Amazon Interview Questions

Manish E. - "Clarifying questions: US-based? And All year including holidays? First, what is the goal? Grow user base of Prime? Add revenue? I'd imagine it's to grow Prime base, as it's sticky and I imagine the Lifetime Value is higher as people will shop more if they have Prime. Then, I would look at the users. What are they trying to do? They're purchasing gifts, and looking to gift wrap. Take a look at the number of gift purchases total with gift receipt and no gift wrap. Call this X. Break thi"See full answer

Dinar M. - "Even more faster and vectorized version, using np.linalg.norm - to avoid loop and np.argpartition to select lowest k. We dont need to sort whole array - we need to be sure that first k elements are lower than the rest. import numpy as np def knn(Xtrain, ytrain, X_new, k): distances = np.linalg.norm(Xtrain - Xnew, axis=1) k_indices = np.argpartition(distances, k)[:k] # O(N) selection instead of O(N log N) sort return int(np.sum(ytrain[kindices]) > k / 2.0) `"See full answer

Santhosh K. - "As an engineering manager, motivation is key to the success of the team. Here are some ways to motivate the team: Set clear goals: Clearly defined goals help team members understand what they're working towards and give them a sense of purpose. Offer growth opportunities: Providing opportunities for professional development and advancement can increase motivation and job satisfaction. Provide recognition and rewards: Recognising and rewarding team members for their hard work and achieve"See full answer

Ben G. - "Achieving your metric of success (Daily Active Users, Engagement etc.) Improving user sentiment in their experience of using the product Attention given to accessibility, visual design and content hierarchy The product design aligns with goals and branding of company Product clearly communicates value to our users and helps them achieve their goals"See full answer

Teddy Y. - "class Node: def init(self, value): self.value = value self.children = [] def inorder_traversal(root): if not root: return [] result = [] n = len(root.children) for i in range(n): result.extend(inorder_traversal(root.children[i])) if i == n // 2: result.append(root.value) if n == 0: result.append(root.value) return result Example usage: root = Node(1) child1 = Node(2) chil"See full answer

Manish G. - "When the COVID influx started to flow through hospitals, there were a lot of questions and no time to find solutions. So we set up a command center to manage the flow of issues, triaged them appropriately, and mobilized teams to find quick resolutions. We had to escalate quickly and effectively to find quick resolutions. The team had to rotate the leadership of the command center to avoid burnout due to working round the clock and in unconventional ways to manage the workload. For example, we ha"See full answer

Sridhar R. - "Arrays.sort(inputarray) sliding window with a size of 2. Check for the sum in the sliding window. subtract the start when window moves"See full answer

onering2ruleall - "My leadership style is flexible and adaptive, it varies depending on the team members and the needs of the company. My leadership goal is to empower the team and inspire and grow leaders. In order to achieve that, I combine transformational, democratic and coaching leadership styles. Usually when we are facing a new type of challenge, or at the early stage of a project, I like to adapt the transformational leadership which allows me to listen to all the suggestions from the team members and sta"See full answer

Judy W. - "Situation: COVID has impacted everyone's lives, especially small businesses. Earlier this year, during the second lockdown in Malaysia, it was estimated that 50%-70% of small businesses have closed. It got me thinking, beyond the existing training programmes, what can my company do to support small businesses? Task: So, I took the initiative to gather our Comms and Government Affairs team, to work together and explore how we can: 1) meaningfully demonstrate our company's commitment in"See full answer

Erjan G. - "1) select avg(session) from table where session> 180 2) select round(sessiontime/300)*300 as sessionbin, count() as sessioncount from table group by round(sessiontime/300)300 order by session_bin 3) SELECT t1.country AS country_a, t2.country AS country_b FROM ( SELECT country, COUNT(*) AS session_count FROM yourtablename GROUP BY country ) AS t1 JOIN ( SELECT country, COUNT(*) AS session_count FROM yourtablename `GROUP BY countr"See full answer

Saket S. - "I will use the following approach for this situation: Understand Current Status of the Program: Program Goals, Schedule, How many teams, what are their deliverables, dependencies between teams Team level view of progress: Through tools like Burn down charts, Gantt charts etc. Identify laggards (lagging teams). Trend analysis for lagging teams: Understand at what point, the decline started. If the decline has started around same time, then following may be the potential issues: -"See full answer

Anjesh D. - "I had multiple RCA to complete and each one had a deadline but the process to complete them wasn't streamlined which cause some of them to miss SLA and point of contact felt frustrated as she has no information to give to customer. I received feedback that what blocked me to move forward on those and how can I do better next time?"See full answer

Rick E. - " from typing import List def getnumberof_islands(binaryMatrix: List[List[int]]) -> int: if not binaryMatrix: return 0 rows = len(binaryMatrix) cols = len(binaryMatrix[0]) islands = 0 for r in range(rows): for c in range(cols): if binaryMatrixr == 1: islands += 1 dfs(binaryMatrix, r, c) return islands def dfs(grid, r, c): if ( r = len(grid) "See full answer

Yag S. - "I studied Exponent's TinyURL system design video. My interviewer was asking many detailed questions on API design, schema, as well as data required to store. I found system design questions are bit high level instead of depth. I think should have detail design of API, schema and some additional flavors."See full answer