Provide an example to illustrate each of the following: Keys of Nature Primary Keys That Combine uses surrogate primary keys in place of the actual primary keys found in nature.
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- What is Reentrancy?Create an exercise driver programme that employs techniques from our ordered symbol-table API on challenging or pathological instances that may arise in actual applications. Simple examples include keys that are already in order, keys that are in reverse order, keys that are all the same, and keys with just two unique values.Create an exercise driver programme that employs our ordered symbol-table API's methods on challenging or pathological situations that might occur in real-world applications. Examples of straightforward key sequences include those that are already in order, those that are reversed, those where all of the keys are the same, and keys that only have two different values.
- PLEASE DRAW NEATLY! Dusty Dude Ranch has decided to store information about the cowboys who work for the ranch in a database. Each Cowboy has unique cowboy ID, a full name, age, an address, an email, a nickname, horse or horses, and a set of Skills. Each Skill has a unique skill ID, name, description, and risk level. Each Horse has a unique horse ID, name, color, height and cost. Each cowboy may have one or more Skills, and a given Skill may be done by several cowboys. Each cowboy may have one or more Horses, but no Horse can owned by more than one cowboy. Do not forget about data retention. Draw ERD for Dusty Dude Ranch’s Include all correct attributes in the ERD. You can neatly hand draw the ERD and upload a picture of it, if need be. Show the relational schema that corresponds to the ERD you designed in the previous question. MAKE SURE TO SHOW PRIMARY KEYS AND FOREIGN KEYS!!DISCUSS THE TYPES OF PRIMITIVES AND ATTRIBUTES.PLEASE DRAW NEATLY! Dusty Dude Ranch has decided to store information about the cowboys who work for the ranch in a database. Each Cowboy has unique cowboy ID, a full name, age, an address, an email, a nickname, horse or horses, and a set of Skills. Each Skill has a unique skill ID, name, description, and risk level. Each Horse has a unique horse ID, name, color, height and cost. Each cowboy may have one or more Skills, and a given Skill may be done by several cowboys. Each cowboy may have one or more Horses, but no Horse can owned by more than one cowboy. Do not forget about data retention. Draw ERD for Dusty Dude Ranch’s Include all correct attributes in the ERD. You can neatly hand draw the ERD and upload a picture of it, if need be. Show the relational schema that corresponds to the ERD you designed in the previous question
- Make a distinction between structure and class. What is the advantage of class over structure? Give a good example to back up your response.In the context of data binding, what is meant by "observable objects" and why are they important? Give an example of their usage.Fill in the reasons in the following proof sequence. Make sure you indicate which step(s) each derivation rule refers to. Proof Sequence 12345 (p^q)-r (p/q)Vr (pV-a)Vr pV(-qVr) p(-qVr) Statements given Reasons