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Write Relational algebra expressions for the given queries.(i) List the employee numbers, employee names and their manager numbers working in several branches who earn more than $ 30000. (ii) List the details of Spares available in several Branches supplied by the vendor Rock-Hard company.
What is link destruction? Link destruction is inverse of link creation. When a link is destroyed makes sure the associated objects accessible by other handles or intentionally
The information in ROM is stored ? Ans. By the manufacturer throughout fabrication of the device.
How many select lines will a 32:1 multiplexer will have ? Ans. 5 select lines will be required for 32 inputs, as 2 5 = 32.
Consider the Hire Assistant problem. We interview n candidates and always hire the best qualified so far. Let n = 5 for our example. Find the probabilities that we hire exactly 1 t
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Define deadlock. A process requests resources; if the resources are not available at that time, the method enters a wait state. Waiting processes might never again change state
A minterm is an AND expression involving all input variables in either inverted or non-inverted form.For one particular row the associated mintermis the only minterm which equals l
Define multi programming? Many operating systems are designed to enable the cpu to process a number of independent programs concurrently. This concept is known as multi progra
A field containing quantity amounts (data type QUAN) must be assigned to a reference table and a reference field. Explain? As a reference table, a system table having all the v
Which is not a layer of IO management module? Ans. MCS that is Management Control System, is not a layer of IO management module.
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