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I was interviewed before Jun 2022.
To find the middle of a single linked list, use two pointers - one moving twice as fast as the other.
Use two pointers - slow and fast
Move slow pointer by one node and fast pointer by two nodes
When fast pointer reaches end, slow pointer will be at the middle
Vending machine design patterns involve creating efficient and user-friendly interfaces for purchasing products.
Consider using the Factory Method pattern to create different types of vending machines.
Implement the State pattern to manage the different states of the vending machine (e.g. idle, dispensing, out of stock).
Use the Observer pattern to notify the vending machine when products are restocked or when a purchase ...
To find the last k nodes from the end of a linked list, we can use a two-pointer approach.
Use two pointers, one starting at the head of the linked list and the other starting k nodes ahead.
Move both pointers simultaneously until the second pointer reaches the end of the linked list.
The first pointer will now be at the kth node from the end.
Intersection of linked list is finding the common node(s) between two linked lists.
Traverse both linked lists and store nodes in a set, then check for common nodes
Use two pointers approach to find the intersection point
If one list is longer, move the pointer of the longer list to the same distance from the end as the shorter list
The most common element in a string is the character that appears the most frequently.
Use a hashmap to store the frequency of each character in the string
Iterate through the string and update the frequency count in the hashmap
Find the character with the highest frequency in the hashmap
posted on 2 Dec 2016
I applied via Campus Placement and was interviewed in Dec 2016. There were 5 interview rounds.
Facebook is a social media platform that allows users to connect, share content, and communicate with others.
User registration and login system
Profile creation and customization
News feed algorithm to display relevant content
Friendship system to connect users
Messaging and chat functionality
Content sharing (posts, photos, videos)
Privacy settings and controls
Notifications and activity tracking
Advertising and monetization
What people are saying about Oracle
Oracle interview questions for designations
Get interview-ready with Top Oracle Interview Questions
I applied via Campus Placement and was interviewed before Jun 2020. There were 3 interview rounds.
I applied via Campus Placement and was interviewed before Jun 2020. There were 3 interview rounds.
I was interviewed before Jun 2021.
Round duration - 180 minutes
Round difficulty - Easy
It was an mcq + coding round. There were aptitude and ouput based question in mcq. And coding questions were easy
Given an integer array 'ARR' of size 'N' containing numbers from 0 to (N - 2). Each number appears at least once, and there is one number that appears twice. Yo...
Find the duplicate number in an array of integers from 0 to (N-2).
Iterate through the array and keep track of the frequency of each number using a hashmap.
Return the number with a frequency greater than 1 as the duplicate number.
Time complexity can be optimized to O(N) using Floyd's Tortoise and Hare algorithm.
You are provided with a string S
and an array of integers A
of size M
. Your task is to perform M
operations on the string as specified by the indices in array A
...
Given a string and an array of indices, reverse substrings based on the indices to obtain the final string.
Iterate through the array of indices and reverse the substrings accordingly
Ensure the range specified by each index is non-empty
Return the final string after all operations are completed
Round duration - 60 Minutes
Round difficulty - Easy
It was technical + hr round. there were 2 people as interviewer. They stated from intro and asked some basic puzzles and hr questions. After that they asked about my projects, technologies and some ds algo and dbms questions.
Tip 1 : Practice aptitude
Tip 2 : Focus on practicing coding
Tip 3 : Learn from mistakes
Tip 1 : Mention some projects that you have done
Tip 2 : Try to have skills that are required for the role
I applied via Campus Placement and was interviewed before Jul 2020. There were 3 interview rounds.
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