7136252
Description
Quiz by Mena Sargios, updated more than 1 year ago
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Created by Mena Sargios
almost 8 years ago
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Question 1
Question
What symbol is used to represent Load Factor and give the equation for determining Load Factor?
Answer
-
Alpha, (current number of hash items) / (table size)
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none of the above
Question 2
Question
What is the hash function's (h(x)) functionality?
Answer
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Maps the search key of an item to a location
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none of the above
Question 3
Question
A good hash function places items ____ throughout the
the hash table.
Answer
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A) every other level
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B) at every odd position
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C) evenly
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D) The hash function does not place items on the table.
Question 4
Question
What is hashing?
Answer
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The use of a hash table to determine whether variables have been stored/accesed and allows for quicker searching.
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none of the above
Question 5
Question
what is not good thing for hash function to have?
Answer
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A.places items evenly throughtout the hash table
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B.use a prime base
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C,has no search key
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D.none of the above
Question 6
Question
a Hash table is an array that contains items, assigned by a hash function
Answer
- True
- False
Question 7
Question
what is Hash table?
Answer
-
An array that contains items, assigned by a hash function.
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none of the above
Question 8
Question
How do you determine the load factor of a hash table?
Answer
-
(current number of hash items)/(table size)
-
none of the above
Question 9
Question
Which of the following is not a requirement for a good hash function?
Answer
-
A) Fast (and easy) to compute
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B) Places items evenly throughout the hash table
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C) Involves the entire search key
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D) Uses a non-prime base, if it uses modulo arithmetic
Question 10
Question
Which one is NOT a requirement for a good has function?
Answer
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a. Fast and easy to compute
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b. Involves entire search key
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c. Use a prime base if it uses any arithmetic
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d. Items placed evenly throughout the hash table
Question 11
Question
An array that contains items, assinged by a hash function is called
Answer
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A. Hash function
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B. Hash table
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C. Hash Brown
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D. None of the above
Question 12
Question
What is a hash table?
Answer
-
A) An array that contains items, assigned by a hash function.
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B) A perfectly cooked pile of potatoes
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C) A table of hash signs (#)
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D) None of the above.
Question 13
Question
Which of the following is NOT a good requirement for a hash function?
Answer
-
A. Fast and easy to compute
-
B. O(nlogn) lookup time
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C. places items evenly
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D. involves the entire search key
Question 14
Question
What are the requirements for a good hash function?
Answer
-
A. fast and easy to compute
-
B. places items evenly throughout the hash table
-
C. involves the entire search key and uses a prime base, if it uses modular arithmetic
-
D. All of the above
Question 15
Question
Which of the following is a requirement for a good hash function?
Answer
-
A.Fast to compute
-
B.Places items randomly throughout the hash table
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C.Involves parts of the search key
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D.All of the above
Question 16
Question
Which statement is NOT true?
Answer
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a. hash table : an array that contains items, assigned by a hash function
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b. perfect hash function : maps each search key to a unique location
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c. collision : occurs when the hash function maps 2+ items to the same location
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d. collision : occurs when the hash function maps not 2+ items to the same location
Question 17
Question
What is the difference between a Perfect hash function and a Unifrom hash function?
Answer
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A Perfect hash function maps each key to a unique location. While a Uniform hash function is equally likely to map a key to any index in the table.
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none of the above
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