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Q1: Northeastern University CET2200 – Data Structures and Algorithms Homework 4 1. Order the following functions by growth rate N, N1.5, N2, √N, NlogN, 2N. See Answer
Q2:2. An algorithm takes 0.5 ms for input size 100. How long will it take for input size 500 if the running time is the following (assume low order terms are negligible) a. Linear b. O(NlogN) c. QuadraticSee Answer
Q3:This assignment consists to two parts: In the first part you will compile and run the Array class implementation that is posted in the week 5 module. The Array class implements range checking to ensure that subscripts remain within the bounds of the Array. The class allows one array object to be assigned to another with the assignment operator. There is no need to pass the array size separately to functions that receive array parameters. Entire Arrays can be input or output using the stream insertion (>>) and stream extraction (<<) operators. You can compare Arrays with the equality operator (==). It is a powerful Array class. Check the results and post them on Canvas. The second part of the assignment has to do with duplicate elimination in an array of integers. Use a one-dimensional built-in array to solve the following problem. Read in 20 numbers, each of which is between 20 and 100 inclusive. As each number is read, validate it and store it in the array only if it isn’t a duplicate of a number already read. After reading all the values, display only the unique values that the user entered. Provide for the “worst case” in which all 20 numbers are different. Use the smallest array to solve this problem. Post the source files and the result on Canvas. See Answer
Q4:1. Explain the concept of an "atomic transaction."See Answer
Q5:2. Distinguish between reprocessing and rollforward as database recovery techniques.See Answer
Q6:3. Distinguish between statement-level consistency and transaction-level consistency.See Answer
Q7:4. Explain the process of using optimistic locking.See Answer
Q8:5. Explain the meaning of the expression ACID transaction.See Answer
Q9:6. What are the four transaction isolation levels?See Answer
Q10:7. Briefly define the problems that can occur because of concurrent processing that are addressed by resource locking.See Answer
Q11:8. What is deadlock? How can it be avoided? How can it be resolved when it occurs?See Answer
Q12:9. Explain the term cursor. Explain why a transaction may have many cursors. Also, how is it possible that a transaction may have more than one cursor on a given table?See Answer
Q13:10. Explain dynamic cursors. Give an example of their use.See Answer
Q14:Let us create following BST original 50 30 70 20 40 60 80 delete 60 30 70 20 40 80 inorderSee Answer
Q15:What is an Abstract data type? How is it implemented in C++?See Answer
Q16:How does a class accomplish encapsulation, and data hiding?See Answer
Q17:What is a default constructor? What is the advantage of having one?See Answer
Q18:Transform the declaration template<class T, int size = 50> class genClass { T storage[size]; .................. void memberFun() { ............ if (someVar < size) { ...... } ............ } }; which uses an integer variable size as a parameter to template, to a declaration of genClass which does not include size as a parameter to template and yet allows for flexibility of the value of size. Consider a declaration of genClass's constructor. Is there any advantage of one version over another? See Answer
Q19:The STL provides class templates that process lists, stacks, and queues. In a linked list, the order of the elements is determined by the order in which the nodes were created to store the elements. Iterators are used to step through the elements of a container. A vector container stores and manages its objects in a static array. An iterator is generated by member functions of containers. The functions begin, rbegin, rend, etc are members of iterators. The statement vector<int> vec[5] declares a vector of 5 elements. A linked list is a dynamic data structure. Item insertion and deletion from a linked list does not require data movement. The search on a linked list is sequential. See Answer
Q20:Fill in the blanks: A linked list is a list of items called ____ (elements, nodes, items) A _______ linked list can be traversed in either direction (singly-linked list, Circular linked list, doubly-linked list) Item insertion in a vector container is accomplished by using the operations _______ and ______ ( pop_back, insert, push_back) The three main components of STL are ____, _______, and ________. (algorithm, vector, iterator, deque, container) In a doubly linked list, item insertion and deletion requires the adjustment of ________ pointer(s) in a node (zero, pointer, two) See Answer

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