Normalization interview questions

1. A.a constraint stating that one set of columns uniquely determines the value of another set
2. B.a system-generated identifier with no business meaning used as the primary key in place of real attributes
3. C.the rule requiring every column to hold a single atomic value with no repeating groups or arrays
4. D.a relationship where a non-key column determines another non-key column, which third normal form is designed to eliminate

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1. A.First normal form
2. B.Functional dependency
3. C.Denormalization
4. D.Second normal form

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1. A.First normal form — the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it
2. B.First normal form — the rule requiring every column to hold a single atomic value with no repeating groups or arrays
3. C.First normal form — a stricter refinement where every determinant of any dependency must itself be a candidate key
4. D.First normal form — the deliberate reintroduction of redundancy to speed reads at the cost of extra write and consistency effort

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1. A.a relationship where a non-key column determines another non-key column, which third normal form is designed to eliminate
2. B.a stricter refinement where every determinant of any dependency must itself be a candidate key
3. C.a system-generated identifier with no business meaning used as the primary key in place of real attributes
4. D.the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it

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1. A.Transitive dependency
2. B.Functional dependency
3. C.Boyce-Codd normal form
4. D.Second normal form

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1. A.Second normal form — the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it
2. B.Second normal form — a system-generated identifier with no business meaning used as the primary key in place of real attributes
3. C.Second normal form — a stricter refinement where every determinant of any dependency must itself be a candidate key
4. D.Second normal form — the deliberate reintroduction of redundancy to speed reads at the cost of extra write and consistency effort

Answer + AI explanation with Pro

1. A.the rule requiring every column to hold a single atomic value with no repeating groups or arrays
2. B.the rule that removes transitive dependencies so non-key columns depend only on the key and not on other non-key columns
3. C.a stricter refinement where every determinant of any dependency must itself be a candidate key
4. D.the deliberate reintroduction of redundancy to speed reads at the cost of extra write and consistency effort

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1. A.Second normal form
2. B.Third normal form
3. C.Functional dependency
4. D.Boyce-Codd normal form

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1. A.Third normal form — a stricter refinement where every determinant of any dependency must itself be a candidate key
2. B.Third normal form — the deliberate reintroduction of redundancy to speed reads at the cost of extra write and consistency effort
3. C.Third normal form — the rule that removes transitive dependencies so non-key columns depend only on the key and not on other non-key columns
4. D.Third normal form — a system-generated identifier with no business meaning used as the primary key in place of real attributes

Answer + AI explanation with Pro

1. A.the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it
2. B.a stricter refinement where every determinant of any dependency must itself be a candidate key
3. C.the rule requiring every column to hold a single atomic value with no repeating groups or arrays
4. D.a system-generated identifier with no business meaning used as the primary key in place of real attributes

Answer + AI explanation with Pro

1. A.Functional dependency
2. B.Boyce-Codd normal form
3. C.Transitive dependency
4. D.Third normal form

Answer + AI explanation with Pro

1. A.Boyce-Codd normal form — a stricter refinement where every determinant of any dependency must itself be a candidate key
2. B.Boyce-Codd normal form — the rule that removes transitive dependencies so non-key columns depend only on the key and not on other non-key columns
3. C.Boyce-Codd normal form — a relationship where a non-key column determines another non-key column, which third normal form is designed to eliminate
4. D.Boyce-Codd normal form — a system-generated identifier with no business meaning used as the primary key in place of real attributes

Answer + AI explanation with Pro

1. A.the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it
2. B.the deliberate reintroduction of redundancy to speed reads at the cost of extra write and consistency effort
3. C.a constraint stating that one set of columns uniquely determines the value of another set
4. D.the rule that removes transitive dependencies so non-key columns depend only on the key and not on other non-key columns

Answer + AI explanation with Pro

1. A.First normal form
2. B.Functional dependency
3. C.Surrogate key
4. D.Boyce-Codd normal form

Answer + AI explanation with Pro

1. A.Functional dependency — the rule that removes transitive dependencies so non-key columns depend only on the key and not on other non-key columns
2. B.Functional dependency — a stricter refinement where every determinant of any dependency must itself be a candidate key
3. C.Functional dependency — a constraint stating that one set of columns uniquely determines the value of another set
4. D.Functional dependency — a relationship where a non-key column determines another non-key column, which third normal form is designed to eliminate

Answer + AI explanation with Pro

1. A.a system-generated identifier with no business meaning used as the primary key in place of real attributes
2. B.the rule requiring every column to hold a single atomic value with no repeating groups or arrays
3. C.the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it
4. D.the deliberate reintroduction of redundancy to speed reads at the cost of extra write and consistency effort

Answer + AI explanation with Pro

1. A.First normal form
2. B.Denormalization
3. C.Boyce-Codd normal form
4. D.Transitive dependency

Answer + AI explanation with Pro

1. A.Denormalization — a constraint stating that one set of columns uniquely determines the value of another set
2. B.Denormalization — a system-generated identifier with no business meaning used as the primary key in place of real attributes
3. C.Denormalization — the deliberate reintroduction of redundancy to speed reads at the cost of extra write and consistency effort
4. D.Denormalization — the rule requiring every column to hold a single atomic value with no repeating groups or arrays

Answer + AI explanation with Pro

1. A.the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it
2. B.the rule requiring every column to hold a single atomic value with no repeating groups or arrays
3. C.a relationship where a non-key column determines another non-key column, which third normal form is designed to eliminate
4. D.a system-generated identifier with no business meaning used as the primary key in place of real attributes

Answer + AI explanation with Pro

1. A.Functional dependency
2. B.Surrogate key
3. C.Boyce-Codd normal form
4. D.First normal form

Answer + AI explanation with Pro

1. A.Surrogate key — the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it
2. B.Surrogate key — a constraint stating that one set of columns uniquely determines the value of another set
3. C.Surrogate key — a system-generated identifier with no business meaning used as the primary key in place of real attributes
4. D.Surrogate key — a stricter refinement where every determinant of any dependency must itself be a candidate key

Answer + AI explanation with Pro

1. A.a system-generated identifier with no business meaning used as the primary key in place of real attributes
2. B.the rule requiring every column to hold a single atomic value with no repeating groups or arrays
3. C.a relationship where a non-key column determines another non-key column, which third normal form is designed to eliminate
4. D.a constraint stating that one set of columns uniquely determines the value of another set

Answer + AI explanation with Pro

1. A.Transitive dependency
2. B.Functional dependency
3. C.Denormalization
4. D.Third normal form

Answer + AI explanation with Pro

1. A.Transitive dependency — the deliberate reintroduction of redundancy to speed reads at the cost of extra write and consistency effort
2. B.Transitive dependency — the rule that removes transitive dependencies so non-key columns depend only on the key and not on other non-key columns
3. C.Transitive dependency — a relationship where a non-key column determines another non-key column, which third normal form is designed to eliminate
4. D.Transitive dependency — the rule that, beyond atomicity, every non-key column must depend on the whole composite key rather than only part of it

Answer + AI explanation with Pro