap indicate?


aThe database does not exist

✖


b The record does not exist

✖


cThe attributes of a record do not have a value

✓


dThe attributes are missing from record

✖



How can variable length records arise in a file


aStorage of multiple record types in a file

✖


bRecord types that allow variable lengths for one or more fields

✖


cRecord types that allow repeating fields, such as arrays or multisets

✖


d All of the mentioned

✓



Which of the following is true about file header?


aIt is allocated at the beginning of the file

✖


bIt has information about the file

✖


cIt generally contains the address of the first record in it

✖


dAll of the mentioned

✓


View Answer All of the mentioned

The devices that store a lot of optical disks are called as


aOptical reservoirs

✖


bJukeboxes

✓


c Karaoke machines

✖


dSequential access machines

✖


View Answer Jukeboxes

hat is the approximate storage capacity of CDs in MB


a300

✖


b700

✓


c1100

✖


d1500

✖


View Answer 700

What is the full form of LRU (in buffer replacement strategy)?


aLeast Reactive User

✖


bLeast Recently Used

✓


cLeast Read URL

✖


dLowest Reading User

✖


View Answer Least Recently Used

The subsystem responsible for the allocation of buffer space is called as _______


aBuffer allocator

✖


b Buffer manager

✓


cBuffer enhancer

✖


dBuffer intermediary

✖


View Answer Buffer manager

Which of the following need to be stored in the data dictionary?


aName of the relation

✖


b Domains and lengths of attributes

✖


cIntegrity constraints

✖


dAll of the mentioned

✓


View Answer All of the mentioned

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