AP Computer Science Principles Flashcards: Binary Search
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
How does the binary search algorithm reduce the search area during its process?
The algorithm starts in the middle and eliminates half of the data set with each iteration.
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How does the binary search algorithm reduce the search area during its process?
The algorithm starts in the middle and eliminates half of the data set with each iteration.
If you need to perform a binary search on an unsorted collection of numbers, what is the necessary first step?
You must first sort the data, because binary search requires the data to be in sorted order to function correctly.
When analyzing a binary search, what key performance metric must you be able to determine?
You must be able to determine the number of iterations required to find a specific value within a data set.
Explain the requirements necessary to complete a binary search.
To complete a binary search, the primary requirement is that the data set must be in sorted order.
What are the two conditions that will cause a binary search to terminate?
A binary search terminates when either the desired value is found or when all elements have been eliminated from the search.
When is binary search a more efficient choice than a sequential/linear search?
Binary search is often more efficient than a sequential/linear search when the data being searched is already sorted.
Binary Search Efficiency
Binary search is an efficient algorithm for sorted data because it repeatedly divides the search interval in half, significantly reducing search time compared to linear methods.
What is the binary search algorithm?
It is an algorithm that starts at the middle of a sorted data set and eliminates half of the data in each step, repeating until a value is found or all elements are eliminated.
What is the single most important requirement for a data set to be searchable using a binary search?
The data must be in sorted order before the binary search algorithm can be applied.
Where in a data set does a binary search begin?
The binary search algorithm starts at the middle element of a sorted data set.