readers and writers problem

1 Answers   Cognizant,

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Write a program that takes a 3 digit number n and finds out whether the number 2^n + 1 is prime, or if it is not prime find out its factors.

3 Answers   TCS, Vimukti Technologies, Wipro,

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i don't know about working of nested for loop can any one help me

0 Answers  

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A research student is given a singly-linked list. Each node of the list has a color, which is either “Black” or “White”. He must find if there are more black nodes than white nodes, or vice versa. His advisor gives him 5,000Rs to buy a computer to do the work. He goes to the computer store and finds a slightly defective computer which costs a mere 3,000Rs. This computer has the small problem of not being able to do arithmetic. This means that he cannot use a counter to count the nodes in the list to determine the majority color. The computer is otherwise fully functional. He has the evil idea that he could buy the defective computer and somehow use it to do his work, so that he can use the rest of the money on enjoyment. Show how he can accomplish this amazing task. Write code for an algorithm called ‘findMajorityColor’ which takes a singly-linked list, L, with n nodes and returns the majority color among nodes of L. This algorithm should have the same asymptotic running time as counting the nodes (O(n)). Note: No arithmetic is allowed.

2 Answers  

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Write a program that print in screen a tree with its height taken from user by entering number of 4 digits and find the odd numbers then calculate the sum of odd numbers so he get the height of tree?

0 Answers  

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Question 1: Implement a base class Appointment and derived classes Onetime, Daily, Weekly, and Monthly. An appointment has a description (for example, “see the dentist”) and a date and time. Write a virtual function occurs_on(int year, int month, int day) that checks whether the appointment occurs on that date. For example, for a monthly appointment, you must check whether the day of the month matches. Then fill a vector of Appointment* with a mixture of appointments. Have the user enter a date and print out all appointments that happen on that date. *This Should Be Done IN C++

0 Answers  

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Min-Max Write an algorithm that finds both the smallest and largest numbers in a list of n numbers and calculate its complexity T(n).

1 Answers   Infosys, Qatar University,

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Teta-Omeg-Big-Oh Show that f(n) = n2 + 3n3 is ;(n3).

0 Answers   Qatar University,

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PROBLEM #8 The cashier at the counter of a Super Store, Mr. Khazaanchi has the following bundles of rupee cash notes with him: Rs. 1, 2, 5, 10, 50, 100, 500, 1000 A customer comes at his counter with various items that he has shopped. Mr. Khazaanchi totals the item prices and tells the customer his total amount payable. The customer gives Mr. Khazanchi some amount of cash. Find the total number of rupee notes of each denomination (i.e. 1, 2, 5, 10, 50, 100, 500, 1000) Mr. Khazaanchi will have to give to the withdrawer ensuring that the total number of rupee notes are minimum.

1 Answers   AR, ARJ,

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Definition of priority queue was given. We have to implement the priority queue using array of pointers with the priorities given in the range 1..n. The array could be accessed using the variable top. The list corresponding to the array elements contains the items having the priority as the array index. Adding an item would require changing the value of top if it has higher priority than top. Extracting an item would require deleting the first element from the corresponding queue. The following class was given: class PriorityQueue { int *Data[100]; int top; public: void put(int item, int priority); // inserts the item with the given priority. int get(int priority); // extract the element with the given priority. int count(); // returns the total elements in the priority queue. int isEmpty(); // check whether the priority queue is empty or not. }; We had to implement all these class functions.

0 Answers   Nagarro, Wollega University,

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write a program in c++ to scramble a bmp image file using a scramble key 0x7c and an XOR logic. print out the original image, the scrambled image and the program. Note: the first 24bytes of a bmp file contain the header information of the file.

1 Answers  

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Coin Problem You are given 9 gold coins that look identical. One is counterfeit and weighs a bit greater than the others, but the difference is very small that only a balance scale can tell it from the real one. You have a balance scale that costs 25 USD per weighing. Give an algorithm that finds the counterfeit coin with as little weighting as possible. Of primary importance is that your algorithm is correct; of secondary importance is that your algorithm truly uses the minimum number of weightings possible. HINT: THE BEST ALGORITHM USES ONLY 2 WEIGHINGS!!!

1 Answers   Motorola, Qatar University,

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