Lecture 5-7

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Suppose we want to arrange the n numbers stored in an array such that all negative values occur before all positive ones. The minimum number of exchanges required in the worst case is:
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n-1
The time complexity of linear search is given by:
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O(n)
a = 0 N=1000 for i in range(0, N,1): for j in range(N, 0,-1): a = a + i + j; print(a) The running time is:
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O(N*N)
The complexity of recursive Fibonacci series is
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O(2ⁿ)
N=5 a = 0 i = N while (i > 0): a = a + i; i = i/2; The running time is:
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O(log N)
Consider the following function: T(n) = n if n ≤ 3 T(n) = T(n-1) + T(n-2) - T(n-3) otherwise The running time is:
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n
The time complexity of an algorithm T(n), where n is the input size, is given by T(n) = T(n - 1) + 1/n if n > 1 The order of this algorithm is
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log n
Which of the following best describes the useful criterion for comparing the efficiency of algorithms?
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Both time and memory
Which of the following is not O(n2)?
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n^3/(sqrt(n))
Suppose T(n) = 2T(n/2) + n, T(0) = T(1) = 1 Which one of the following is false
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\Omega(n^2)
The following statement is valid. log(n!) = \theta (n log n).
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True
To verify whether a function grows faster or slower than the other function, we have some asymptotic or mathematical notations, which is_________.
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Big Omega Ω (f), Big Oh O (f), Big Theta θ (f)
An algorithm performs lesser number of operations when the size of input is small, but performs more operations when the size of input gets larger. State if the statement is True or False or Maybe.
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true
An algorithm that requires ........ operations to complete its task on n data elements is said to have a linear runtime.
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2n+1
The complexity of adding two matrices of order m*n is
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mn
The order of an algorithm that finds whether a given Boolean function of 'n' variables, produces a 1 is
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constant
The concept of order (Big O) is important because
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(c) a and b
When we say an olgorithm has a time complexity of O(n), what does it mean?
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The computation time taken by the algorithm is proportional to n
What is recurrence for worst case of QuickSort and what is the time complexity in Worst case?
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Recurrence is T(n) = T(n-1) + O(n) and time complexity is O(n^2)
Suppose we are sorting an array of eight integers using quicksort, and we have just finished the first partitioning with the array looking like this: 2 5 1 7 9 12 11 10 Which statement is correct?
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The pivot could be either the 7 or the 9.
Which of the following is not an in-place sorting algorithm?
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Merge sort
Running merge sort on an array of size n which is already sorted is
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O(nlogn)
Merge sort uses
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Divide-and-conquer
Which of the following algorithm design technique is used in the quick sort algorithm?
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Divide-and-conquer

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