Future Electronics Interview Questions and Answers

Q1. Merge intervals ( Leetcode)
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Q2. Buy and sell stocks II (Leetcode)
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Q3. Runtime polymorphism and how it works vptr and vtable
Ans. 
Runtime polymorphism in C++ is achieved through virtual functions, vptr (virtual pointer), and vtable (virtual table).
• Runtime polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Virtual functions are declared in a base class and overridden in derived classes to achieve polymorphism.

• vptr is a pointer that points to the vtable of an object, allowing dynamic binding of virtual ...read more
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Q4. Which version of c++ you use
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I primarily use C++17, but I am familiar with earlier versions as well.
• I am comfortable working with features introduced in C++17 such as structured bindings and constexpr if

• I have experience with earlier versions like C++11 and C++14

• I stay updated with the latest features and improvements in C++ standards
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Q5. Design patterns
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Q6. Have you used any windows api's?
Ans. 
Yes, I have used Windows API's extensively in my previous projects.
• I have used Windows API's for tasks such as creating windows, handling messages, and interacting with system resources.

• Examples include using functions like CreateWindow, SendMessage, and ReadFile.

• I have also worked with specific Windows API's like Winsock for networking and WinINet for internet-related tasks.
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Q1. One debugging question was given which will test knowledge on copy constructor, copy assignment, their return type move constructor, move assignment shallow copy, deep copy runtime polymorphism pointer ini...read more
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Q2. What is dynamic_cast where it can fail and what will happen in that case
Ans. 
dynamic_cast is a C++ operator used for safe downcasting of pointers and references in polymorphic classes.
• dynamic_cast is used to safely downcast a pointer or reference from a base class to a derived class.

• It can fail if the object being casted is not of the target type, in which case it returns a null pointer for pointers or throws a std::bad_cast exception for references.

• Dynamic_cast can only be used with pointers o...read more
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Q1. Same debugging question while making it advance how will you handle in case there is data member of pointer to int array in deep copy how will you ensure that it does delete previous data in case new opera...read more
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Q2. What is union in c++
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Union in C++ is a data structure that allows storing different data types in the same memory location.
• Unions are similar to structures but all members share the same memory location.

• Only one member of a union can be accessed at a time.

• Unions are useful when you need to store different data types in the same memory space.

• Example: union MyUnion { int i; float f; };

• Example: MyUnion u; u.i = 10; // Accessing integer member
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Q3. What is weak pointer
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Weak pointer is a type of smart pointer in C++ that does not control the lifetime of the object it points to.
• Weak pointers are used to break circular references in shared pointers.

• They do not increase the reference count of the object.

• They are used in scenarios where the object may be deleted while there are still weak pointers pointing to it.
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Q4. What are processes and threads memory is allocated to what process or threads? what is mutex and semaphore how many threads/process can you launch at a time what is meaning of core in 4-core system what is...read more
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Processes and threads are units of execution in a computer system. Memory is allocated to processes. Mutex and semaphore are synchronization mechanisms. Core refers to a processing unit in a multi-core system. Context switching is the process of switching between different processes or threads.
• Processes are independent units of execution with their own memory space and resources.

• Threads are lightweight units of executi...read more
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Q5. What is this pointer tell me situation where only this pointer can be used nothing else will work
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Aptitude questions and 2 coding questions

Q1. What is difference between list and tuple
Ans. 
List is mutable, tuple is immutable in Python.
• List is defined using square brackets [], tuple using parentheses ().

• Elements in list can be changed, added, or removed. Tuple elements are fixed.

• List is used for homogeneous data, tuple for heterogeneous data.

• Example: list_example = [1, 2, 3], tuple_example = (1, 'a', True)
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Q2. What is decorator
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A decorator is a design pattern in object-oriented programming that allows behavior to be added to individual objects, either statically or dynamically, without affecting the behavior of other objects.
• Decorators are used to modify the behavior of functions or methods.

• They are commonly used in Python to add functionality to existing functions or classes.

• Decorators are implemented using the @ symbol followed by the decor...read more
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Q3. What is get method
Ans. 
The get method is a function used to retrieve the value of a specified property from an object.
• Used in JavaScript to access the value of a property in an object

• Syntax: objectName.propertyName

• Example: var person = {name: 'John', age: 30}; console.log(person.name); // Output: John
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Q1. Telme about your family
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I come from a close-knit family of four, including my parents and younger sister.
• My parents have always been supportive of my education and career choices.

• I have a younger sister who is currently studying in college.

• We enjoy spending quality time together on weekends, whether it's going for a hike or watching movies at home.
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Q2. What's the most sequent sentence you used in the your life and success
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Q1. Ofdm, Fixed point, sampling theorem, digital filters,
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Q2. Previous work clarity
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Previous work clarity is essential for successful collaboration and understanding of project requirements.
• Clearly explain the projects you have worked on in the past, including your role and responsibilities

• Provide examples of how you communicated with team members to ensure clarity in project goals

• Discuss any challenges you faced in previous projects and how you overcame them
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Q1. Fft, ofdm, CP, sampling theorem, previous experience,
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Q2. C basics, memory layout, function pointer, big small endian, bit manipulation, zero padding in structures
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Bit manipulation, memory layout, interrupts, semaphore mutex, implement memcpy, sorting, algo to share resource equally

Q1. Previous work experience, general attitude
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