Apple计算机科学面试真题

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全部(431)
OOD(25)
Algorithm(139)
System Design(217)
高频题(0)
Math(13)
1.设计一个list
2.设计一个数据结构
3.Generating All Full Binary Trees with N Nodes
4.Word Search II on a Board
5.Length of strings
6.Union
7."Flood Fill Algorithm"
8."Pattern Matching with Insertions"
9.Palindrome Number Check
10.Counting Primes Less Than N
11.Sudoku_Solver
12.Text Justification Algorithm
13.Discuss a project from your resume that the hiring manager finds interesting, including challenges faced.
14.Solve a complex, multi-step graphics-related problem.
15.Describe a system you have implemented and how you would present it to a colleague who is taking over.
16.Discuss your knowledge of C++ basics, graphics, and animation.
17.Outline the types of questions and discussions you had with different interviewers during the Apple (Mystery Product) System EE onsite interview.
18.Discuss the technical and behavioral questions you encountered during the Apple iPhone (Analog) System EE interview process.
19.Explain the role and responsibilities of a system EE within a team that handles hardware planning, mainboard design, and product validation.
20.Describe the process and considerations for integrating a camera sensor and SoC into a PCB for a product that requires photography capabilities.
21.Sorting Algorithm Explanation
22.Binary Tree Traversal
23.Memory Management in C++
24.General Characteristics of 3D Rotation Matrix
25.Identify the Rotation Matrix
26.Characteristics of 3D Rotation Matrix
27.3D Mathematics - Dot and Cross Product
28.Find the next multiple of 8
29.Hexadecimal representation
30.Calculate the power of 2
31.Merge Intervals
32.Design an Elevator Management System
33.Design a Distributed Delay Queue
34.Implement LRU Cache
35.Design a Payment System
36.Design a Counter Class
37.Design a Rate-Limiting System
38.Design a System for Searching Images
39.Binary Tree Row-wise Sorting
40.Implement a Queue Class
41.Understanding of High Concurrency and Redis Solution
42.Top K Timestamps from Data Stream
43.Implement a class for data stream average calculation
44.Designing 'Find My Friends' Backend Service
45.3Sum Less Than Target
46.Tic Tac Toe Win Condition
47.Command Set Processing
48.Interesting Course
49.Favorite Programming Language
50.Binary Tree 2-Sum
51.Array Sorting and Deduplication
52.Implement a Box Filter in C++
53.Bitwise Operation to Swap Even and Odd Bits
54.Implement a Hash Map in C
55.Design a Data Structure for Image Compression
56.Number of Continuous Pixel Value Regions
57.System Design for Data Validation
58.System Design for Log Collection and Error Diagnosis
59.Interval Merge Coding Problem
60.Design a JSON Structure for API Data Transmission
61.LeetCode Easy Problem
62.Explain Spring Boot related concepts
63.Discuss Java 8 features
64.Prefix Sum Problem
65.Code Review Exercise
66.Database Schema Design for a Subscription Feature
67.Least Recently Used (LRU) Cache Implementation
68.Dynamic Programming Problem
69.Longest Line of Points in 2D Space
70.Sliding Window Problem
71.Binary Search Problem
72.Find the First Index in a Sorted Array with Repeated Values
73.Print Leaf Node Values
74.Python Coding Challenge
75.Design a Weather Prediction System
76.Code Review for Merging Two Sorted Arrays
77.System Design for Large-scale Word Ladder
78.Merge K Sorted Lists
79.LRU Cache Implementation
80.Airline Ticket Cost Estimation Tool
81.Test Case Design: Testing a Specific App Page
82.Troubleshooting: QA Environment Down, Browsers Not Affected
83.Problem-Solving: Finding the Unique Number in an Array
84.Problem-Solving: Identifying the Odd Image Out
85.Design Question: How to Test a Pen
86.Check if two strings are anagrams.
87.Java Iterator Implementation with Skip Feature
88.Trie Search with Graph Output
89.Sentence Permutations
90.2D Matrix Word Search
91.2D Matrix Transpose
92.Array Permutation
93.Linear Algebra Knowledge
94.3D Mathematics Knowledge
95.C++ Knowledge and Implementation
96.Implement a JSON Parser
97.Design ML Feature Store
98.Design Airflow
99.Design an Uber dynamic pricing system
100.Types of Control Flow in Java
101.TCP Handshake Process
102.HTTP Return Codes
103.Thread vs Process
104.Differences between TCP and UDP
105.Implement getExponent Function
106.Prime Factorization with a Given List of Primes
107.Implement Trie with Frequency-Based Top N Words
108.Design a File Scanning System
109.Design a Thread-Safe HashMap
110.Implement a Search Function
111.Function to Check Prime Number
112.Implement a Least Recently Used (LRU) Cache
113.System Design for URL Shortener
114.Generate a Mock JSON Response Based on a Given JSON Schema
115.Find the maximum value in each row of a tree
116.Identify and resolve deadlock in code
117.Design a kernel with energy constraints and real-time constraints
118.Difference between mutex and semaphore
119.Most Frequent Pattern in a Sentence
120.Fibonacci Sequence Algorithm
121.Wired/Pinned Pages
122.Page Sizes and Their Trade-offs
123.Process vs. Threads
124.Worker Thread Quantity for User Demand
125.Multicore Scheduling Methods
126.Preventing Priority Inversion
127.Ensuring Critical Tasks Run in Kernel
128.Differences Between Preemptive and Cooperative Scheduling
129.Scheduling Quantum Design Considerations
130.Describe interrupts and when to mask them
131.Job Scheduler System Design
132.Ring Cache Implementation
133.String Justification
134.Sort an Array with Two Distinct Elements
135.Application Response to Mouse Actions
136.Mouse Click Application Detection
137.Mouse Interaction Without Interrupts
138.Operating System Layers
139.Mouse Movement Mechanism
140.Minimal Truck Weight Optimization
141.Explain the Kogge-Stone adder and logic effort for gate sizing.
142.Discuss methods to reduce circuit power consumption.
143.Explain bandgap reference and its applications.
144.Discuss the behavior of MOSFET current at different temperatures and the effect of gate voltage on total capacitance.
145.Identify and explain various bias circuits.
146.Describe the differences between a folded cascode amplifier and a telescopic amplifier.
147.Explain basic CMOS physics and current equations.
148.Topological Traversal of a Graph
149.Detail the pass manager
150.Explain data flow analysis
151.Discuss the projects listed on your resume
152.Service for Image Search
153.Design a file system
154.Implement message passing between computers
155.Implement a Module from a Given Paper
156.Design Functions for a Directed Graph
157.Bipartite Graph Determination
158.Debugging Approach
159.Hash Table Implementation
160.Migrate a Local Project to Production
161.Design a Service to Push High Priority Jira Bug Tickets to Slack
162.Design a Service Similar to GitHub Focusing on Infrastructure
163.Design a System to Validate a Poker Card Shuffle
164.Generate Random Email and Phone Numbers
165.Troubleshoot a Subnet ACL Issue
166.Design a Feature for Synchronizing Wi-Fi Passwords Between Mac and iPhone
167.How do you handle hashcode collisions in a hashmap?
168.How is a mutable array implemented?
169.What is a race condition?
170.What is a deadlock and how can you create one?
171.Generate All Permutations of a List with Constraints
172.Implement Red-Black Trees and Hashmaps
173.Implement Negative Cache
174.Implement a Deadlock
175.Algorithm Problem Solving
176.Explain a Rotation Matrix
177.Vector Rotation with a Rotation Matrix
178.Meaning Behind Dotting Two Vectors
179.Store and Find Unique Binary Files
180.Design a Package Manager Tool
181.Simulate an Interpreter with Edge Case Handling
182.Task Scheduler Optimization
183.Count Valid Examples Based on Rules
184.Handle Edge Cases in Kth Largest Element Algorithm
185.Implement a Tail Command for Large Files
186.Trie Implementation and Result Deduplication
187.String Character Frequency Comparison
188.LRU Cache Scaling
189.System Design for Task Assignment
190.Compare Version Numbers
191.2Sum Problem
192.Sort a list of strings representing numbers
193.Describe Signal Handlers
194.Explain Virtual Memory
195.Reverse a Linked List Using Iterative Method
196.Diagnosing Long-Running Reduce Jobs in MapReduce
197.Ensuring Key Consistency in Shuffling for MapReduce
198.Calculating RF Feedback
199.Deriving DSP Feedback Loop
200.Sensor Specification Assessment
201.Implementing LPF with Switched Capacitor and Probe Compensation
202.Measuring Capacitance and Designing RF Spectrum Analyzer
203.LED Driver Output Current Control
204.Analyze an Amplifier Circuit
205.Memory Offset Copy
206.Nested Dictionary Element Access
207.C Code Data Alignment Issue
208.Palindrome Problem
209.Differences between semaphore and mutex
210.Differences between git merge and rebase
211.Experience with Memory Overflow
212.Memory Leak Identification and Prevention
213.Differences between stack and heap in terms of data structure
214.Top K Largest Numbers in a Stream
215.Word Search 2 Implementation with an Additional Data Structure
216.URL Shortening Service
217.Autocomplete System Design
218.Suffix Array Problem
219.Debugging with GDB
220.RC Network Step Response and Pole-Zero Analysis
221.Feedback & Non-linearity in Circuits
222.Sample and Hold Circuit Noise Behavior
223.Analyze Current Bias Common Stage Output Noise
224.Longest Valid Parentheses
225.Jump Game Variant: Minimum Jump Steps
226.Substring Removal from a String
227.Processing Large Files That Do Not Fit in Memory
228.Sentence Reversal by Words
229.Path Counting in a Grid
230.Permutations with Duplicates Optimization
231.Design a Bookshelf System
232.Two Sum Problem
233.Number of Islands
234.Reverse Words in a String
235.Describe the operation of an opamp circuit with specific configurations and sketch the transfer function versus frequency without using equations.
236.Squares of a Sorted Array
237.Unique Number of Occurrences
238.Valid Parentheses
239.Implement Heap Constructor and Add Function
240.Design a Parking Lot using Object-Oriented Design
241.Anagram Strings Function in Python
242.Find Index with Equal Sum on Both Sides
243.Storing JSON Files
244.ArrayList Addition
245.Reverse an ArrayList
246.Code Review and Software Engineering Best Practices
247.Derivative and Gradient Descent Implementation
248.Android Unlock Patterns
249.Refactor Rock-Paper-Scissors Code
250.Explain the purpose and usefulness of the circuit
251.Calculate the time for Vx to settle and the time constant
252.Determine the settled value of Vx(t) as time approaches infinity
253.Sketch the voltage Vx(t) over time
254.Describe the operation of the given circuit
255.Coding Questions
256.Objective-C Knowledge
257.Calculator Implementation
258.Design a Mobile API for Backend Interaction
259.Design a Data Structure with O(1) Operations
260.Design an Online Book Reader App
261.Solve a deadlock problem using concurrency
262.Implement a bitmap using C
263.Intersection of Two Arrays Using Binary Search
264.Explanation and examples of testing frameworks
265.Identifying problems in images
266.Challenges in depth mode for camera systems
267.Identify potential issues with Face ID technology
268.Object-Oriented Concepts in C++
269.ASIC Flow and Digital Verification Concepts
270.Understanding of CPU Pipeline and Timing Analysis
271.Verilog Design and Testbench Creation
272.Design a Transistor Level Circuit
273.Explain Leakage Power and Timing Analysis in VLSI and CMOS
274.Power Consumption in Circuits
275.Sense Amplifier Design and Offset
276.Discuss Bandgap Reference
277.Explain GIDL and its relationship with threshold voltage changes
278.Optimize Algorithm Performance
279.RTOS Synchronization
280.Designing Data Handling for Limited SPI Interrupts
281.Writing an Interrupt Service Routine (ISR)
282.Utilizing SP and PC Register Information
283.Debugging a System with Occasional Hangs
284.Embedded System Interrupt Procedure
285.Understanding Hex Number Layout in Memory
286.Explain big endian and little endian.
287.Where is a static variable saved in memory?
288.Golf Puzzle
289.Frequency Divider Flip-Flop Connection Issue
290.Minimum Gate Resistor Value Calculation
291.Difference Between Flip-Flop and Latch
292.Battery Management System (BMS) Modules
293.Design Problem: Battery Voltage Level Cut-off
294.Determining ADC Sampling Frequency
295.Switching Loss in Buck Converter
296.Identify Op-Amp Configuration
297.RC Charging Step Response
298.Function and Calculation of ADC
299.Explain Inverting and Non-Inverting Op-Amps
300.How would you design a text editor that supports input, deletion, and cursor movement?
301.What is the difference between inheritance and composition?
302.What is Endianness?
303.How would you debug a slow-loading webpage?
304.What is the result of a binary number XORed with itself?
305.What happens after you enter a URL in the browser?
306.Coding and OOP Design Question from Apple Interview
307.Implementing a Hash Map
308.Permutation (In Place)
309.Discuss your experience with C++ and related concepts.
310.Discuss your approach to building and optimizing engineering projects.
311.Explain How Hashmap Works
312.Debugging High Latency in a Service
313.Design a Key-Value Store
314.Number of Islands
315.Front-end System Design: Apple Contacts List
316.Front-end System Design: Auto-complete Search Box
317.Front-end Coding Challenge
318.Understanding Mipmaps
319.Basics of Computer Graphics
320.Implementation and Application of Queues
321.Displacement of Water by a Stone
322.Closed Room with an Operating Refrigerator
323.Temperature Selection for Heat Treatment
324.Material Selection for Structural Support
325.Rotational Force Balance
326.Stress-Strain Curve Analysis
327.Torsion Balance on a Rod
328.Design and Stress Analysis for Mobile Devices
329.Technical Fundamentals Assessment
330.iPod Battery Door Design
331.Mechanical Property Exploration of Laminated Sheets
332.Design a Home Button Mechanism
333.Humanize Byte Function Implementation
334.Reverse String with Ordered Digits
335.Pseudocode for Python dictionary keyword search.
336.Impact of buffering the clock or adding delay to the master latch's clock on setup-hold time requirements.
337.Describe the operation of a master-slave latch flip-flop.
338.Compare the delay and Elmore delay of a NAND2 and a NAND5 sized with the same transistor width.
339.Effects of setting all MOS transistors to the same width in a NAND5.
340.Sizing a NAND2 for a balanced inverter with a given PN ratio.
341.Plot the Vout-Vin curves for an inverter with a weaker NMOS and explain the changes.
342.Plot the Vout-Vin curves for an inverter as described previously.
343.Describe the MOS operation region transition for an inverter with rising input.
344.Software Testing Engineer for FaceID
345.System Testing Engineer Questions
346.Communication Certification Engineer Questions
347.Bluetooth Protocol Knowledge
348.Develop WiFi Test Cases
349.Design a Testing Framework
350.Object-Oriented Programming in Data Science Interviews
351.Multithreading Problem - LeetCode 1115
352.Difference Between Thread and Process
353.HashMap Find Repeat Element
354.Minimizing Random Error Due to Mismatch in Current Mirror
355.Reducing Systematic Error in Current Mirror
356.Phase Inversion Phenomenon in BJT Input Pair
357.Voltage Waveform in NMOS Common Source
358.RC Network Voltage Change
359.Implementing std::function
360.C++ Library Development Considerations
361.Why are matrix operations faster on a GPU than a CPU?
362.Why is C faster than Python?
363.Design a Job Scheduler
364.Maximum Sum Rectangular Submatrix
365.Palindrome Subsequence Count
366.Traditional Computer Vision Problems
367.Graph Coloring Problem
368.Zigzag Iterator
369.iMac Display Stand Design
370.Cantilever Beam Improvement
371.Minimum Height Trees
372.LRU Cache Implementation
373.Decode String
374.Endianness Detection Code
375.Multi-core Load Balance Implementation
376.Multi-thread and Multi-core Related Questions
377.Improving Image & Video Quality
378.Computer Vision with Random Variables
379.Computer Vision Coding Challenge
380.Design an Autocomplete System
381.Design a Data Structure for Storing and Indexing 2D Coordinates of Stores
382.Python and C++ Basic Concepts
383.System Design Concepts
384.Python Dictionary Key Issue
385.Find the Cycle in a Graph
386.Meeting Room Scheduling
387.Work-related Scenario Question
388.Find 2nd Largest Number in an Array
389.Describe the deployment process for CI/CD and the different deployment methods.
390.Find the First Unique Element in an Array
391.Finite State Gradient Function
392.Simple Triangular Shape Print
393.Debugging a Website Access Issue
394.Object-Oriented Design for Chess Game
395.System Design for Data Visualization
396.System Design for Log Collection
397.Tic-Tac-Toe Board Evaluation
398.Design a Language Model Similar to a Deck of Cards
399.Longest Substring Without Repeating Characters
400.How to securely store user keys for encrypted transmission without exposing the actual keys?
401.Deadlock Explanation and Resolution
402.Considerations for a Read-Heavy System
403.Panorama Photo Stitching Implementation
404.Implement Image Histogram
405.Optimize Box Filter Using Metal
406.Implement Box Filter in C
407.Implement 2D Image Convolution in C
408.Return K Shortest Phonetic Combinations
409.Detect Invalid Input Using Trie
410.LeetCode Dice Roll Simulation
411.Java Iterator Usage
412.Kernel-Related Questions
413.Concurrency Concepts
414.Sliding Window Technique
415.Clone Graph Problem
416.Image Processing and Filtering Techniques
417.Design a Car Rental System
418.Minimum Number of Treats to Take in a Given Time
419.Minimum Number of Treats to Take in Given Time
420.Technical Questions on Mechanical Engineering
421.Design Challenge: Battery Door
422.Describe your proudest mechanical project
423.Simplified Inversion Pair Problem
424.Inverse Function Character Compression
425.Character Expansion
426.Design a Search Recommendation System
427.Longest Increasing Subsequence with Gap Constraint
428.Find the Largest Palindromic Number
429.Implement an on-disk key-value store with specific features
430.Understanding of Computers
431.Algorithm Trade-offs in Memory-Constrained Environments
1. 设计一个list
设计一个list支持addLast(E e)(O (1)),delete(E e)(O(1)delete某个元素第一次出现的位置),contains(E e)(O(1)),和printList(O(n))
2. 设计一个数据结构
design一个datastructure that can store objects having dependencies on each other, each objects has its own hashcode 
and children. When information stored in an object changes, it needs to inform any other objects connect to it.
3. Generating All Full Binary Trees with N Nodes
Given an integer n, return a list of all possible full binary trees with n nodes. Each node of each tree in the answer must have Node.val == 0.

Each element of the answer is the root node of one possible tree. You may return the final list of trees in any order.

A full binary tree is a binary tree where each node has exactly 0 or 2 children.

 

Example 1:

Input: n = 7
Output: [[0,0,0,null,null,0,0,null,null,0,0],[0,0,0,null,null,0,0,0,0],[0,0,0,0,0,0,0],[0,0,0,0,0,null,null,null,null,0,0],[0,0,0,0,0,null,null,0,0]]

Example 2:

Input: n = 3
Output: [[0,0,0]]

 

Constraints:

  • 1 <= n <= 20
4. Word Search II on a Board
Given an m x n board of characters and a list of strings words, return all words on the board.

Each word must be constructed from letters of sequentially adjacent cells, where adjacent cells are horizontally or vertically neighboring. The same letter cell may not be used more than once in a word.

 

Example 1:

Input: board = [["o","a","a","n"],["e","t","a","e"],["i","h","k","r"],["i","f","l","v"]], words = ["oath","pea","eat","rain"]
Output: ["eat","oath"]

Example 2:

Input: board = [["a","b"],["c","d"]], words = ["abcb"]
Output: []

 

Constraints:

  • m == board.length
  • n == board[i].length
  • 1 <= m, n <= 12
  • board[i][j] is a lowercase English letter.
  • 1 <= words.length <= 3 * 104
  • 1 <= words[i].length <= 10
  • words[i] consists of lowercase English letters.
  • All the strings of words are unique.
5. Length of strings
给两个字符串,要求返回true/false这两个字符串是否满足:所有的字符都拥有相同数量.比如:"tea thh""hth aet"是返回true,"abcdz"和"abcdd"就返回false