When might an index slow down the overall performance of the database? Choose the best answer....
When might an index slow down the overall performance of the database? Choose the best answer.
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A. If there are no inserts |
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B. If there are many inserts |
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C. If the underlying relation is not sorted |
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D. If it is a primary index |
Homework Answers
Q) When might an index slow down the overall performance of the database?
A) B) If there are many inserts. Because
Execution of a SELECT statement, inserting, updating and deleting records is in most cases slower on a heap table than on a clustered one.
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When might an index slow down the overall performance of the
database? Choose the best answer....
please do them all Choose 19. Choose best answer from drop-down menu: 3 points Calculate Ecell...
please
do them all
Choose 19. Choose best answer from drop-down menu: 3 points Calculate Ecell for the reaction 2 given the Ecell of reaction 1, Reaction 1: 2 Cr2+ + Cl2(g) → 2Cr3+ + 2C1 Reaction 2: Cr3+ + CH → Cr2+ + 1/2 Cl2(g) Ecell = 1.78 V Ecell = ? Choose 20. Choose best answer from drop-down menu: 2 points Consider the following standard reduction potentials in acid solution: E°(V) AP+ + 3e → Als) -1.66 AgBro+e...
23. Choose best answer from drop-down menu: 2 points As a result of alpha emission, the...
23. Choose best answer from drop-down menu: 2 points As a result of alpha emission, the product nucleus is Choose 24. Choose best answer from drop-down menu: 2 points When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is also formed? He + Be on + - A) 12C B) Li C) 8Li D) 19B E) 1B Choose 25. Choose best answer from drop-down menu: 2 points Consider the reaction below: Cr3+ + H20+...
QUESTION 1 What is the most common relationship within a relational database? Select the best answer...
QUESTION 1 What is the most common relationship within a relational database? Select the best answer from the following. One-To-One relationship. o One-To-Many relationship. Many-To-Many relationship. Zero-To-Zero relationship. QUESTION 2 What is an "entity'? Select the best answer from the following. An entity, for our purposes, is the same as a table in the database. An entity represents one of the columns in an individual table. There are no entities in a relational database. Entities are only part of NoSQL...
24. Incident reports are needed when... (Choose the best answer ) A. A resident falls B....
24. Incident reports are needed when... (Choose the best answer ) A. A resident falls B. Something broken or damaged by resident C. Something is broken or damaged by member of health care team D. All of the following are true. 25. Involves the storing of information in the brain for later use and the ability to recall the information when needed, is the definition of which of the following A. Reacting B. Reactive C. Memory D. Flux when aging...
17. Choose best answer from drop-down menu: 2 points Which of the following is true concerning...
17. Choose best answer from drop-down menu: 2 points Which of the following is true concerning a galvanic cell? Oxidation occurs at the anode and is where anions move towards Oxidation occurs at the cathode and is where anions move towards Oxidation occurs at the anode and is where cations move towards Oxidation occurs at the cathode and is where cations move towards Reduction occurs at the anode and is where anions move towards Choose 18. Choose best answer from...
subject. Database system i need the answer for 8 & 9 please. 8. Improve the performance and backup plan for the CUNY database. This database student records enrolled in 24 Colleges. Propose...
subject. Database system
i need the answer for 8 & 9 please.
8. Improve the performance and backup plan for the CUNY database. This database student records enrolled in 24 Colleges. Propose four recommendations to correct or ems identified. You have no budget to purchase additional hardware. You need to make recommendations using hardware already available (15 points) includes 400,000 You will be evaluated based on your improvements in a) performance, b) security, c) backup and d) hardware utilization. You...
26. Choose best answer from drop-down menu: 2 points Radium-226 decays by alpha emission. What is...
26. Choose best answer from drop-down menu: 2 points Radium-226 decays by alpha emission. What is its decay product? B) 486 A) 229Fr C) 230Th 2264 D) E) 234Po Choose 27. Choose best answer from drop-down menu: 2 points Which is a balanced nuclear equation representing the beta emission of iodine-131? A) " 131 53 131 541 Xe + OB 131 151 Sb + He 33 B) C) 331 + B 131 Te 52 131 D) 1 13, Te +...
2. Choose best answer from drop-down menu: 2 points If AGº for a reaction is greater...
2. Choose best answer from drop-down menu: 2 points If AGº for a reaction is greater than zero, then Pick the choice that BEST fills in the blank. Choose 3. Choose best answer from drop-down menu: 2 points For a given reaction at equilibrium, AH = -19.9 kJ/mol and AS = -55.5 J/K-mol. The reaction will have at a temperature of Choose 4. Choose best answer from drop-down menu Consider a process for which AH = 211 kJ and AS...
19. Choose best answer from drop-down menu: 3 points Calculate Ecell for the reaction 2 given...
19. Choose best answer from drop-down menu: 3 points Calculate Ecell for the reaction 2 given the Ecell of reaction 1, Reaction 1: 2 Cr2+ + Cl2(g) → 2Cr3+ + 2CH Reaction 2: Cr3+ + C + Cr2+ + 1/2 Cl2(g) Ecell = 1.78 V Ecell = ? Choose 20. Choose best answer from drop-down menu: 2 points Consider the following standard reduction potentials in acid solution: E°(V) AP+ + 3e → Als) -1.66 AgBr.) + e + Agos) +...
1.) Why might the profitability index be preferable over the NPV method when analyzing capital investments?...
1.) Why might the profitability index be preferable over the NPV method when analyzing capital investments? 2.) "All costs (past, present, future, variable and fixed) are relevant when making a decision between two alternatives”. Is this true or false? Why or why not? 3.) The current ratio assesses a business’s a. Liquidity b. Profitability c. Market performance d. None of the above 4.) Which of the following is an example of a cost that is variable with respect to the...
please
do them all
Choose 19. Choose best answer from drop-down menu: 3 points Calculate Ecell for the reaction 2 given the Ecell of reaction 1, Reaction 1: 2 Cr2+ + Cl2(g) → 2Cr3+ + 2C1 Reaction 2: Cr3+ + CH → Cr2+ + 1/2 Cl2(g) Ecell = 1.78 V Ecell = ? Choose 20. Choose best answer from drop-down menu: 2 points Consider the following standard reduction potentials in acid solution: E°(V) AP+ + 3e → Als) -1.66 AgBro+e...
23. Choose best answer from drop-down menu: 2 points As a result of alpha emission, the product nucleus is Choose 24. Choose best answer from drop-down menu: 2 points When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is also formed? He + Be on + - A) 12C B) Li C) 8Li D) 19B E) 1B Choose 25. Choose best answer from drop-down menu: 2 points Consider the reaction below: Cr3+ + H20+...
QUESTION 1 What is the most common relationship within a relational database? Select the best answer from the following. One-To-One relationship. o One-To-Many relationship. Many-To-Many relationship. Zero-To-Zero relationship. QUESTION 2 What is an "entity'? Select the best answer from the following. An entity, for our purposes, is the same as a table in the database. An entity represents one of the columns in an individual table. There are no entities in a relational database. Entities are only part of NoSQL...
24. Incident reports are needed when... (Choose the best answer ) A. A resident falls B. Something broken or damaged by resident C. Something is broken or damaged by member of health care team D. All of the following are true. 25. Involves the storing of information in the brain for later use and the ability to recall the information when needed, is the definition of which of the following A. Reacting B. Reactive C. Memory D. Flux when aging...
17. Choose best answer from drop-down menu: 2 points Which of the following is true concerning a galvanic cell? Oxidation occurs at the anode and is where anions move towards Oxidation occurs at the cathode and is where anions move towards Oxidation occurs at the anode and is where cations move towards Oxidation occurs at the cathode and is where cations move towards Reduction occurs at the anode and is where anions move towards Choose 18. Choose best answer from...
subject. Database system
i need the answer for 8 & 9 please.
8. Improve the performance and backup plan for the CUNY database. This database student records enrolled in 24 Colleges. Propose four recommendations to correct or ems identified. You have no budget to purchase additional hardware. You need to make recommendations using hardware already available (15 points) includes 400,000 You will be evaluated based on your improvements in a) performance, b) security, c) backup and d) hardware utilization. You...
26. Choose best answer from drop-down menu: 2 points Radium-226 decays by alpha emission. What is its decay product? B) 486 A) 229Fr C) 230Th 2264 D) E) 234Po Choose 27. Choose best answer from drop-down menu: 2 points Which is a balanced nuclear equation representing the beta emission of iodine-131? A) " 131 53 131 541 Xe + OB 131 151 Sb + He 33 B) C) 331 + B 131 Te 52 131 D) 1 13, Te +...
2. Choose best answer from drop-down menu: 2 points If AGº for a reaction is greater than zero, then Pick the choice that BEST fills in the blank. Choose 3. Choose best answer from drop-down menu: 2 points For a given reaction at equilibrium, AH = -19.9 kJ/mol and AS = -55.5 J/K-mol. The reaction will have at a temperature of Choose 4. Choose best answer from drop-down menu Consider a process for which AH = 211 kJ and AS...
19. Choose best answer from drop-down menu: 3 points Calculate Ecell for the reaction 2 given the Ecell of reaction 1, Reaction 1: 2 Cr2+ + Cl2(g) → 2Cr3+ + 2CH Reaction 2: Cr3+ + C + Cr2+ + 1/2 Cl2(g) Ecell = 1.78 V Ecell = ? Choose 20. Choose best answer from drop-down menu: 2 points Consider the following standard reduction potentials in acid solution: E°(V) AP+ + 3e → Als) -1.66 AgBr.) + e + Agos) +...
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