Codoid Interview Questions and Answers

Memory leaks can be found and fixed using various tools and techniques.

• Use memory profiling tools like Valgrind, LeakSanitizer, or AddressSanitizer to detect memory leaks.

• Analyze the code to identify the root cause of the memory leak and fix it.

• Ensure that all allocated memory is properly deallocated and avoid unnecessary memory allocations.

• Use smart pointers and garbage collection techniques to manage memory automatically.

• Regularly monitor and test the application to prevent...read more

Circular buffer program with producer and consumer scenario, detecting overflow and stopping producer.

• Implement a circular buffer with a fixed size and two pointers for producer and consumer

• Use semaphores to synchronize access to the buffer

• When the buffer is full, stop the producer until the consumer reads from the buffer

• When the buffer is empty, stop the consumer until the producer writes to the buffer

• Use mutex locks to prevent race conditions

• Implement error handling for ove...read more

Expression to clear nth bit in a number

• Use bitwise AND operator with the complement of 2 raised to the nth power

• Example: To clear 3rd bit of 1010, use 1010 & ~(1<<3) = 1000

Program to delete a node in a singly linked list

• Find the node to be deleted and its previous node

• Update the previous node's next pointer to skip the node to be deleted

• Free the memory occupied by the node to be deleted

System call is a request made by a program to the operating system for performing a specific task.

• System call provides an interface between the user program and the operating system.

• It allows user programs to request services from the operating system.

• Examples of system calls include read, write, open, close, fork, exec, etc.

• System call is initiated by a software interrupt or trap instruction.

• The operating system performs the requested task and returns the result to the user ...read more