Data Structure and Algorithms [CO2003] Chapter 2
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Questions and Answers

What is the main purpose of measuring computational complexity?

  • To compare the time and/or space required by different algorithms (correct)
  • To analyze the complexity of individual control structures
  • To determine the best algorithm for a problem
  • To design strategies for problem solving
  • What is the term for the measure of the difficulty degree of an algorithm?

  • Computational complexity (correct)
  • Big-O notation
  • Algorithm efficiency
  • Trade-off
  • What is the focus of Learning Outcome L.O.1.2?

  • Characterizing computational complexity using Big-O notation (correct)
  • Describing strategies in algorithm design
  • Analyzing algorithms using recursion
  • Comparing complexity classes
  • What is the trade-off involved in algorithm design?

    <p>Between time and space complexity</p> Signup and view all the answers

    What is the main focus of algorithm design?

    <p>To find a balance between time and space complexity</p> Signup and view all the answers

    What is the purpose of Big-O notation?

    <p>To characterize the computational complexity of algorithms</p> Signup and view all the answers

    What is the general format of algorithm efficiency?

    <p>efficiency = f(n)</p> Signup and view all the answers

    What is the value of f(n) in the linear loop for(i = 0; i < 1000; i++)?

    <p>f(n) = n</p> Signup and view all the answers

    What is the value of f(n) in the logarithmic loop while(i = 1)?

    <p>f(n) = log2 n</p> Signup and view all the answers

    What is the formula to calculate the iterations in nested loops?

    <p>Iterations = Outer loop iterations × Inner loop iterations</p> Signup and view all the answers

    What is the purpose of the variable 'n' in the algorithm efficiency?

    <p>It represents the size of the problem</p> Signup and view all the answers

    What is the difference between the linear loops for(i = 0; i < 1000; i++) and for(i = 0; i < 1000; i += 2)?

    <p>The number of iterations is different, and the efficiency is f(n) and f(n/2) respectively</p> Signup and view all the answers

    Study Notes

    Algorithm Complexity

    • Computational complexity is a measure of an algorithm's difficulty degree in terms of time and/or space.

    Algorithm Efficiency

    • An algorithm's efficiency is measured by its computational complexity, considering the time and space required to solve a problem.
    • The general format for expressing an algorithm's efficiency is f(n), where n is the size of the problem.
    • The focus is on the key number that determines the size of the input data.

    Linear Loops

    • A linear loop's time complexity is directly proportional to the size of the input data (n).
    • The number of times the body of the loop is replicated determines the time complexity.
    • Examples: f(n) = n, f(n) = n/2.

    Logarithmic Loops

    • A logarithmic loop's time complexity is proportional to the logarithm of the size of the input data (log2 n).
    • Multiply loops with divisions by 2 result in logarithmic time complexity.
    • Examples: f(n) = log2 n.

    Big-O Notation

    • Not mentioned explicitly in this chapter, but it's a notation used to characterize the computational complexity of algorithms.

    P and NP Problems

    • Not mentioned explicitly in this chapter, but it's a concept related to computational complexity.

    Learning Outcomes

    • Define the concept of computational complexity and its special cases (best, average, and worst).
    • Analyze algorithms using Big-O notation to characterize their computational complexity.
    • List and compare complexity classes (e.g., constant, linear, etc.).
    • Understand the trade-off between space and time in solutions.
    • Describe strategies in algorithm design and problem solving.

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    Description

    This quiz covers Algorithm Complexity, including Big-O notation, problems and common complexities, and P and NP problems.

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