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- The hash code for Strings can be calculated once, at the time the String is created, which could potentially reduce its complexity.The precomputed value would be returned by subsequent calls to hashCode. This has the potential to be promising because a String's value never changes. How would you rate the effectiveness of such a procedure?Hashing is a technique that is used to uniquely identify a specific object from a group of similar objects. Can you use one or two real-world example(s) to explain what a "hash" really is? How can a programmer implement it? Pls, give a thorough ans.A hash code is generated by the Java hash function for Strings based on a string's highest allowed character count. Explain how a powerful, constant-time hashing algorithm can be created given that Strings have no useful maximum length. Which eight characters, say, would you select to represent a string of length l if you had to?
- you're storing information about the users of a web-based application, which is to say that each user has a username that is a string of uppercase letters, lowercase letters, and digits. let's imagine that the most common operations are to add a new user to the application and to check whether a user already exists (given a username). A hash table would be an appropriate way to solve this problem because you know that a well-chosen hash function can lead to something akin to Θ(1) lookups and amortized Θ(1) insertions - suppose that you've chosen a hash function that sums the character codes associated with the characters in the username. Is the chosen hash function a good hash function?There is a hash table of size, m = 10,000. Use the classic Mid Square Method to findout the index of the hash table where the information for key k = 9452 will be storedWhich of these is NOT a characteristic of a secure hash algorithm? a. Collisions should be rare. b. A message cannot be produced from a predefined hash. c. The results of a hash function should not be reversed. d. The hash should always be the same fixed size.
- Suppose you are told to implement a open hash table that has at most 12,000 buckets and you expect to use up at most a half of that. What is the average number of attempts you expect to experience for any particular query? Round to the nearest 2 decimal places if necessary.The Java hash function for Strings generates a hash code based on the string's maximum length. Given that Strings have no meaningful length limit, describe how an effective, constant-time hashing method can be built. (Hint: Which of the following eight characters would you use to represent a string of length l?)Draw a hash table given these numbers and hashing function, build each of the hashing options, and decide if it is efficient, and what function or size might be a better match. Explain why it is efficient or what changes you would make for it to be efficient. a. Scenario 1 a. Hashing function: k mod 4 b. Linear Probing c. Array from 0 to 3 d. Values: 19, 7, 12, 11 b. Scenario 2 a. Hashing function: k mod 10 b. Quadratic Probing c. Array from 0 to 9 d. Values: 20 39 23 56 34 29 55 13 c. Scenario 3 a. Hashing function: first three digits of a phone number b. Overflow chaining c. File with base address of 0 and ends at 999 d. Values: 3135552314, 7343455523, 3134445555, 3134441234, 7342346555, e. 5555342232, 4072984555, 2692185552 d. Scenario 4 a. Hashing function: k mod 100 b. Internal Chaining c. Array 0 to 99 d. Values: 314 325 623 2234 425 1234 2132 2361 1245 123 436 742
- Suppose you have a hash table of size N = 64, and you are using quadratic probing with c1 = 1 and c2 = 1. The keys in your hash are 4-digit integers (0000 through 9999) and your hash function is h(k) = (the sum of the digits in k). What are the first 4 values in the search sequence (starting with the home position) for a record with key k=1948? Blank # 1 Blank # 2 Blank # 3 Blank # 4Correct answer will be upvoted else Multiple Downvoted. Don't submit random answer. Computer science. You found a new line of work as an advertiser in a pet shop, and your present errand is to support deals of feline food. One of the methodologies is to sell jars of food in loads with limits. Assume you chose to sell loads with a jars in a load with a rebate and some client needs to purchase x jars of feline food. Then, at that point, he follows a covetous methodology: he purchases ⌊xa⌋ loads with a markdown; then, at that point, he needs to purchase the leftover (xmoda) jars individually. ⌊xa⌋ is x separated by an adjusted down, xmoda is the remainer of x isolated by a. However, clients are insatiable as a rule, so assuming the client needs to purchase (xmoda) jars individually and it happens that (xmoda)≥a2 he chooses to purchase the entire bunch of a jars (rather than purchasing (xmoda) jars). It makes you, as an advertiser, cheerful since the client purchased more…I need help with this question, please. Parts A and B A.) Add the following numbers to an 11-entry hash table using linear probing to resolve collisions. Stop before adding an item that would result in α > 0.75. This means you might not use all the numbers. (Spoiler alert: you won't use them all.) 39 68 60 71 83 52 99 55 49 77 58 26 76 66 37 28 For the hash function, simply take the number mod the table size. In 11 blanks, write the number that would end up at that entry in the table. If there is no number at that location, write empty. B.) Add the following numbers to a 23-entry hash table using linear probing to resolve collisions. Stop before adding an item that would result in α > 0.75. This means you may not use all the numbers. 39 68 60 71 83 52 99 55 49 77 58 26 76 66 37 28 For the hash function, simply take the number mod the table size. In 23 blanks, write the number that would end up at that entry in the table. If there is no number at that location, write…