Sri Srinivasa Multispeciality Hospital Interview Questions and Answers

Insert a node to the middle of a linked list

• Find the middle node using slow and fast pointers

• Create a new node with the data to be inserted

• Adjust the pointers to insert the new node in the middle

Volatile and extern are keywords in C for memory management. Local and external linkages determine scope. SW and HW interrupts handle events. Different scheduling algorithms manage task priorities.

• Volatile keyword is used to indicate that a variable may be changed unexpectedly, typically by hardware. Example: volatile int x;

• Extern keyword is used to declare a variable that is defined in another file. Example: extern int y;

• Local linkage restricts the scope of a variable to the...read more

Addition and deletion operations in a linked list using C coding

• Use a struct to define the linked list node

• For addition, allocate memory for new node, update pointers accordingly

• For deletion, update pointers to skip the node to be deleted

Use two pointers to iterate through the list and remove duplicates by updating next pointers

• Initialize two pointers, current and next, to iterate through the list

• Compare current and next node values, if equal, update next pointer to skip duplicate node

• Repeat until end of list is reached

malloc is used to allocate memory without initializing it, while calloc is used to allocate memory and initialize it to zero.

• malloc allocates a block of memory of specified size, while calloc allocates a block of memory for an array of elements and initializes them to zero

• malloc does not initialize the allocated memory, while calloc initializes the allocated memory to zero

• malloc returns a pointer to the allocated memory block, while calloc returns a pointer to the allocated a...read more