Are you interviewing for a tech position? If so, you need to be prepared for some tough questions. Many companies are now using difficult interview questions to weed out candidates. The good news is that if you know how to answer them, you will have a much better chance of getting the job. In this blog post, we will discuss 7 of the toughest tech interview questions and how to answer them according to the experts at Revature.
What is a Hash Table?
A hash table is a data structure that stores key-value pairs. It is used to implement associative arrays or maps. A hash table uses a hash function to compute an index into an array of buckets or slots from which the desired value can be found.
What is a Heap?
A heap is a tree-based data structure that satisfies the heap property: if A is a parent node of B, then the key of node A is ordered with respect to the key of node B with the same ordering applied across the heap. Heaps can be used to implement priority queues, where the key of each node corresponds to its priority.
What is a Binary Tree?
A binary tree is a tree-like data structure where each node has at most two children. The left and right children of a node are often referred to as the left child and right child, respectively. A binary tree is either empty or consists of a root node and two subtrees, each of which is a binary tree.
What is a Linked List?
A linked list is a data structure that consists of a series of nodes. Each node contains two fields: a data field and a reference field. The data field stores the information associated with the node, while the reference field stores the address of the next node in the list.
What is a Stack?
A stack is a data structure that allows you to store and retrieve data in a Last In, First Out (LIFO) manner. A stack is analogous to a physical stack of objects, such as a pile of books. The last book added to the pile is the first book that can be removed.
What is a Queue?
A queue is a data structure that allows you to store and retrieve data in a First In, First Out (FIFO) manner. A queue is analogous to a line of people waiting for something, such as a bus. The first person in line is the first person who will be able to board the bus.
What is an Algorithm?
An algorithm is a set of steps that are followed in order to solve a problem. Algorithms can be designed using pseudocode, which is a high-level, English-like language that is used to describe the steps of an algorithm.
Closing Thoughts on the Toughest Tech Interview Questions
These are just a few of the toughest questions you may be asked in a tech interview. Remember, the key is to not get flustered and to take your time in answering each question. If you do, you will greatly increase your chances of impressing your interviewer and getting the job.