SAP Software Developer Interview Questions, Process, and Tips

3 data structure questions. Simple to medium questions. String, Linked list based questions.

SQL questions. I was given some real-life examples of a system and was asked to design the SQL tables for it and normalize the tables.

Q1. Culture fit questions and basic background questions.
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Round duration - 30 minutes
Round difficulty - Easy

The round was an online assessment in which there were 2coding questions and the rest were the basic questions of c, c++ concept and surely it was an easy round and I would suggest you all kindly attempt those coding questions

Q1. 
Reverse Linked List Problem Statement
Given a singly linked list of integers, return the head of the reversed linked list.
Example:
Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
Reversed link...read more
Ans. 
Reverse a singly linked list of integers and return the head of the reversed linked list.
• Iterate through the linked list and reverse the pointers to point to the previous node.

• Keep track of the current, previous, and next nodes while reversing the linked list.

• Update the head of the reversed linked list as the last node encountered during reversal.
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Round duration - 30 minutes
Round difficulty - Medium

It was the complete coding round based upon the Resume.

Q1. 
Multilevel Inheritance Implementation
Create a series of classes to demonstrate multilevel inheritance.
Explanation:
Create three classes to illustrate multilevel inheritance.
• GrandFather: This clas...read more
Ans. 
Demonstrate multilevel inheritance with classes GrandFather, Father, and Son with specific attributes and methods.
• Create a class GrandFather with a parameterized constructor and attribute grandFatherName.

• Create a class Father inheriting from GrandFather with an additional attribute fatherName.

• Create a class Son inheriting from Father with an additional attribute sonName and a method printName to display all names in a ...read more
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Round duration - 30 minutes
Round difficulty - Easy

This was totally based upon you, they judge your confidence, Why SAP, What is SAP, and so on. Why are you choosing SAP WILP rather than doing a normal MCA or MTech degree? Remember they will going to tell you that it’s very hard and all but you have to stick over your words and should show up all your confidence.

Q1. Difference between REST and SOAP services?
Ans. 
REST is lightweight and uses HTTP for communication, while SOAP is XML-based and has a more complex messaging format.
• REST is simpler and easier to use than SOAP.

• SOAP is more secure and reliable than REST.

• REST uses HTTP methods like GET, POST, PUT, DELETE, while SOAP uses XML messaging format.

• REST is better suited for web applications, while SOAP is better suited for enterprise-level applications.

• Examples of RESTful ser...read more
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Q2. Use of 'finally' block in Java? When finally" block is not called in which cases?
Ans. 
The 'finally' block in Java is used to execute code after try-catch blocks, even if an exception is thrown.
• The 'finally' block is always executed, regardless of whether an exception is thrown or caught.

• It is used to release resources like database connections, network connections, etc.

• If the JVM exits while the try or catch code is being executed, then the 'finally' block may not execute.

• If the thread executing the try...read more
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Q3. Difference between StringBuilder and StringBuffer classes in Java?
Ans. 
StringBuilder is not thread-safe while StringBuffer is thread-safe.
• StringBuilder is faster than StringBuffer in single-threaded environments.

• StringBuffer is synchronized, making it safe to use in multi-threaded environments.

• Both classes are used to manipulate strings, but StringBuilder is preferred for single-threaded environments.

• Example: StringBuilder sb = new StringBuilder("Hello");

• Example: StringBuffer sb = new Str
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Q4. Difference between ArrayList and LinkedList? Their other implementations? pros and cons?
Ans. 
ArrayList and LinkedList are both implementations of List interface in Java. ArrayList is backed by an array while LinkedList is backed by a doubly linked list.
• ArrayList provides constant time access to elements while LinkedList provides constant time insertion and deletion at any position.

• ArrayList is better for random access and LinkedList is better for sequential access.

• Other implementations of List interface includ...read more
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Q1. Types of class loaders in Java?
Ans. 
Java has three types of class loaders: Bootstrap, Extension, and System.
• Bootstrap class loader loads core Java classes from rt.jar and other core libraries.

• Extension class loader loads classes from the extensions directory.

• System class loader loads classes from the classpath.

• Custom class loaders can also be created to load classes from non-standard locations.
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Q2. Which data structures the candidate is confident in development and why?
Ans. 
I am confident in developing arrays, linked lists, and hash tables.
• Arrays are simple and efficient for storing and accessing data.

• Linked lists are useful for dynamic data structures and efficient insertion/deletion.

• Hash tables provide fast access to data with key-value pairs.
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Q3. Why String" class is immutable in Java environment?
Ans. 
String class is immutable in Java to ensure security, thread-safety, and performance.
• Immutable objects are thread-safe as they cannot be modified by multiple threads simultaneously.

• Immutable objects are also secure as they cannot be modified by malicious code.

• String pool is possible because of immutability, which improves performance by reducing memory usage.

• StringBuffer and StringBuilder classes are used for mutable s
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Q4. How does Java hashmap" works?
Ans. 
Java hashmap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.
• Hashmap uses hashing to store and retrieve values based on their keys.

• It allows null values and only one null key.

• It implements the Map interface and provides methods like put(), get(), remove(), containsKey(), and size().

• The initial capacity and load factor can be specified while creating a hashmap.

• H...read more
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What is biggest number that can be formed using four 2s?

Q1. Reverse linked list
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Q2. Remove node in linked list
Ans. 
To remove a node in a linked list, update the previous node's next pointer to skip the node to be removed.
• Traverse the linked list to find the node to be removed

• Update the previous node's next pointer to skip the node to be removed

• Free the memory allocated to the node to be removed
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Core java question and deep discussion

Round duration - 60 minutes
Round difficulty - Medium

It consisted of 10 MCQ questions based on OOPs(C++ and Java-based), C(based on pointers), and 2 coding questions.

Q1. 
Longest Unique Substring Problem Statement
Given a string input of length 'n', your task is to determine the length of the longest substring that contains no repeating characters.
Explanation:
A substri...read more
Ans. 
Find the length of the longest substring with unique characters in a given string.
• Use a sliding window approach to keep track of the longest substring without repeating characters.

• Use a hashmap to store the index of each character in the string.

• Update the start index of the window when a repeating character is encountered.

• Calculate the maximum length of the window as you iterate through the string.
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Round duration - 30-40 minutes
Round difficulty - Medium

Q1. 
Duplicate Integer in Array
Given an array ARR of size N, containing each number between 1 and N-1 at least once, identify the single integer that appears twice.
Input:
The first line contains an integer...read more
Ans. 
Identify the duplicate integer in an array containing numbers between 1 and N-1.
• Iterate through the array and keep track of the frequency of each element using a hashmap.

• Return the element with a frequency greater than 1 as the duplicate integer.

• Time complexity can be optimized to O(N) using Floyd's Tortoise and Hare algorithm.

• Example: For input [1, 2, 3, 4, 4], the output should be 4.
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Round duration - 30 - 40 minutes
Round difficulty - Medium

Q1. 
Binary Pattern Problem Statement
Given an input integer N, your task is to print a binary pattern as follows:
Example:
Input:
N = 4
Output:
1111
000
11
0
Explanation:
The first line contains 'N' 1s. T...read more
Ans. 
Print a binary pattern based on input integer N in a specific format.
• Iterate from 1 to N and print N - i + 1 numbers alternatively as 1 or 0 in each line

• Follow the pattern of increasing 1s and decreasing 0s in each line

• Handle the number of test cases and constraints as specified
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Round duration - 15 minutes
Round difficulty - Easy

Q1. What is oops, data abstraction, inheritance, polymorphism. Some sql queries In depth discussion about project
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Q1. Given some situation amd how do you face it Given some problem.and how will you solve it Some puzzles Hobbies Relocatiob
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Q1. Where do you see yourself in 5 years?
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Q2. What are your strengths and weaknesses?
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Q3. Tell me about yourself.
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