LG Soft India Interview Questions and Answers for Freshers

Macros are preprocessor directives that are replaced before compilation, while functions are blocks of code that are executed at runtime.

• Macros are defined using #define directive, while functions are defined using function keyword.

• Macros are expanded by the preprocessor before compilation, while functions are executed at runtime.

• Macros can be used for simple text replacement, while functions can perform complex operations.

• Macros do not have type checking, while functions hav...read more

exec replaces the current process with a new one, while fork creates a new process.

• exec replaces the current process with a new one, while fork creates a new process

• exec system call loads a new program into the current process's memory space and starts its execution

• fork system call creates a new process by duplicating the existing process

Implement list creation in data structures and algorithms

• Use an array to store the elements of the list

• Implement functions to add, remove, and access elements in the list

• Consider using a linked list for more efficient insertion and deletion operations

Storage classes in C are auto, register, static, and extern. They control the scope and lifetime of variables.

• Auto - default storage class for local variables, stored in stack memory

• Register - stored in CPU registers for faster access

• Static - retains its value between function calls, stored in data segment

• Extern - used to access global variables across multiple files

Storage classes in C define the scope and lifetime of variables.

• There are four storage classes in C: auto, register, static, and extern.

• Auto variables are local to the block they are declared in and are automatically destroyed when the block exits.

• Register variables are stored in CPU registers for faster access.

• Static variables retain their value between function calls.

• Extern variables are declared outside of any function and can be accessed by multiple files.