RadiSys SDE (Software Development Engineer) Interview Questions and Answers

To move the cursor 5 characters ahead of current position in an opened file.

• Use fseek() function to move the cursor to the desired position.

• Pass the current position and offset to fseek() function.

• Use SEEK_CUR as the reference point for the offset.

Answering which statement about a binary heap is false.

• A binary heap is a complete binary tree where the parent node is always greater or smaller than its children.

• A binary heap can be represented as an array.

• A binary heap can be used to implement priority queues.

• A binary heap can only be a max heap and not a min heap.

Virtual function is a function in base class that is overridden in derived class.

• Virtual function allows polymorphism in C++.

• It is declared in base class with virtual keyword.

• It is overridden in derived class with same signature.

• It is called based on the object type at runtime.

• Example: virtual void display() = 0; // pure virtual function

Mutex is a synchronization mechanism used to prevent multiple threads from accessing shared resources simultaneously.

• Mutex stands for mutual exclusion.

• It is used to protect critical sections of code where multiple threads may try to access shared resources.

• Mutex allows only one thread to access the shared resource at a time.

• If another thread tries to access the resource while it is locked by a mutex, it will be blocked...read more