Amazon is the world’s largest e-commerce company that hires employees from all over the world. Amazon works with some of the most talented people and believes in hiring
worthy candidates. The underlying motive of Amazon has always been to broaden the spectrum of the company by engaging people from different ethnicities and backgrounds. This mantra is the reason for the success of the biggest e-commerce company.
The interview process for a company as renowned as Amazon is bound to seem daunting for aspirants. This nervousness for the Amazon interview experience is somewhat justified, but if you have precedent knowledge about what is coming, you’re already good to go. This article will look at the top Amazon Interview questions and answers in 2022 that can help you with your preparation process.
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Amazon Interview Process
To begin with, the Amazon interview process is divided into the following steps:-
- The first step is to resume screening of a candidate. Candidates can apply for their desired position over LinkedIn or the company’s main website.
- Once they go through your application carefully, they immediately contact you if you possess the required skill set.
- After resume screening, you’re put to the coding test. The recruiters want to see your technical abilities, which should be handy while applying for Amazon’s job. You’ll be given a set of coding questions and a limited duration to complete.
- If you’ve cracked the previous two rounds, you’ll be asked to appear for two interviews.
Most of the questions in Amazon are relevant to the position applied and technical skills. Therefore, candidates must have their fair share of fundamental and advanced understanding of the subject. Let’s delve into the top interview questions asked by Amazon.
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Top Amazon Interview Questions & Answers
Q.1 What is the function of the DBMS?
Ans. DBMS, or Database Management System, is an interface between an end-user and a database that allows access to store, create, retrieve, and update data in the database. It protects the information from System crashes or data theft. It also can differentiate between different users.
Q.2 What is BFS?
Ans. Breadth-first research is an algorithm that transverses the graph from the root node and then explores all the neighbouring nodes. After that, it goes further to explore the other unexplored nodes. It is used for searching tree data for a node that satisfies the given property. There has to be a queue called the extra memory that keeps track of all the child nodes encountered but not explored. There are numerous ways to transverse the graph, but BFS is one of the most common approaches.
Q.3 What is data structure?
Ans. A data structure is a storage that stores and organises all the data. It is an approach of arranging data into computers so anyone can easily access and update it smoothly and efficiently. It stores the information sequentially, where each element is related to its previous one. Depending on the project, you can choose your system’s most appropriate data structure. For instance, you can opt for an Array data structure to arrange the data sequentially. Some other examples are– List, Queue, Stack, etc.
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Q.4 What is a search operation?
Ans. Search operation refers to an element which is to be searched. It starts by searching from the root node, where the data is less than the key value. From there, you can search for the elements in the left subtree. A search operator is used in search engine queries to attenuate the focus of the search.
Q.5 What is hashing?
Ans. Hashing is a process of converting a key to a different value. A hash function uses a mathematical algorithm to generate a new value, creating a hash value or a hash. For example, you can generate an associative data storage where the data index is found by providing its key values using the hash tables. A good hash cannot be converted back to the original key, also known as a one-way hashing algorithm.
Q.6 What is collections API?
Ans. A collection API is a unified framework that represents and manipulates collections of objects, which can be manipulated independently of the details of their representation. The advantages of collections API are-
- It provides interoperability between unrelated data
- It reduces the effort required to learn, design, and implement APIs
- It facilitates software reuse
Q.7 List a few advantages of packages in Java.
Ans. Some advantages of packages in Java are-
- Packages avoid name clashes
- Classes can only have fields visible to packages, even if they are visible outside their package.
- It provides easier access control.
- We can also have hidden classes used by the packages but not visible outside the packages.
Q.8 How does the Kruskal algorithm work?
Ans. Kruskal’s algorithm determines the minimum spanning tree for a connected weighted graph. It treats the graph as a forest, with each node with an individual tree. The main aim of the Kruskal algorithm is to find the subside of edges.
Q.9 What are the differences between a graph and a tree?
Ans. A tree is a non-linear data structure consisting of nodes and edges. A tree also has a unique node which is called a root. A tree can have several child nodes; in binary nodes, each node consists of two child nodes. Trees cannot form a cycle.
A graph is also non-linear data, a set of vertices/ nodes and edges. Unlike a tree, a graph has no unique node or root. Each node has several edges, and graphs can also form cycles.
Q.10 State at least four kinds of indexing.
Ans. Different types of indexes can be created for various purposes. These are:-
- Unique indexes: It enforces uniqueness in your index keys
- Bidirectional indexes: It allows for scans in forward and reverse directions
- Clustered indexes: This index helps improve the performance of the queries that transverse the table in key order
- Expression-based indexes: It effectively evaluates the queries with the indexed expressions
Q.11 Which is more important: money or work?
Ans. Some personality questions, also called Amazon interview behavioural questions, can also be asked by an interviewer apart from technical questions. Here you have to present your views while being completely logical. For instance, you can say that work is more important than money because it improves your personality and productivity and makes you more impactful. With work, you can continuously improvise, grow, and value the journey that ultimately provides you satisfaction.
Q.12 Has there been a time when you left a project incomplete? How did you handle it?
Ans. Think about when you started working on a project left incomplete for some reason. It can be from your previous university or your personal life instance. For example, you can mention a project you started in your previous company and almost completed. But technical issues or changes in deliverables from the client lead to incompletion. Then mention how you cope with the situation by extending the deadline, increasing the workforce, collaborating with other departments, or any other reason which aptly highlights you are responsible and accountable towards your work.
Q.13 Write a code to find a factorial.
Ans. Factorial program using a loop
#include<stdio.h>
int main()
{
int i,fact=1,number;
printf(“Enter a number: “);
scanf(“%d”,&number);
for(i=1;i<=number;i++){
fact=fact*i;
}
printf(“Factorial of %d is: %d”,number,fact);
return 0;
}
Q.14 What are classes and objects in C++?
Ans. A class is a user-friendly data type that holds its data member and functions. It can then be accessed and used by creating an instance of that class.
An object is the instance of a class. It is created by using a new keyword. The class members are copied into the object when it is generated.
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Conclusion
Being a leading e-commerce company, Amazon has strict parameters to assess its candidates. Still, the right preparation and skill set can ensure you find a place within the organization. This article highlights the top interview questions most likely to be asked by Amazon. We hope these questions offer you an in-depth insight into what to expect and what you must incorporate in your Amazon interview.
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