Samsung Interview Questions, Process, and Tips

Q1. Information about us
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Q2. Information about household members
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Q3. Qualification related information
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Q4. Work experience Information
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Q1. What is power circuit board
Ans. 
A power circuit board is a board that distributes electrical power to various components in a system.
• Power circuit boards are used in various electronic devices to regulate and distribute power.

• They contain components such as resistors, capacitors, and transistors to control the flow of electricity.

• Power circuit boards are commonly found in computers, televisions, and other electronic devices.

• They play a crucial role i...read more
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Round duration - 120 Minutes
Round difficulty - Medium

This was an online coding round where we had 3 questions to solve under 120 minutes. The questions were of medium to hard difficulty level.

Q1. 
Trapping Rain Water Problem Statement
You are given a long type array/list ARR of size N, representing an elevation map. The value ARR[i] denotes the elevation of the ith bar. Your task is to determine th...read more
Ans. 
Calculate the total amount of rainwater that can be trapped between given elevations in an array.
• Iterate through the array and calculate the maximum height on the left and right of each bar.

• Calculate the amount of water that can be trapped above each bar by taking the minimum of the maximum heights on the left and right.

• Sum up the trapped water above each bar to get the total trapped water for the entire array.
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Q2. 
Shortest Path in a Binary Matrix Problem Statement
Given a binary matrix of size N * M where each element is either 0 or 1, find the shortest path from a source cell to a destination cell, consisting only...read more
Ans. 
Find the shortest path in a binary matrix from a source cell to a destination cell consisting only of 1s.
• Use Breadth First Search (BFS) algorithm to find the shortest path.

• Initialize a queue with the source cell and keep track of visited cells.

• Explore all 4 directions from each cell and update the path length accordingly.

• Return the shortest path length or -1 if no valid path exists.
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Q3. 
Count Leaf Nodes in a Binary Tree
Count the number of leaf nodes present in a given binary tree. A binary tree is a data structure where each node has at most two children, known as the left child and the...read more
Ans. 
Count the number of leaf nodes in a binary tree.
• Traverse the binary tree and count nodes with both children as NULL.

• Use recursion to traverse the tree efficiently.

• Handle base cases where the node is NULL or a leaf node.

• Keep track of the count of leaf nodes as you traverse the tree.
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Round duration - 60 Minutes
Round difficulty - Medium

In this round I was first asked 2 questions related to DSA where I was expected to first explain my approach to the interviewer along with proper complexity analysis and then code the implementation in any of my preferred IDE. This was followed by some questions related to OOPS and C++.

Q1. 
Find The Repeating And Missing Number Problem Statement
You are provided with an array nums which contains the first N positive integers. In this array, one integer appears twice, and one integer is missi...read more
Ans. 
Given an array of first N positive integers with one number repeating and one missing, find the repeating and missing numbers.
• Iterate through the array and keep track of the sum of elements and sum of squares to find the missing and repeating numbers.

• Use a set to identify the repeating number and calculate the missing number based on the sum of elements.

• Example: For nums = [1, 2, 3, 4, 4, 5], the repeating number is 4
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Q2. 
Count Pairs with Given Sum
Given an integer array/list arr and an integer 'Sum', determine the total number of unique pairs in the array whose elements sum up to the given 'Sum'.
Input:
The first line c...read more
Ans. 
Count the total number of unique pairs in an array whose elements sum up to a given value.
• Use a hashmap to store the frequency of each element in the array.

• Iterate through the array and for each element, check if (Sum - current element) exists in the hashmap.

• Increment the count of pairs if the complement exists in the hashmap.

• Divide the count by 2 to avoid counting duplicates like (arr[i], arr[j]) and (arr[j], arr[i])
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Q3. What is the difference between a structure and a union, and what are the pros and cons of both?
Ans. 
Structure and union are both used to group different data types, but structure allocates memory for each member separately while union shares the same memory space for all members.
• Structure allocates memory for each member separately, while union shares the same memory space for all members.

• Structures are used when each member needs its own memory space and unions are used when only one member is accessed at a time.

• Str...read more
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Q4. How does C++ support polymorphism?
Ans. 
C++ supports polymorphism through virtual functions and inheritance.
• C++ supports polymorphism through virtual functions and inheritance

• Virtual functions allow a function to be overridden in a derived class

• Base class pointers can point to derived class objects, allowing for dynamic binding

• Example: class Animal { virtual void speak() { cout << 'Animal speaks'; } }; class Dog : public Animal { void speak() { cout &l...read more
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Round duration - 60 Minutes
Round difficulty - Medium

This round had 3 questions from DSA which I had to code under 60 minutes and then the interviewer asked some questions from Operating Systems and Android as I did a project in Mobile App Development.

Q1. 
Spiral Order Traversal of a Binary Tree
Given a binary tree with N nodes, your task is to output the Spiral Order traversal of the binary tree.
Input:
The input consists of a single line containing elem...read more
Ans. 
Implement a function to return the spiral order traversal of a binary tree.
• Traverse the binary tree level by level, alternating between left to right and right to left.

• Use a queue to keep track of nodes at each level.

• Append the values of nodes in each level to the result list in the desired order.
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Q2. 
Stack using Two Queues Problem Statement
Develop a Stack Data Structure to store integer values using two Queues internally.
Your stack implementation should provide these public functions:
Explanation:
...read more
Ans. 
Implement a stack using two queues to store integer values with specified operations.
• Create a stack class with two queue data members.

• Implement push(data) by enqueuing the data into one of the queues.

• Implement pop() by dequeuing all elements from one queue to another until the last element is reached and return it.

• Implement top() by dequeuing all elements from one queue to another until the last element is reached, ret...read more
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Q3. 
Convert a Binary Tree to its Sum Tree
Given a binary tree of integers, convert it to a sum tree where each node is replaced by the sum of the values of its left and right subtrees. Set leaf nodes to zero.
...read more
Ans. 
Convert a binary tree to a sum tree by replacing each node with the sum of its left and right subtrees.
• Traverse the tree in postorder fashion.

• For each node, calculate the sum of its left and right subtrees and update the node value.

• Set leaf nodes to zero.

• Return the level order traversal of the modified tree.
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Q4. What is meant by multitasking and multithreading in operating systems?
Ans. 
Multitasking refers to the ability of an operating system to run multiple tasks concurrently, while multithreading involves executing multiple threads within a single process.
• Multitasking allows multiple processes to run simultaneously on a single processor, switching between them quickly.

• Multithreading enables a single process to execute multiple threads concurrently, sharing resources like memory and CPU.

• Multitasking...read more
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Q5. What is Android?
Ans. 
Android is a mobile operating system developed by Google, based on the Linux kernel and designed primarily for touchscreen devices.
• Developed by Google

• Based on Linux kernel

• Designed for touchscreen devices
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Q1. What's your skill
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Q2. Tell me about your self
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Q3. Why are you intrested in this job
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Q4. Tell me about an experiance when you faced difficulty at working on a project
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Q5. What are your strenghts and weakness
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Q6. Where do you see yourself in the next 5 year
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Q7. Would you like to work overtime or odd hours
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Q1. Tell me about yourself.
Ans. My name is sweety Rajoriya and I am 21 year old. for the past 1 year, I've been working as a Data entry at company Om service. i am graduate i have just completed my studies
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Q1. What is the CDU,RDU? How many types card used in CDU And RDU?, Which port is used for login ?
Ans. 
CDU and RDU are types of card readers used in LSMR engineering. Login is done through a specific port.
• CDU stands for Card Dispenser Unit and RDU stands for Card Reader Unit.

• CDU and RDU are used in LSMR engineering for reading and dispensing cards.

• There are different types of cards used in CDU and RDU, such as magnetic stripe cards and EMV chip cards.

• The port used for login depends on the specific system and configurati...read more
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