30+ PTC Interview Questions and Answers

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

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

A, B cross first (2 mins), A returns (1 min), C, D cross (10 mins), B returns (2 mins), A, B cross again (2 mins)

• A, B cross first (2 mins)

• A returns (1 min)

• C, D cross (10 mins)

• B returns (2 mins)

• A, B cross again (2 mins)

Cut the cake in half horizontally, then stack the halves and cut vertically twice.

• Cut the cake horizontally to get 2 equal halves.

• Stack the halves on top of each other and cut vertically to get 4 equal quarters.

• Finally, stack the quarters and cut vertically again to get 8 equal parts.

They will meet again after the starting point at a distance of LCM(x, y).

• The distance at which they will meet again is the least common multiple (LCM) of their speeds.

• For example, if A is running at a speed of 4 m/s and B is running at a speed of 6 m/s, they will meet again after 12 meters.

• Another example, if A is running at a speed of 3 km/hr and B is running at a speed of 5 km/hr, they will meet again after 15 km.

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 wire crafted into a circle will have the minimum area.

• The circle has the smallest perimeter to area ratio compared to the equilateral triangle and square.

• The formula for the area of a circle is A = πr^2, where r is the radius.

• For the equilateral triangle, the formula is A = (√3/4) * s^2, where s is the side length.

• For the square, the formula is A = s^2, where s is the side length.

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

I will buy a particular vehicle by considering my budget, researching different models, test driving them, and negotiating the price.

• Determine my budget for the vehicle

• Research different vehicle models that meet my requirements

• Test drive the shortlisted vehicles to assess their performance and comfort

• Compare prices from different sellers and negotiate for the best deal

Swapping two numbers using different techniques and discussing possible test cases and errors.

• Using a temporary variable to swap the numbers

• Using arithmetic operations to swap the numbers

• Using bitwise XOR operation to swap the numbers

• Test cases: positive numbers, negative numbers, zero, large numbers, floating point numbers

• Possible errors: not using a temporary variable correctly, overflow/underflow with arithmetic operations, not handling edge cases

I have a strong understanding of PTC core values.

• PTC core values include customer success, innovation, integrity, and teamwork.

• I have demonstrated my understanding of these values through my work on projects that prioritize customer satisfaction and collaboration.

• I have also shown my commitment to integrity by always following ethical guidelines in my work.

• I stay updated on industry trends and technologies to contribute to innovation within the company.

If changes are not impact assessed properly, a Change Manager should take corrective actions to ensure proper assessment and minimize risks.

• Identify the root cause of the issue

• Communicate with stakeholders to understand the impact of the change

• Reassess the change and update the impact assessment

• Implement necessary changes to minimize risks

• Ensure proper documentation and reporting

• Conduct a post-implementation review to identify areas of improvement

Test all possible input combinations and edge cases to find bugs in the addition program.

• Test with positive and negative numbers

• Test with decimal numbers

• Test with large numbers

• Test with zero

• Test with one number being zero

• Test with non-numeric inputs

• Test with overflow or underflow

• Test with different data types

• Test with different operating systems and browsers

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 implementation in 'Circle' or 'Rectangle' based on the actual object ty...read more

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.

A program to determine if a given number is prime or not.

• Check if the number is less than 2, if so it is not prime

• Iterate from 2 to the square root of the number and check for divisibility

• If the number is divisible by any number other than 1 and itself, it is not prime

• If no divisors are found, the number is prime

To create a schema, use CREATE SCHEMA statement. Data types include VARCHAR2, NUMBER, DATE, etc.

• Create a schema using CREATE SCHEMA statement

• Specify data types for columns when creating tables

• Common data types include VARCHAR2, NUMBER, DATE, etc.

• Use appropriate data types based on the type of data being stored

Function to find factorial of a number

• Create a function that takes a number as input

• Use a loop to multiply the number by decreasing integers until reaching 1

• Return the final result as the factorial of the input number

Oops Concepts are fundamental principles of object-oriented programming that help in organizing and designing code.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features to the outside world.

Correct mislabelled jars by relabelling them with correct labels.

• Identify the mislabelled jars

• Check the correct labels for each jar

• Remove the mislabelled label

• Apply the correct label to the jar

• Ensure all jars are correctly labelled

RMAN backups can be performed using commands like BACKUP DATABASE, BACKUP ARCHIVELOG, BACKUP CONTROLFILE, etc.

• BACKUP DATABASE: used to backup the entire database

• BACKUP ARCHIVELOG: used to backup archived redo logs

• BACKUP CONTROLFILE: used to backup the control file

• BACKUP TABLESPACE: used to backup specific tablespaces

• BACKUP AS COPY: used to create a physical copy of data files during backup

I have worked on a variety of technologies including XML, HTML, CSS, JavaScript, and API documentation.

• XML

• HTML

• CSS

• JavaScript

• API documentation

A program to generate Fibonacci series using iterative or recursive approach.

• Iterative approach: Use a loop to generate Fibonacci numbers by adding the previous two numbers.

• Recursive approach: Define a function that calls itself to generate Fibonacci numbers.

• Example: Fibonacci series up to 10 - 0, 1, 1, 2, 3, 5, 8, 13, 21, 34

Reverse a number using recursion.

• Define a recursive function that takes the number as input

• Base case: if the number is less than 10, return the number

• Recursive case: return the last digit of the number concatenated with the result of calling the function with the number divided by 10

• Call the function with the input number

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'

CSRF is a type of attack where unauthorized commands are transmitted from a user that the web application trusts. SSRF is a type of attack where an attacker can send a crafted request from a vulnerable web application.

• CSRF stands for Cross-Site Request Forgery, while SSRF stands for Server-Side Request Forgery.

• CSRF involves tricking a user into making a request they did not intend to, while SSRF involves an attacker sending a crafted request from a vulnerable web application....read more

A framework is a set of guidelines or rules that provide structure and support for developing software applications.

• Frameworks help in organizing code and promoting best practices

• They provide reusable components and modules to speed up development

• Frameworks can be front-end (like React or Angular) or back-end (like Spring or Django)

Constrain is a tool used in AutoCAD/SolidWorks to restrict the movement of objects.

• Constraining objects ensures that they maintain a specific position or relationship to other objects

• Examples of constraints include horizontal, vertical, tangent, and concentric constraints

• Constraints can be added manually or automatically using the software's constraint tools

End to end application architecture refers to the overall structure and design of an application from the front-end user interface to the back-end server infrastructure.

• Front-end: Includes user interface design, user experience, and client-side technologies like HTML, CSS, and JavaScript.

• Back-end: Involves server-side technologies, databases, and application logic.

• Middleware: Connects the front-end and back-end components, handling communication and data processing.

• Infrastruc...read more

Basic tools of SolidWorks include sketching, modeling, assembly, and drawing tools.

• Sketching tools: used to create 2D sketches that can be extruded or revolved to create 3D models

• Modeling tools: used to create 3D models by extruding, revolving, sweeping, lofting, and more

• Assembly tools: used to assemble multiple parts into a single model

• Drawing tools: used to create 2D drawings of 3D models for manufacturing or documentation purposes

Interface is a point where two systems, subjects, organizations, etc. meet and interact with each other.

• Interface is a boundary or point of interaction between two entities.

• It allows for communication, data transfer, or interaction between the entities.

• Examples include user interfaces on electronic devices, software interfaces, and physical interfaces like USB ports.

Queryparam is used to pass parameters in the URL query string, while pathparam is used to pass parameters in the URL path.

• Queryparam is appended to the end of the URL after a '?' symbol, while pathparam is included in the URL path itself.

• Queryparam is optional and can be used for filtering or sorting data, while pathparam is required for identifying a specific resource.

• Example of queryparam: /api/users?name=John&age=30

• Example of pathparam: /api/users/123

Reverse a linked list

• Iterate through the linked list and reverse the pointers

• Use three pointers to keep track of current, previous, and next nodes

• Update the next pointer of each node to point to the previous node

Implement stack using array in C++

• Create a class with an array to store elements

• Implement push() and pop() functions to add and remove elements

• Include functions like isEmpty() and isFull() to check stack status

A program for HashMap implementation in Java

• HashMap is a data structure that stores key-value pairs

• Use put() method to add key-value pairs to HashMap

• Use get() method to retrieve values based on keys

• HashMap allows null keys and values

• Example: HashMap<String, Integer> map = new HashMap<>()

Singleton is a design pattern that restricts the instantiation of a class to a single object.

• Use a private static member variable to hold the single instance of the class.

• Make the constructor private to prevent direct instantiation of the class.

• Provide a static method that returns the single instance of the class.

• Ensure thread safety if the singleton needs to be accessed concurrently.

Reverse a string by iterating through each character and appending to a new string.

• Iterate through each character of the input string

• Append each character to a new string in reverse order

• Return the reversed string