## SDE-2 Interview Questions

- 2of 2 votes
Design a movie ticket booking system like bookmyshow.com

Follow-up question -

1) How do you handle issues like scalability, concurrency, fault-tolerance etc.

2) Show movie theaters near to user where movie is playing and seats are available

3) Design database. What kind of DB would you use SQL or No-SQL

4) In real time how would you show which seats are booked which are free

5) If theaters do not have any api for fetching information then what can we do about it.

- 1of 1 vote
Design Uber. Low level Design needed (OOPS based - classes, relations, message flow etc.)

- 0of 0 votes
Design Cricinfo website

- 0of 0 votes
Design snake n ladder game to be played online

- 0of 0 votes
Given a movie X that the user had watched, write an algorithm to suggest more movies to the user. How to display the other movies based on same genre?

- 0of 0 votes
How to Design an Meeting scheduler

- 0of 0 votes
Implement a Message Broker, with Publisher and Subscriber. There can be multiple Topic or Subject in Message Broker.

- 0of 0 votes
Implement Thread safe timer with start, stop and reset functionality.

- -1of 1 vote
Find K which decides the number of open brackets are equal to the number of closed brackets.

input : (())

output : 2

Reason : if we divide the string at 2nd position, we get two open brackets and two closing brackets, and they are same .

input : (())))(

output : 4

Reason : if we divide the string(not necessarily equally) at 4rth position, we have (()) on the left side and on the right side we have ))( , as you can see, on the left half, we have two opening brackets and on the right half we have two closing brackets and they are equal .

input : ))

output : 2

Reason : there is no open brackets , so if we divide taking the whole string's length, we have )) on the left half and nothing on the right half. Now you can see that on the left half there is no open brackets and on the right half there is no closed brackets.

This question should be clear by now and remember you have to find out that K .

- 0of 0 votes
Find the Maximum number of distinct nodes in a binary tree path

- 0of 0 votes
find the given Binary tree is mirrored tree or not

should be like

60

/ \

30 30

/ \ / \

20 50 50 20

- 0of 0 votes
Given a BST (Binary Search Tree) , Each node value should replace with sum of the node which are greater-than the given node.

conditions :

No Extra space / variable can use

Modify the existing tree in optimal way.

- 0of 0 votes
Maximum triangle path Sum : Starting from the top of a pyramid of numbers like below, you can walk down going one step on the right or on the left, until you reach the bottom row:

55

94 48

95 30 96

77 71 26 67

One of such walks is 55 -> 94 >- 30 -> 26. You can compute the total of the numbers you have seen in such walk, in this case it’s 205.

Your problem is to find the maximum total among all possible paths from the top to the bottom row of the triangle. In the little example above it’s 321.

- 0of 0 votes
Design a online shipment tracking system.

- 0of 0 votes
Add 1 to the integer represented by a linked list with O(n) time, O(1) space, no recursion(stack space) and without reversing the linked list.

- 0of 0 votes
Design an OOP concept for an application where employee can dispatch their incoming phone call according to their seniority level if they are not able to solve.

- 0of 0 votes
Design a kind of kindle fire application where we can subscribe news channel and read the news from all publishers as a digital format.

- 0of 0 votes
Write a program to check whether it is a valid binary tree or not.

- 0of 0 votes
Multiply two numbers represented as a linked list.

- 0of 0 votes
A ‘plus’ pattern of size 1 is defined as following :

1

1 1 1

1

size 2 :

1

1

1 1 1

1

1

Find size of largest plus pattern in given 2D matrix which has only 0s &1s.

- 0of 0 votes
Given a sorted array which has been rotated n number of times. Find the value of n.

- 0of 0 votes
Clone the binary tree.

- 0of 0 votes
Return the maximum length sequence containing consecutive numbers from a binary tree.

90

/ \

1 66

/ \

2 67

/ \ /

5 4 68

/ \

99 100

Consecutive sequence of maximum length: [66, 67, 68] of length 3.

- 0of 0 votes
Implement Tower of Hanoi without using recursion.

- 0of 0 votes
A stepping number is defined as a number in which the absolute difference between the consecutive digits is not greater than 1, A stepping number cannot be a single digit number. You have to find the number of stepping numbers between n1 and n2 where n2 > n1 and n2, n1 > 0.

- 0of 0 votes
Given a stack of integers of size n, you have to sort it using only push and pop operations in O(1) space.

- 0of 0 votes
Given a tree return the number of elements for the level with the maximum elements.

- 1of 1 vote
Given an array it can be of 4 types

(a) Ascending

(b) Descending

(c) Ascending Rotated

(d) Descending Rotated

Find out which kind of array it is

- 0of 0 votes
Design a conference room booking system for a company which can have offices in multiple cities, each city can have multiple buildings, each building can have multiple floors, each floor can have multiple rooms. Each room can have features like capacitiy, video conferencing available, etc.

- 0of 0 votes
Design a kind of kindle fire application where we can subscribe news channel and read the news from all publishers as a digital format.