Publicis Sapient Software Development Engineer II Interview Questions and Answers

Q1. Explain over all experience
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Q2. Asked question on Core and advance java topic
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Q1. Some advance topic of Java
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Q2. DSA
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Q1. Salary expectation
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Q2. Relocation
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Q1. What is inheritance
Ans. 
Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.
• Allows for code reusability by creating a new class based on an existing class

• Derived class (subclass) inherits properties and behaviors from a base class (superclass)

• Can have multiple levels of inheritance, creating a hierarchy of classes

• Example: Animal class can be a base class with Dog and Cat
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Q2. What is polymorphism
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Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.
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Q3. Write a code for string reverse
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Code to reverse a string using array of characters
• Iterate through half of the string and swap characters from start and end

• Use a temporary variable to store the character being swapped

• Handle edge cases like empty string or single character string
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Q1. What is abstraction and how can we achieve it?
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Abstraction is the concept of hiding complex implementation details and showing only the necessary features to the outside world.
• Abstraction allows us to focus on what an object does rather than how it does it

• Achieved through abstract classes and interfaces in object-oriented programming

• Example: A car dashboard abstracts the internal workings of the car and provides only essential information to the driver
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Q2. Difference between hashtable and hashmap
Ans. 
Hashtable is synchronized, while hashmap is not. Hashtable does not allow null keys or values, while hashmap does.
• Hashtable is synchronized, while hashmap is not

• Hashtable does not allow null keys or values, while hashmap does

• Hashtable is a legacy class, while hashmap is a newer class
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Q3. How get() works insterally in hashmap
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The get() method in HashMap retrieves the value associated with a specified key.
• get() method takes a key as input and returns the value associated with that key in the HashMap.

• Internally, get() uses the hash code of the key to find the corresponding bucket in the HashMap.

• If multiple keys have the same hash code, get() uses the equals() method to find the correct key-value pair.
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Q4. What is normalization?
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Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization helps in minimizing data redundancy by dividing the database into multiple tables and defining relationships between them.

• It ensures data integrity by avoiding update anomalies and inconsistencies.

• There are different normal forms such as 1NF, 2NF, 3NF, BCNF, and 4NF, each with specific rules to fo...read more
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Q5. What are constraints?
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Constraints are limitations or restrictions placed on a system or process.
• Constraints define the boundaries within which a system must operate.

• They can include limitations on resources, time, or functionality.

• Examples of constraints in software engineering include memory limitations, processing speed, and input/output requirements.
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Q6. Write a query to get 3rd highest salary from the employee table
Ans. 
Query to retrieve the 3rd highest salary from the employee table
• Use the ORDER BY clause to sort salaries in descending order

• Use the LIMIT clause to retrieve the 3rd highest salary
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Q7. Write a code to get 2nd last node and its value from the singly linked list.
Ans. 
Traverse the linked list to find the 2nd last node and return its value.
• Traverse the linked list while keeping track of the current and previous nodes.

• Once at the end of the list, return the value of the previous node.
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Q8. You have an array of integer and retrieve the 2 smallest number from it without sorting the array.
Ans. 
Use two variables to keep track of the smallest and second smallest numbers in the array.
• Iterate through the array and update the variables accordingly.

• Initialize the variables with the maximum possible integer value to start with.

• Example: array = [5, 2, 8, 1, 3], smallest = 1, secondSmallest = 2.
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Q1. JavaScript advance interview questions
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Q2. Angular question and execution of scripts
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They will give you one topic and you want to speak about it .

Q1. Basic technical questions interviewer asked from your choosen questions. You can check interview questions from Google.
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Q2. As my language was Python. So questions vwas what is pass statement, continue and break statement,what are list and tupple, and then some advanced questions
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Q3. They also asked me puzzle 3 questions were asked .
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Q1. They mainly asked you situation based questions and from your project
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Round duration - 90 minutes
Round difficulty - Medium

Timing -12pm to 1:30pm
Test environment was good and we should keep in our mind about our net speed.

Q1. 
Reverse Array Elements
Given an array containing 'N' elements, the task is to reverse the order of all array elements and display the reversed array.
Explanation:
The elements of the given array need to...read more
Ans. Brute Force approach
• Initialise start and end indices with start = 0, end = N-1 where N is the total number of elements in array.
• We then run a loop while start < end and swap arr[start] with arr[end].
• Finally, we increment start and decrement end variable
Space Complexity: O(1)Explanation: Time Complexity: O(1)Explanation:
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Q2. 
Tiling Problem Statement
Given a board with 2 rows and N columns, and an infinite supply of 2x1 tiles, determine the number of distinct ways to completely cover the board using these tiles.
You can place...read more
Ans. Recursion And Memoization (Runtime error)
Try to place the tile to fill the unit column and calculate the number of ways from smaller sub-problems. Then use memoization to convert O(2^N) solution to an O(N) solution.
1. At any point we are at ‘idx’ column then we can place our tile in two ways to fill this column.
   1. Option 1 -  1 Horizontal Tile
We can place in this way where we have ‘idx-1’ column filled.
    &nb...read more
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Round duration - 60 Minutes
Round difficulty - Easy

Timing was 3pm to 4 pm
environment was easy familier and interviwer was also in good mood ,first he ask me about general things then he come on OS/DBMS .

Round duration - 30 Minutes
Round difficulty - Easy

timing - 10am to 10:30am
environment was very familier and interviewer was with good sence of humor

Q1. Microcontrollers, Protocols, Interfaces, etc.
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Q1. Digital circuits, micro processor interfaces, protocols, previous projects, etc.
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Q1. What are your strengths and weaknesses?
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Q2. Where do you see yourself in 5 years?
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Q3. Tell me about yourself.
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Q4. Why are you looking for a change?
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Q1. Basic C programs, OS concepts,
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Q2. Project Overview, DATASTRUCTURE
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