Bissoy.com
Doctors Medicines MCQs Q&A

Which one is an entity?

Which one is an entity? Correct Answer Student

বাস্তব অথবা অবাস্তব বস্তুর আদর্শ শ্রেণিকরণ এর জন্য প্রয়োজনীয় প্রধান একক হল এনটিটি। এনটিটির বাস্তব উপস্থিতি থাকতে পারে অথবা এটি শুধুমাত্র ধারণার উপর ভিত্তি করে হতে পারে। রিডিং রুম, চেয়ার, পাঠ্যসূচি, দেশ, জাতি, ছাত্র - শিক্ষক ইত্যাদি ডেটা এনটিটি'র উদাহরণ। অবশ্যই এনটিটির কিছু বৈশিষ্ট্য থাকবে। যেমন ছাত্র একটি এনটিটি, যার বৈশিষ্ট্য হলো ছাত্রের রোল নং, বয়স, শ্রেণি ইত্যাদি

Related Questions

An entity in A is associated with at most one entity in B, and an entity in B is associated with at most one entity in A.This is called as
In an Entity-Relationship (ER) model, suppose ? is a many-to-one relationship from entity set E1 to entity set E2. Assume that E1 and E2 participate totally in ? and that the cardinality of E1 is greater than the cardinality of E2. Which one of the following is true about ??
Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?
An entity in A is associated with at most one entity in B. An entity in B, however, can be associated with any number (zero or more) of entities in A.
If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has
If an entity adheres to the disjoint rule, then an entity instance can be a member of more than one entity for a given supertype.
Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?
Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.
A strong entity is an entity whose existence depends on some other entity type.