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# What is the disadvantage of linear search?

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## Related Questions

###### Asked in Java Programming, C Programming

### What are advantages and disadvantages of linear search?

The primary advantage of linear search is its simplicity:
conceptually, it's extraordinarily easy to understand, and,
implementation-wise, it's also very straight-forward. From an
operational standpoint, linear search also is very resource
efficient - it does not require copying/partitioning of the array
being search, and thus is memory-efficient. It also operates
equally well on both unsorted and sorted data.
The primary disadvantage of linear search is that it has a very
poor O(n) general efficiency. That is, the performance of the
algorithm scales linearly with the size of the input. For the
general case, linear search thus is considerably slower than many
other search algorithms.
In certain cases where additional information about the current
contents of the list being searched are known, linear search can
perform as good or better than many other types of search. For
instance, if you can assume that the list you have is a FIFO or
LIFO, and you know that the item you are looking for is either
almost always recently added or almost always at the end of the
list, then a tailored linear search can provide very good
performance.

###### Asked in C Programming

### What is the advantage of binary search over linear search?

Binary search is more efficient than linear search because we
perform fewer comparisons on average. With linear search we can
only eliminate one element per comparison each time we fail to find
the value we are looking for, but with binary search we eliminate
half the set with each comparison. For a set of n elements, the
worst case is O(n) comparisons for a linear search and O(log n)
comparisons for a binary search. Although there will be fringe
cases where a linear search is quicker (such as when the set is
particularly small or the values we seek are at or near the
beginning of the sequence), we have to look at the worst case.

###### Asked in Computers, Computer Programming

### What is the Meaning of linear search?

Linear search means searching elements in the order they appear
in the data sequence. Linear search applies to unsorted sequences
and has an average time complexity of O(n) for n elements. When the
elements are in sorted order, we can use binary search instead,
which reduces the average time complexity to O(log n).

###### Asked in Computer Programming

### Why linear search is called sequential search?

A linear search is called a sequential search because a
sequential search takes linear time and therefore has a worst-case
time-complexity of O(n) for a data sequence of n elements. Although
there are more efficient search algorithms than linear search, not
all data containers are ideally suited to them. For example,
although a binary search can be performed in quadratic time (O(log
n)) when the data container is in sorted order, we can only achieve
maximum efficiency when the data container also supports
constant-time random-access. Arrays and vectors do support
constant-time random-access, but if the container is not sorted
then we must resort to the less-efficient linear search. Linked
lists do not support constant-time random-access thus a linear
search would be more efficient even if the list were in sorted
order.

###### Asked in Essays

### Write a short note on linear search?

Linear search, also known as sequential search, is a process
that checks every element in the list sequentially until the
desired element is found. The computational complexity for linear
search is O(n), making it generally much less efficient than
binary search (O(log n)). But when list items can be
arranged in order from greatest to least and the probabilities
appear as geometric distribution (f (x)=(1-p) x-1p, x=1,2),
then linear search can have the potential to be notably faster than
binary search.

###### Asked in Computer Programming, C Programming

### What are the Advantages of binary search on linear search in c?

A binary search runs in O(log n) time, compared to linear
search's O(n) time. What this means is that the more elements are
present in the search array, the faster a binary search will be (on
average) compared to a linear search. As an example, given 100
elements, a binary search will discover the item using no more than
7 iterations, while a linear search will require up to 100
iterations; going to up 1000 elements requires only up to 10
iterations, compared to linear search's 1000 maximum iterations.
The downside to binary search, however, is that it only operates on
a sorted array, which means the data must be pre-sorted using some
means.

###### Asked in C Programming

### What are the advantages of binary search over sequential search?

The advantage of a binary search over a linear search is
astounding for large numbers. For an array of a million elements,
binary search, O(log N), will find the target element with a worst
case of only 20 comparisons. Linear search, O(N), on average will
take 500,000 comparisons to find the element.