Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Which of the following statements is FALSE ab...
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Which of the following statements is FALSE about weak entity set?
- a)Weak entities can be deleted automatically when their strong entity is deleted.
- b)Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.
- c)A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included.
- d)Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Which of the following statements is FALSE about weak entity set?a)Wea...
- Weak entities can be deleted automatically when their strong entity is deleted. Correct
- Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity. Correct
- A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are includedCorrect
- Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.This is Incorrect, because tuples in a weak entity set are partitioned according to their relationship with tuples in a strong entity set.
So, option (D) is correct.
Most Upvoted Answer
Which of the following statements is FALSE about weak entity set?a)Wea...
False Statement: Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.
Explanation:
To understand why this statement is false, let's first review what a weak entity set is.
A weak entity set is an entity set that does not have sufficient attributes to form a primary key on its own. It depends on another entity set, called the strong entity set, for its existence. The weak entity set has a partial key, which is derived from the attributes of the strong entity set it depends on.
Now, let's break down the false statement into two parts:
1. Tuples in a weak entity set are not partitioned: This part of the statement implies that the tuples in a weak entity set are not grouped or organized based on their relationship with tuples in a strong entity set. However, this is not true. Tuples in a weak entity set are indeed partitioned or grouped according to their relationship with tuples in a strong entity set. This partitioning is done based on the partial key of the weak entity set, which is derived from the strong entity set it depends on.
2. According to their relationship with tuples in a strong entity set: This part of the statement emphasizes that the partitioning is based on the relationship with tuples in a strong entity set. This is also incorrect because the partitioning is not based on the relationship with tuples in the strong entity set, but rather on the partial key of the weak entity set. The partial key identifies the specific strong entity instance that the weak entity instance depends on.
Therefore, the false statement suggests that tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set, which is incorrect. The tuples in a weak entity set are indeed partitioned based on their relationship with tuples in the strong entity set through the usage of a partial key.
Explanation:
To understand why this statement is false, let's first review what a weak entity set is.
A weak entity set is an entity set that does not have sufficient attributes to form a primary key on its own. It depends on another entity set, called the strong entity set, for its existence. The weak entity set has a partial key, which is derived from the attributes of the strong entity set it depends on.
Now, let's break down the false statement into two parts:
1. Tuples in a weak entity set are not partitioned: This part of the statement implies that the tuples in a weak entity set are not grouped or organized based on their relationship with tuples in a strong entity set. However, this is not true. Tuples in a weak entity set are indeed partitioned or grouped according to their relationship with tuples in a strong entity set. This partitioning is done based on the partial key of the weak entity set, which is derived from the strong entity set it depends on.
2. According to their relationship with tuples in a strong entity set: This part of the statement emphasizes that the partitioning is based on the relationship with tuples in a strong entity set. This is also incorrect because the partitioning is not based on the relationship with tuples in the strong entity set, but rather on the partial key of the weak entity set. The partial key identifies the specific strong entity instance that the weak entity instance depends on.
Therefore, the false statement suggests that tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set, which is incorrect. The tuples in a weak entity set are indeed partitioned based on their relationship with tuples in the strong entity set through the usage of a partial key.
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Which of the following statements is FALSE about weak entity set?a)Weak entities can be deleted automatically when their strong entity is deleted.b)Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.c)A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included.d)Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements is FALSE about weak entity set?a)Weak entities can be deleted automatically when their strong entity is deleted.b)Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.c)A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included.d)Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.Correct answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the following statements is FALSE about weak entity set?a)Weak entities can be deleted automatically when their strong entity is deleted.b)Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.c)A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included.d)Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is FALSE about weak entity set?a)Weak entities can be deleted automatically when their strong entity is deleted.b)Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.c)A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included.d)Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.Correct answer is option 'D'. Can you explain this answer?.
Which of the following statements is FALSE about weak entity set?a)Weak entities can be deleted automatically when their strong entity is deleted.b)Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.c)A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included.d)Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.Correct answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the following statements is FALSE about weak entity set?a)Weak entities can be deleted automatically when their strong entity is deleted.b)Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.c)A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included.d)Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is FALSE about weak entity set?a)Weak entities can be deleted automatically when their strong entity is deleted.b)Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.c)A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included.d)Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.Correct answer is option 'D'. Can you explain this answer?.
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