Apple Sdet Interview Questions and Answers

I am currently working with Java and Selenium for test automation.

• Using Java programming language for writing test scripts

• Using Selenium WebDriver for automating web applications

• Integrating with CI/CD tools like Jenkins for continuous testing

• Working with frameworks like TestNG for test management

• Using tools like Maven for project management

Find the maximum subsequent distinct and contiguous subarray in a character array.

• Use a sliding window approach to iterate through the array.

• Keep track of the distinct characters in the current subarray.

• Update the maximum length and subarray as necessary.

Create a stack using 2 given queues.

• Push elements into one queue until it is full.

• When the first queue is full, push new elements into the second queue.

• To pop an element, remove all elements from the non-empty queue except the last one.

• Switch the non-empty queue to the other one when it becomes empty.

A test framework should have features like test case management, test data management, reporting, and integration with CI/CD tools.

• Test case management: Ability to create, organize, and execute test cases.

• Test data management: Ability to manage test data and generate test data sets.

• Reporting: Ability to generate detailed test reports with metrics and logs.

• Integration with CI/CD tools: Ability to integrate with tools li...read more

To check if each page of Amazon.com has its logo, we can use automated testing with Selenium WebDriver.

• Use Selenium WebDriver to navigate to each page of Amazon.com

• Locate the logo element on each page using its XPath or CSS selector

• Verify that the logo element is displayed on each page

Yes, I have worked on automation frameworks.

• I have experience in developing and maintaining automation frameworks using tools like Selenium, TestNG, and Cucumber.

• I have also worked on customizing existing frameworks to meet specific project requirements.

• I am familiar with both data-driven and keyword-driven frameworks.

• I have integrated automation frameworks with CI/CD pipelines for continuous testing.

• One example of a p...read more

When entering a URL and hitting enter, the browser performs DNS lookup, establishes a TCP connection, sends an HTTP request, receives the response, and renders the page.

• Browser performs DNS lookup to resolve the domain name to an IP address

• Browser establishes a TCP connection with the server

• Browser sends an HTTP request to the server

• Server processes the request and sends back an HTTP response

• Browser receives the respon

Reverse every 3 nodes in a singly linked list using recursion.

• Create a recursive method that takes the head of the linked list as input.

• If the head is null or there are less than 3 nodes remaining, return the head.

• Reverse the first 3 nodes by swapping their pointers.

• Recursively call the method on the next 3 nodes and update the pointers accordingly.

• Return the new head of the reversed linked list.

1. Time management 2. Public speaking 3. Learning new technologies

• Struggling with time management, often missing deadlines

• Nervous when speaking in front of large groups

• Finding it challenging to keep up with the latest technologies in the field

Implement 3 stacks in a single array efficiently

• Divide the array into 3 equal parts

• Use pointers to keep track of top of each stack

• Implement push and pop operations for each stack

• Handle stack overflow and underflow cases

To find a given integer in a circularly sorted array of integers, use binary search with slight modifications.

• Find the middle element of the array.

• If the middle element is the target, return its index.

• If the left half of the array is sorted and the target is within that range, search the left half.

• If the right half of the array is sorted and the target is within that range, search the right half.

• If the left half is not...read more

Program to find depth of binary search tree without recursion

• Use a stack to keep track of nodes and their depths

• Iteratively traverse the tree and update the maximum depth

• Return the maximum depth once traversal is complete

Find the maximum rectangle (in terms of area) under a histogram in linear time

• Use a stack to keep track of the bars in the histogram

• For each bar, calculate the area of the rectangle it can form

• Pop the bars from the stack until a smaller bar is encountered

• Keep track of the maximum area seen so far

• Return the maximum area

Implement spelling and word suggestions for full keyboard phones

• Create a dictionary of commonly used words

• Use algorithms like Trie or Levenshtein distance to suggest words

• Implement auto-correct feature

Recursive mergesort divides array into halves, sorts them and merges them back. O(nlogn) runtime.

• Divide array into halves recursively

• Sort each half recursively using mergesort

• Merge the sorted halves back together

• Runtime is O(nlogn)

• Iterative version can be written using a stack or queue

To determine if someone has won a game of tic-tac-toe on a board of any size, we need to check all possible winning combinations.

• Create a function to check all rows, columns, and diagonals for a winning combination

• Loop through the board and call the function for each row, column, and diagonal

• If a winning combination is found, return the player who won

• If no winning combination is found and the board is full, return 'Tie...read more

Replace each number in an array with the product of all other numbers without using division.

• Iterate through the array and calculate the product of all numbers to the left of the current index.

• Then, iterate through the array again and calculate the product of all numbers to the right of the current index.

• Multiply the left and right products to get the final product and replace the current index with it.

Create a cache with fast look up that only stores the N most recently accessed items

• Implement a hash table with doubly linked list to store the items

• Use a counter to keep track of the most recently accessed items

• When the cache is full, remove the least recently accessed item

To design a search engine with keyword-based document indexing and numeric attributes, we need to build appropriate indices.

• Create an inverted index for each keyword, mapping it to the documents that contain it

• For numeric attributes, use a B-tree or other appropriate data structure to store the values and their associated documents

• Combine the indices to allow for complex queries, such as keyword and attribute filters

• Co...read more

Program to find intersection of words in two files

• Read both files and store words in two arrays

• Loop through one array and check if word exists in other array

• Print the common words

Given a 2D array of alphabets and a function to check valid English words, find all possible valid words adjacent to each other.

• Create a recursive function to traverse the 2D array and check for valid words

• Use memoization to avoid redundant checks

• Consider edge cases such as words with repeating letters

• Optimize the algorithm for time and space complexity

Insert a node at its correct position in a circular linked list containing sorted elements.

• Traverse the linked list until the correct position is found

• Handle the case where the value to be inserted is smaller than the smallest element or larger than the largest element

• Update the pointers of the neighboring nodes to insert the new node

• Consider the case where the linked list has only one node