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Database Management Systems

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Questions and Answers

What is the process of mapping a key value directly to the storage location without using indices called?

Hashing (correct)

Arithmetic manipulation

Indexing

Sequential mapping

What is the usual method of direct mapping in direct file organisations?

Using index entries

Performing arithmetic manipulation of the key value (correct)

Assigning to the next available free space

Storing in an overflow area

What is the term used for the situation when two or more distinct key values are mapped to the same value in hashing schemes?

Overflows

Re-organizations

Buckets

Collisions (correct)

How are colliding records usually handled in hashing schemes?

Assigned to an overflow area Signup and view all the answers

What is the purpose of using the hash function to generate a value that is the address of a bucket where the pair values of records are stored?

Handle limited collisions and re-organizations without affecting the hash function Signup and view all the answers

What is the term used to describe the situation when two or more distinct key values are mapped to the same value in hashing schemes?

Collision Signup and view all the answers

What is the purpose of using the hash function to generate a value that is the address of a bucket where the pair values of records are stored?

To efficiently locate the storage location of records Signup and view all the answers

What is the usual method of direct mapping in direct file organisations?

Performing arithmetic manipulation of the key value Signup and view all the answers

How are colliding records usually handled in hashing schemes?

Assigned to the next available free space or an overflow area Signup and view all the answers

What process is called when a key value is mapped directly to the storage location, avoiding the use of indices?

Hashing Signup and view all the answers

Database Management Systems

Choose a study mode

Podcast

Questions and Answers

What is the process of mapping a key value directly to the storage location without using indices called?

What is the usual method of direct mapping in direct file organisations?

What is the term used for the situation when two or more distinct key values are mapped to the same value in hashing schemes?

How are colliding records usually handled in hashing schemes?

What is the purpose of using the hash function to generate a value that is the address of a bucket where the pair values of records are stored?

What is the term used to describe the situation when two or more distinct key values are mapped to the same value in hashing schemes?

What is the purpose of using the hash function to generate a value that is the address of a bucket where the pair values of records are stored?

What is the usual method of direct mapping in direct file organisations?

How are colliding records usually handled in hashing schemes?

What process is called when a key value is mapped directly to the storage location, avoiding the use of indices?

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