RECENT INTERVIEW QUESTIONS

Implementing Genric queue data structure in Java

Given the linked list implementation of a generic queue in Java.

Posted in: Algorithms,
Search in a sorted multi-level linked list

Given a multi-level linked list as shown in this post. Write code to search in such a list.

Posted in: Algorithms,
Printed a sorted multi-level linked list

Given a linked list, where each node has a pointer to the head of its child list (in addition to the next pointer). The child list is a normal linked list with each node having one data and one pointer to the next node in the child list. Let the lists be arranged (as above) […]

Posted in: Algorithms,
Traverse and print a linked list in forward and backward order

Given a linked list, write code to print the list in forward and backward order. Solution: This problem is discussed as an example in this post. A linked list is a data structure where address of next node is stored inside each node. Structure of Node Structure of Node of a list is as given […]

Posted in: Algorithms,
Find numbers with more than k-bits in their binary representations

Given an array of unsigned integers, print all the numbers that have more than k bits set in their binary representation. For example, if k = 2, and input array is: int arr[] = {2, 1, 15, 9, 7, 14, 32, 127}; Then the output should be: 15 7 14 127 Because all of these […]

Posted in: Algorithms,
Remove all white spaces from a string

Given a string that may have white spaces, write code to remove all white spaces from than string. For example: Input String: “IT IS HOT OUTSIDE” Output String: “ITISHOTOUTSIDE” Input String: ” I T I S HOT ” Output String: “ITISHOT”

Posted in: Algorithms,
Difference between nodes of alternate vertical levels in a tree

The question below is given in the format in which questions are asked on coding interview Platforms like HackerRank, CodeChef, CodeJam, etc. PROBLEM STATEMENT Vertical level of a node is the vertical distance of that node from the root. Vertical level of the root node is 0. If a node is at vertical level k, […]

Posted in: Algorithms,
Rearrange the nodes of a linked list

Given a linked list, rearrange the node of the list as shown below: INPUT LIST: 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7 -> 8 OUTPUT: 1 -> 8 -> 2 -> 7 -> 3 -> 6 -> 4 -> 5 INPUT LIST: 1 -> 2 -> 3 -> 4 […]

Posted in: Algorithms,
Merge alternate nodes of the two lists

We have already seen the code to merge two sorted linked list, such that the final list is also sorted. The logic and code can be found in this post. In this post, we want to merge the two lists in a way that in the final list, element comes from the two lists alternately […]

Posted in: Algorithms,
Water overflowing from glass arranged in form of triangle

Glasses are arranged in the form of triangle (on top of each other) as shown below: 1 2 3 4 5 6 7 8 9 10 ……………….. …………………. Liquid is poured into 1st glass (Glass no. 1). When it is full, then extra liquid will flow into the glasses 2 and 3 in equal quantities. […]

Posted in: Algorithms,

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