Skillit Interview Questions and Answers

Class object is an instance of a class, inheritance allows a class to inherit properties and methods from another class, function overloading is defining multiple functions with the same name but different parameters, function overriding is redefining a function in a subclass, encapsulation is bundling data and methods that operate on the data into a single unit, abstraction is hiding the implementation details and showing only the necessary details, volatile keyword is used ...read more

Semaphores and mutex are synchronization mechanisms in multithreading. Threads are lightweight processes, while processes are independent execution units.

• Semaphore: used to control access to a shared resource by multiple threads. Example: controlling access to a printer in a networked system.

• Mutex: similar to a semaphore but only allows one thread to access a resource at a time. Example: protecting a critical section of code.

• Binary semaphore: a semaphore with only two states,...read more

I am comfortable with C, C++, and Python for embedded software development.

• Proficient in C for low-level programming

• Experienced in C++ for object-oriented design

• Skilled in Python for scripting and automation tasks

A pointer is a variable that stores the memory address of another variable.

• Types of pointers include null pointers, void pointers, function pointers, and array pointers.

• Example: int *ptr; // pointer to an integer variable

• Example: char *str = 'hello'; // pointer to a character array

Java program to reverse a string

• Use StringBuilder class to reverse the string

• Convert the string to StringBuilder object

• Use reverse() method of StringBuilder class to reverse the string

• Convert the StringBuilder object back to string