Centre for Development of Advanced Computing Embedded Software Engineer Interview Questions and Answers

Mutex is used for exclusive access to a resource by a single thread, while semaphore is used for controlling access to a resource by multiple threads.

• Mutex is binary in nature, allowing only one thread to access the resource at a time.

• Semaphore can have a count greater than 1, allowing multiple threads to access the resource simultaneously.

• Mutex is typically used for protecting critical sections of code.

• Semaphore is of...read more

When volatile and const are used together, the variable is treated as read-only and its value can change unexpectedly.

• The const keyword indicates that the variable's value cannot be changed by the program.

• The volatile keyword tells the compiler that the variable's value may change at any time, even if it doesn't appear to be modified by the program.

• When used together, the variable is treated as read-only by the program...read more

Brute force can be both good and bad depending on the context and application.

• Brute force can be effective for small scale problems or when time is limited.

• However, it is inefficient and impractical for large scale problems.

• Brute force may also be necessary in certain scenarios where no other efficient solution exists.

• For example, brute force can be used in password cracking when other methods fail.

Mutex is used for exclusive access to a resource by a single thread, while semaphore is used for controlling access to a resource by multiple threads.

• Mutex is binary in nature, allowing only one thread to access the resource at a time.

• Semaphore can have a count greater than 1, allowing multiple threads to access the resource simultaneously.

• Mutex is used for protecting critical sections of code, while semaphore is used ...read more

When volatile and const are used together, the variable is treated as read-only and its value can change unexpectedly.

• Using volatile and const together is rare but can be useful for memory-mapped hardware registers.

• The volatile keyword tells the compiler that the variable can be changed unexpectedly, while const ensures the variable is read-only.

• Example: const volatile int * const ptr = (int *)0x1234; // pointer to a r...read more