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Let total amount of work be 60 units (LCM of 15 and 20). Efficiency of ‘A’ = 60/15 = 4 units/day Efficiency of ‘B’ = 60/20 = 3 units/day Amount of work done by ‘A’ and ‘B’ together in 3 days = (4 + 3) × 3 = 21 units Time taken by B to complete remaining work = {(60 – 21)/3} = 13 days
What is a table joined with itself called?
What does the ‘
During transaction before commit which of the following statements is done automatically in case of shutdown?
Which stage involves evaluating the project's practicality, cost, and resources before proceeding further?
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Which of the following commands are used to put a restriction on the number of rows returned from a query?
A system is in a safe state when:
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If every non-key attribute is functionally dependent on the primary key, the relation will be in