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Linear Search Algorithm

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Questions and Answers

Which of the following best describes linear search?

A searching algorithm that starts from the middle of a list and eliminates half of the remaining elements at each step.

A searching algorithm that uses a binary tree to divide the list into smaller sublists.

A searching algorithm that sorts the list before searching for the desired element.

A searching algorithm that checks every element of a list until the desired element is found. (correct)

What is the time complexity of linear search?

O(n^2)

O(n) (correct)

O(1)

O(log n)

What is the space complexity of linear search?

O(log n)

O(1) (correct)

O(n^2)

O(n)

In which programming languages are examples of linear search provided in the text?

Python, Java, and C/C++ Signup and view all the answers

What is returned by the linearSearch function in Python if the element is not found in the array?

-1 Signup and view all the answers

What is the value of 'x' in the Python example code provided in the text?

1 Signup and view all the answers

What is the value of 'n' in the Python example code provided in the text?

5 Signup and view all the answers

What is the output of the Python example code provided in the text if the element is found in the array?

Element found at index: 1 Signup and view all the answers

Study Notes

Linear Search

Linear search is a method for finding an element in a list by iterating through the list one element at a time.

Time Complexity

The time complexity of linear search is O(n), where n is the size of the list.

Space Complexity

The space complexity of linear search is O(1), as it only requires a single additional memory space to hold the index of the element being searched.

Programming Languages

Examples of linear search are provided in Python.

Python Implementation

The linearSearch function in Python returns -1 if the element is not found in the array.
The value of 'x' in the Python example code is the element being searched for.
The value of 'n' in the Python example code is the size of the array.
If the element is found in the array, the output of the Python example code is the index of the element in the array.

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Description

Test your knowledge on linear search with this quiz! Learn how this sequential searching algorithm works and improve your understanding of its implementation.