Which statement is not true about the sequential search algorithm? a. An unorder

Question

Which statement is not true about the sequential search algorithm? a. An unordered array must use sequential search. b. The algorithm returns the index of the target if it is found. c. The sequential search algorithm is faster than binary search. d. The sequential search algorithm ends when either it finds the target or runs off the end of the Which statement is not true about the binary search algorithm? a. It begins its search for the target in the middle of the array. b. The algorithm returns the index of the target if it is found. c. The algorithm can only be applied when the target is found in the array. d. It reduces the amount of array to be examined by approximately half on each pass. Use the following array for the next three questions: Which element of the array will first be compared to target 25 using the binary search a. 10 b. 30 c. 40 d. 70 When searching for target 25 using the binary search algorithm, what are the values of array first at the start of the second pass? a. 0 b. 2 c. 3 d. 4 e. 6 When searching for target 25 using the binary search algorithm, what are the values of array last at the start of the second pass? a. 0 b. 2 c. 3 d. 4 e. 6

Explanation / Answer

1)Ans: c

Explanation : This statement is not true always because if the searching element is at the end of the array then it takes lot of time to find it. If the element is at the starting of array then you can find it easily. But the binary search is fast than seqential search algorithm.

2)Ans: c

Explanation :This statement is not true because it is saying that you can apply binay search algorithm to the array only when element is found. But Binary search algorithm is used to find the element is there o r not in the array.But this statement saying that if the element is there then only you can apply but it is wrong.To find the element in the sorted array we are using binary serach algorithm.

3) Ans :c

Explanation : binary search algorithm firstly compares the searching element with the middle (( first element index +last element index)/2 ) element of the array. So 40 firstly compared with 25.

4)Ans : c

Explanation : There are 3 elements (10,20,30) in the second pass to compare with the target 25.

5) Ans : a

Explanation : Binary search algorithm compare with the no element in the second pass last.

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