Continental Device India Embedded Software Developer Interview Questions and Answers

Virtual round for fundamental coding.

Physical round for coding assignment given on a paper.

Q1. How does twisted cable work? How to see CAN voltage levels on Oscilloscope?
Ans. 
Twisted cables reduce electromagnetic interference and CAN voltage levels can be observed using an oscilloscope.
• Twisted cables consist of pairs of wires twisted together to cancel out electromagnetic interference.

• The twisting helps maintain a consistent impedance, reducing signal degradation over distance.

• To see CAN voltage levels, connect the oscilloscope probes to the CAN High and CAN Low lines.

• Set the oscilloscope t...read more
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Q2. Swap the bits in a byte.
Ans. 
Swapping bits in a byte involves exchanging the positions of bits within an 8-bit binary number.
• A byte consists of 8 bits, indexed from 0 to 7.

• To swap bits, you can exchange pairs: (0, 7), (1, 6), (2, 5), (3, 4).

• Example: For byte 10110010, swapping gives 01011001.

• Use bitwise operations: AND, OR, and XOR to manipulate bits efficiently.

• In programming, you can use masks to isolate and swap bits.
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Q3. Why you want to join the company?
Ans. 
I am excited to join the company for its innovative projects, collaborative culture, and opportunities for professional growth.
• The company's commitment to cutting-edge technology aligns with my passion for innovation, as seen in my previous work on AI-driven applications.

• I admire the collaborative culture here, which fosters teamwork and knowledge sharing, similar to my experience in agile development teams.

• The opportu...read more
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Q4. How soon you can join the company?
Ans. 
I can join the company in two weeks, allowing time for a smooth transition from my current role.
• I need to provide my current employer with a two-week notice period.

• This timeframe ensures I can wrap up ongoing projects and hand over responsibilities.

• If needed, I can negotiate a quicker start date if my current employer agrees.
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Q1. What is oops concept example with each one
Ans. 
Object-oriented programming concepts include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: bundling data and methods that operate on the data into a single unit (class). Example: class Car with properties like make, model, and methods like start(), stop().

• Inheritance: creating new classes based on existing classes, inheriting their attributes and methods. Example: class SUV inheriting from cl...read more
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Q2. What is data structures and types with examples of all types
Ans. 
Data structures are ways of organizing and storing data in a computer so that it can be accessed and used efficiently.
• Types of data structures include arrays, linked lists, stacks, queues, trees, graphs, and hash tables.

• Arrays are a collection of elements stored in contiguous memory locations, accessed using an index.

• Linked lists are a series of nodes where each node contains data and a reference to the next node.

• Stack...read more
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Q3. What is class and objects with example and code
Ans. 
A class is a blueprint for creating objects in object-oriented programming. Objects are instances of classes.
• A class defines the properties and behaviors of objects. For example, a 'Car' class may have properties like 'color' and 'model', and behaviors like 'drive' and 'stop'.

• An object is an instance of a class. For example, 'myCar' can be an object of the 'Car' class with specific values for 'color' and 'model'.

• Code e...read more
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Q4. What is virutal function and staic functions
Ans. 
Virtual functions are functions in a base class that are overridden in derived classes, while static functions belong to the class itself rather than instances.
• Virtual functions allow for dynamic binding and polymorphism in object-oriented programming.

• Static functions are associated with the class itself and can be called without creating an instance of the class.

• Example: virtual void display() = 0; // pure virtual fun...read more
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Q5. What is project u did in present company
Ans. 
Developed a web-based project management tool for tracking tasks and deadlines.
• Used AngularJS for front-end development

• Implemented RESTful APIs for communication between front-end and back-end

• Utilized MySQL database for storing project data
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Write a function over loading and friend class with example?

Q1. Reverse a string
Ans. 
Reverse a given string
• Use a loop to iterate through the characters of the string

• Append each character to a new string in reverse order

• Return the reversed string
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Q2. Basic programming questions
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Round duration - 45 minutes
Round difficulty - Medium

Its a zoom call interview which lasted for 45 minutes. initially there are two panel members in which one is very targetting at me. They asked me different type of questions like jumping from DSA to project then to python then again java. Its a mixed combo pack type interview. for each and every question they asked me the real time example. The discussion on my project lasted for 15-20 mins.

Q1. 
Count Set Bits Problem Statement
Given a positive integer N, compute the total number of '1's in the binary representation of all numbers from 1 to N. Return this count modulo 1e9+7 because the result can...read more
Ans. 
Count the total number of set bits in the binary representation of numbers from 1 to N modulo 1e9+7.
• Use bitwise operations to count the set bits in each number from 1 to N.

• Keep track of the total set bits and return the result modulo 1e9+7.

• Optimize the solution to handle large values of N efficiently.

• Consider using dynamic programming or precomputing values for faster computation.
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Round duration - 30 mins
Round difficulty - Easy

This round was a zoom interview. The interview started with my brief introduction. This time the interview was more interested in my hobbies and passions. He asked me what do you do to keep yourself updated with the latest technology trends?

Q1. 5-10 Questions on Javascript concepts
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Q2. 2-3 medium level array coding questions
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Q3. 2 logical questions
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Q1. Friendly Communication
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Q1. One Leetcode medium level coding question
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Q2. Questions from your skills and the projects you have done so far
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