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PTC Software Developer Interview Questions and Answers
7 Interview questions
No, multiple inheritance is not allowed in Java.
Java does not support multiple inheritance for classes to avoid the diamond problem.
However, multiple inheritance is allowed for interfaces in Java.
Example: class A extends B, C is not allowed, but interface A extends B, C is allowed.
Polymorphism in software development is like a person driving different vehicles using the same driving skills.
Polymorphism allows objects of different classes to be treated as objects of a common superclass.
For example, a superclass 'Shape' can have subclasses like 'Circle' and 'Rectangle' which can be treated as 'Shape' objects.
Calling a method like 'draw()' on a 'Shape' object will execute the specific implemen...
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
Allows a class to inherit attributes and methods from another class
Promotes code reusability and reduces redundancy
Creates a parent-child relationship between classes
Example: Class 'Car' can inherit properties and methods from class 'Vehicle'
Code to calculate number of bounces a ball goes through until it comes to rest.
Use a loop to simulate the bounces until the ball stops bouncing
Calculate the height of each bounce using the given formula
Keep track of the number of bounces in a counter variable
What people are saying about PTC
Code to print * in five consecutive lines
Use a loop to iterate five times
Inside the loop, print a string containing a single * character
The best and less time consuming way to calculate factorial of a number is using iterative approach.
Iteratively multiply the number with all the numbers from 1 to the given number
Start with a result variable initialized to 1
Multiply the result with each number in the range
Return the final result
PTC HR Interview Questions
Code to find factorial using function recursion
Define a function that takes an integer as input
Check if the input is 0 or 1, return 1 in that case
Otherwise, call the function recursively with input-1 and multiply it with the input
PTC Software Developer Interview Experiences
4 interviews found
Anonymous
Selected
I appeared for an interview before Apr 2024, where I was asked the following questions.
- Q1. DSA related basics
- Q2. SQL and Oops concepts
Interview Preparation Tips
I applied via Campus Placement and was interviewed in Dec 2022. There were 3 interview rounds.
First 20 question for apti and then coding round of 20 questions each from c/c++ , java and SQL
(5 Questions)
- Q1. OOPS questions Data structure like linked list Binary search SQL
- Q2. Is multiple inheritance allowed in java?
- Ans.
No, multiple inheritance is not allowed in Java.
Java does not support multiple inheritance for classes to avoid the diamond problem.
However, multiple inheritance is allowed for interfaces in Java.
Example: class A extends B, C is not allowed, but interface A extends B, C is allowed.
- Q3. What is inheritance
- Ans.
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
Allows a class to inherit attributes and methods from another class
Promotes code reusability and reduces redundancy
Creates a parent-child relationship between classes
Example: Class 'Car' can inherit properties and methods from class 'Vehicle'
- Q4. What is real time example of polymorphism
- Q5. What is your project based on?
Interview Preparation Tips
Skills evaluated in this interview
Selected
I applied via Referral and was interviewed before Sep 2022. There were 4 interview rounds.
Aptitude Java CI/CD DevOps Unit testing HTML CSS
(1 Question)
- Q1. Technical questions same as above Puzzles to assess problem solving abilities
(1 Question)
- Q1. General questions around CTC and expectations
Snehal Jaipurker
I appeared for an interview in Jul 2017.
Interview Questionnaire
6 Questions
- Q1. Code to print * in five consecutive lines
- Ans.
Code to print * in five consecutive lines
Use a loop to iterate five times
Inside the loop, print a string containing a single * character
- Q2. A ball is left from a height of 10 meters. After bouncing first time it looses 10% of its previous height the next time it bounces. Write a code to calculate the number of bounces the ball goes through unt...
- Q3. Which is the best and less time consuming way to calculate factorial of a number?
- Q4. Write the code to find factorial using function recursion.
- Q5. They asked for my introduction.
- Q6. They asked about my family members.
Interview Preparation Tips
Experience: Aptitude test was moderately tough. The coding test was on basics of c language of all the topics.
Tips: Solving R. S. Agrawal for Aptitude and videos on YouTube on C language are sufficient to score well.
Duration: 1 hour
Total Questions: 60
Round: Technical Interview
Experience: I wrote the first code correctly. I wrote the second code 75% correct and they explained me my mistakes and I could understand where I was going wrong then I corrected my code and then they were satisfied. They asked me whether I could write the factorial code by function recursion method. I replied that I can write the factorial code but not by function recursion method. They were satisfied.
Tips: Build your coding skills by more practice.
Round: HR Interview
Experience: In this round they just asked me my introduction and said that you are shortlisted for now but we will give you final confirmation after a week.
Tips: Don't lie. Be genuine.
College Name: SCOE, PUNE
Skills evaluated in this interview
Interview questions from similar companies
I appeared for an interview in Aug 2016.
Interview Preparation Tips
Experience: The questions were tricky. We were given a paragraph and after reading it, a statement was given to us and we were asked to say if it is true, false or cannot say. The structure of the statement put us into a a tough place. So practice of such kind of questions is necessary.
For data interpretation questions a good hand on basic statistical mathematics is needed. One has to be quick because of the time crunch. The questions were approachable
Round: Technical Interview
Experience: In this round my resume was scanned and I was required to speak about myself, my projects and explain certain areas of my resume. The interviewer picked up one of my basic project, surprisingly, and asked me to elaborate on it. He asked me how I can improve the project. And I had to write a code to make that change. Basically, one should have a good idea about the projects they've done/ mentioned in their resume. And know it in detail.
Few questions on data structures. Prepare well for coding type questions and data structures.
Round: Puzzle Interview
Experience: The interviewer asked me two puzzles. They were moderate level. And also luckily he was helpful whenever I got stuck.
Round: HR Interview
Experience: HR round was good. Basic questions like " tell me more about yourself", brief information about my past history, college life, extra curricular activities. In the end she asked me, "should we hire you?" And I lightly answered " why not!" So it was a good interview overall.
Skills: Coding Skills, Team Working Ability, Project management
College Name: Visvesvaraya National Institute Of Technology
Interview Preparation Tips
Skill Tips: Try to be very good at this subject if you are targeting this company. Challenging algorithm questions were also asked but they were not too hard. A fine knowledge of Java could give you an edge over other candidates.
Skills: VmWare mainly focuses on Operating System.
College Name: NIT SURATHKAL
I appeared for an interview before Mar 2021.
(2 Questions)
Round duration - 45 minutes
Round difficulty - Medium
Technical Interview round with questions on DSA.
- Q1.
Reverse Words in a String: Problem Statement
You are given a string of length
N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o... - Q2.
Reverse a Stack Using Recursion
You are given a stack of integers. Your task is to reverse the stack using recursion without using any extra space other than the internal stack space used due to recursion...
- Ans.
Reverse a stack using recursion without using any extra space other than the internal stack space.
Use recursion to pop all elements from the original stack and store them in function call stack.
Once the stack is empty, push the elements back in reverse order.
Base case of recursion should be when the original stack is empty.
(2 Questions)
Round duration - 45 minutes
Round difficulty - Medium
Technical Interview round with questions on DSA.
- Q1.
Convert a Binary Tree to its Mirror Tree
Given a binary tree, convert this binary tree into its mirror tree. A binary tree is a tree in which each parent node has at most two children. The mirror of a bin...
- Ans.
Convert a binary tree to its mirror tree by interchanging left and right children of all non-leaf nodes.
Traverse the binary tree in a recursive manner.
Swap the left and right children of each non-leaf node.
Continue this process until all nodes have been processed.
- Q2.
Remove Nth Node from End of Linked List
You are given a singly linked list with 'N' nodes, each containing integer data, and an integer 'K'. Your goal is to remove the 'K'th node counting from the end of ...
- Ans.
Remove the Kth node from the end of a singly linked list.
Use two pointers approach to find the Kth node from the end.
Handle edge cases like removing the head node or removing the last node.
Update the pointers to remove the Kth node and reconnect the list.
Round duration - 30 minutes
Round difficulty - Easy
Typical Managerial round.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
Interview Preparation Tips
College Name: NIT SURATHKAL
I appeared for an interview before Mar 2021.
(4 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Technical Interview round with questions based on DSA, OOPS and puzzles.
- Q1.
Reverse Linked List Problem Statement
Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.
Input:
The first line of input is an intege... - Q2.
Reverse Number Problem Statement
Ninja is exploring new challenges and desires to reverse a given number. Your task is to assist Ninja in reversing the number provided.
Note:
If a number has trailing ze...
- Q3.
Reverse the String Problem Statement
You are given a string
STRwhich contains alphabets, numbers, and special characters. Your task is to reverse the string.Example:
Input:
STR = "abcde"
Output:
"e...
- Q4. What is overloading in the context of Object-Oriented Programming (OOP)?
- Ans.
Overloading in OOP is the ability to define multiple methods with the same name but different parameters.
Overloading allows multiple methods with the same name but different parameters to coexist in a class.
The compiler determines which method to call based on the number and type of arguments passed.
Example: having multiple constructors in a class with different parameter lists.
(6 Questions)
Round duration - 60 minutes
Round difficulty - Medium
Technical round with question based on Web Dev, Cloud Computing, Networking etc.
- Q1. What is TELNET?
- Ans.
TELNET is a network protocol used to establish a connection with a remote computer over a network.
TELNET stands for Telecommunication Network.
It allows a user to log in to a remote computer and execute commands as if they were directly connected to that computer.
TELNET operates on port 23.
It is not secure as the data is transmitted in plain text.
SSH (Secure Shell) is a more secure alternative to TELNET.
- Q2. What is the difference between TELNET and SSH?
- Ans.
TELNET is insecure, while SSH is secure for remote access to servers.
TELNET sends data in plain text, while SSH encrypts data for secure communication
SSH uses public-key cryptography for authentication, TELNET does not
SSH provides secure remote access to servers, TELNET does not prioritize security
TELNET operates on port 23, while SSH operates on port 22
- Q3.
Problem: Sort an Array of 0s, 1s, and 2s
Given an array/list
ARRconsisting of integers where each element is either 0, 1, or 2, your task is to sort this array in increasing order.Input:
The input sta...
- Ans.
Sort an array of 0s, 1s, and 2s in increasing order.
Use a three-pointer approach to partition the array into sections of 0s, 1s, and 2s.
Iterate through the array and swap elements based on their values.
Time complexity should be O(n) to meet the constraints.
- Q4. What is a hypervisor?
- Q5. Can you explain cloud computing in layman’s terms?
- Ans.
Cloud computing is like renting a computer over the internet instead of owning one.
Cloud computing allows users to access and store data and applications over the internet instead of on their own physical computer.
It offers scalability, flexibility, and cost-effectiveness as users can easily adjust their storage and computing needs.
Examples include services like Amazon Web Services (AWS), Microsoft Azure, and Google Cl...
- Q6. What are the stages in the Software Development Life Cycle?
- Ans.
The stages in the Software Development Life Cycle include planning, design, development, testing, deployment, and maintenance.
1. Planning: Define project scope, requirements, and timelines.
2. Design: Create architecture, UI/UX, and database design.
3. Development: Write code based on design specifications.
4. Testing: Verify functionality, performance, and security.
5. Deployment: Release the software to users or clients.
...
(3 Questions)
Round duration - 60 minutes
Round difficulty - Medium
Technical Interview round with questions based on DSA and OOPS. A detailed discussion on my projects was also carried out.
- Q1.
Common Elements in Three Sorted Arrays
Given three sorted arrays
A,B, andCof lengthsN,M, andKrespectively, your task is to find all elements that are present in all three arrays.Input:
The first... - Ans.
Find common elements in three sorted arrays and output them in order.
Iterate through all three arrays simultaneously using three pointers.
Compare elements at pointers and move pointers accordingly.
If elements are equal, add to result and move all pointers forward.
If elements are not equal, move pointer of smallest element forward.
- Q2. What is a volatile variable?
- Ans.
A volatile variable is a variable that can be modified by multiple threads simultaneously.
Volatile variables are used in multithreading to ensure visibility of changes made by one thread to other threads.
They are not cached in thread's local memory, but always read from main memory.
They are typically used for flags or status variables that are accessed by multiple threads.
Example: 'volatile boolean flag = true;'
- Q3. Can you explain the concept of multithreading in Java?
- Ans.
Multithreading in Java allows multiple threads to execute concurrently, improving performance and responsiveness.
Multithreading allows multiple threads to run concurrently within a single process.
Threads share the same memory space, allowing for efficient communication and data sharing.
Java provides built-in support for multithreading through the Thread class and Runnable interface.
Example: Creating a new thread using ...
Round duration - 30 minutes
Round difficulty - Easy
HR round with typical behavioral problems.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
I appeared for an interview before Mar 2021.
(2 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Need to write working code on a shared document so that the interviewer can see if you can put your ideas into code. In this round, they are not bothered about time complexity of your algorithm. They just wanted to know if you can code whatever you think. So if you do not find best solution also it is OK but write the code for average case at-least.
- Q1.
Problem: Search In Rotated Sorted Array
Given a sorted array that has been rotated clockwise by an unknown amount, you need to answer
Qqueries. Each query is represented by an integerQ[i], and you must ... - Q2.
Pair Sum in Binary Search Tree
Given a Binary Search Tree (BST) and a target value 'K', determine if there exist two unique elements in the BST such that their sum equals the target 'K'.
Explanation:
A ...
- Ans.
Check if there exist two unique elements in a BST that sum up to a target value 'K'.
Traverse the BST in-order to get a sorted array of elements.
Use two pointers approach to find the pair sum in the sorted array.
Consider edge cases like duplicate elements or negative values.
Time complexity can be optimized to O(n) using a HashSet to store visited nodes.
(5 Questions)
Round duration - 60 minutes
Round difficulty - Medium
I was interviewed for vcloud team so they asked me questions on Cloud, DSA etc.
- Q1.
Reverse List In K Groups Problem Statement
You are provided with a linked list having 'N' nodes and an integer 'K'. Your task is to reverse the linked list in groups of size K. If the list is numbered fro...
- Ans.
Reverse a linked list in groups of size K
Iterate through the linked list in groups of size K
Reverse each group of nodes
Handle cases where the last group may have fewer than K nodes
- Q2.
Reverse Stack with Recursion
Reverse a given stack of integers using recursion. You must accomplish this without utilizing extra space beyond the internal stack space used by recursion. Additionally, you ...
- Q3. What is cloud computing?
- Q4. What are the benefits of cloud computing?
- Q5. What are the challenges of cloud computing?
- Ans.
Challenges of cloud computing include security concerns, data privacy issues, and potential downtime.
Security concerns: Data breaches and unauthorized access are major risks in cloud computing.
Data privacy issues: Ensuring compliance with regulations like GDPR can be challenging when data is stored in the cloud.
Potential downtime: Dependence on internet connectivity and cloud service providers can lead to downtime affe...
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
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Overall Interview Experience Rating
based on 3 interview experiences
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based on 10 reviews
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