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Expected conditions are pre-defined conditions that can be used to wait for a certain state or element in Selenium.
ExpectedConditions.elementToBeClickable() - waits for an element to be clickable
ExpectedConditions.visibilityOfElementLocated() - waits for an element to be visible
ExpectedConditions.titleContains() - waits for the page title to contain a certain text
WebDriver is a tool for automating web applications. WebElement is an interface representing an HTML element.
WebDriver is a browser automation tool used to control the browser and interact with web elements
WebElement is an interface representing an HTML element on a web page
WebDriver interacts with web elements using the WebElement interface
Examples of web elements include buttons, text fields, and links
To wait for file loading in Selenium Automation, we can use explicit wait or thread.sleep() method.
Explicit wait is used to wait for a specific condition to occur before proceeding with the next step.
Thread.sleep() method is used to pause the execution for a specified amount of time.
We can also use the ExpectedConditions class to wait for a file to be loaded.
Waiting for a file to be loaded is important to ensure that t
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posted on 10 Mar 2015
Algorithm to find 2 numbers in an array whose sum is equal to a target integer
Use a hash table to store the difference between target and each element in the array
Iterate through the array and check if the current element exists in the hash table
Return the pair of elements that sum up to the target integer
Write a select statement to retrieve work of all users who belong to my team.
Join USERS and WORK tables on user_id
Join MANAGERS and USERS tables on team
Filter by manager_id
The manifest.json file contains the most important information of a Chrome extension.
The manifest.json file includes the version number, permissions, content scripts, background scripts, and other important details.
It is located in the root directory of the extension.
It is required for all Chrome extensions.
Example: "manifest_version": 2, "version": "1.0", "permissions": ["tabs", "storage"]
Hashtable is faster for finding an item than a sorted list.
Hashtable has constant time complexity O(1) for finding an item.
Sorted list has logarithmic time complexity O(log n) for finding an item.
Hashtable uses hashing to directly access the item's location.
Sorted list requires binary search to find the item's location.
Hashtable is ideal for large datasets with frequent lookups.
Sorted list is ideal for datasets that re
JSON and XML are the most popular data interchange formats when using APIs.
JSON (JavaScript Object Notation) is a lightweight format that is easy to read and write. It is widely used in web APIs.
XML (Extensible Markup Language) is a more complex format that is also widely used in web APIs.
Other formats include CSV (Comma Separated Values), YAML (YAML Ain't Markup Language), and Protocol Buffers.
Popular APIs for Social Commerce services
Facebook Graph API for social media integration
Instagram API for photo sharing and tagging
Twitter API for real-time updates and customer engagement
Pinterest API for product discovery and sharing
Google Maps API for location-based services
PayPal API for secure payment processing
Use a script to iterate through each HTML page, locate phone numbers, and update their format.
Write a script using a programming language like Python or JavaScript to iterate through each HTML page
Use regular expressions to locate phone numbers in the pages
Update the format of the phone numbers as needed (e.g. adding country code, changing separators)
Save the updated HTML pages with the new phone number format
Designing Google Suggest system
I would start by analyzing user search patterns and frequently searched keywords
Then, I would create a database of these keywords and their associated search results
I would use indexing services to quickly retrieve relevant results for each keyword
I would also implement machine learning algorithms to improve the accuracy of suggestions over time
Check if a number is a power of 2 and odd.
To check if a number is a power of 2, use bitwise AND operator with the number and its predecessor. If the result is 0, it is a power of 2.
To check if a number is odd, use modulus operator with 2. If the result is 1, it is odd.
Example code in Python:
def is_power_of_two(num):
return num & (num - 1) == 0
def is_odd(num):
return num % 2 == 1
By introducing new menu items, optimizing pricing strategy, and improving the overall dining experience.
Conduct a survey to understand the preferences of employees
Introduce healthy and affordable meal options
Offer discounts for bulk orders or loyalty programs
Partner with local vendors to source fresh ingredients
Improve the ambiance and seating arrangements
Implement online ordering and delivery services
Reviewing 30 million ads from 42 languages in Google AdWords and rejecting non-compliant ads requires a systematic approach.
Create a set of specific rules and guidelines for ad compliance
Use automated tools to filter out ads that violate the rules
Assign a team of reviewers to manually check the remaining ads
Ensure that the reviewers are fluent in the languages of the ads they are reviewing
Regularly update the rules and...
Multiple data structures are used to print nodes in a specific order. One data structure cannot be used alone.
The given order suggests a depth-first search traversal of a tree-like structure.
A stack can be used to keep track of the nodes to be visited.
A queue can be used to store the children of a node in the order they are visited.
An array can be used to store the nodes in the required order.
A linked list can be used ...
Find largest pen using minimum comparisons with tops.
Divide pens into two groups and compare largest pen from each group with largest top.
Repeat the process with the group containing the largest pen until only one pen is left.
The remaining pen is the largest pen.
Total number of comparisons required is 2n-3.
Given n dice with 'a' sides and sum b, return no. of ways to obtain b. Optimize time and space complexity.
Use dynamic programming to reduce time complexity
Create a 2D array to store the number of ways to obtain each sum for each number of dice
Use rolling arrays to optimize space complexity
Example: n=2, a=6, b=7 -> 6 ways to obtain sum 7
Example: n=3, a=4, b=8 -> 21 ways to obtain sum 8
Sort 128 GB data on 2 machines with 64 GB RAM each. Extend to 1000 machines.
Use external sorting algorithm like merge sort or quick sort
Divide data into smaller chunks and sort them individually
Merge sorted chunks using additional RAM
For 1000 machines, use distributed sorting algorithms like MapReduce or Hadoop
Ensure data consistency and fault tolerance in distributed sorting
posted on 22 Aug 2016
I applied via Campus Placement
posted on 2 Dec 2016
I applied via Campus Placement and was interviewed in Dec 2016. There were 6 interview rounds.
I applied via Referral
Find A-B of two sorted arrays A and B in O(m+n) time complexity.
Create two pointers, one for each array, and compare the elements at those pointers.
If the element in A is smaller, add it to the result array and move the A pointer forward.
If the element in B is smaller, move the B pointer forward.
Repeat until one of the pointers reaches the end of its array.
Add any remaining elements in A to the result array.
Time comple...
The routine should output the elements of the inorder traversal of a binary tree one by one in each call.
Implement an inorder traversal algorithm recursively
Use a global variable or pass a reference to keep track of the current element
Call the routine repeatedly to get the next element in each call
Program to find minimum semesters required to complete courses with prerequisites
Create a graph with courses as nodes and prerequisites as edges
Use topological sorting to find the order of courses to be taken
Calculate the minimum number of semesters based on the order obtained
Handle cases where there are cycles in the graph
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