Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transcribed Image Text:In java there must be at least two calls to the function with different arguments and
the output must clearly show the task being performed.
1. Develop a function that accepts an array and returns true if the array contains any
duplicate values or false if none of the values are repeated.
2. Develop a function that returns true if the elements are in decreasing order and
false otherwise.
3. A "peak" is a value in an array that is preceded and followed by a strictly lower
value. For example, in the array {2, 12, 9, 8, 5, 7, 3, 9} the values 12 and 7 are peaks.
Develop a function that returns the number of peaks in an array of integers. Note that
the first element does not have a preceding element and the last element is not
followed by anything, so neither the first nor last elements can be peaks.
4. Develop a function that finds the starting index of the longest subsequence of
values that is strictly increasing. For example, given the array {12, 3, 7, 5, 9, 8, 1, 4, 6},
the function would return 6, since the subsequence {1, 4, 6} is the longest that is
strictly increasing.
5. Develop a function that takes a string and a single character, then returns a list of
the indexes in the string where the character occurs. For example, given the string
"bookkeeper" and 'e', the function would return (5, 6, 8} since 'e' occurs at those
positions. Return an empty list if the character does not appear in the string even
once.
6. Develop a function that takes two lists of integers and returns a list containing any
value that appears in both parameter lists.
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