CommScope interview question

1) Difference between malloc (vs) new? 2) Difference between thread and process? 3) Write a program to create a process and thread using fork function? 4) What is the use of fork()? 5) How do you transmit a signal from one place to another? 6) What is dangling pointer? 7) Difference between C and C++ ? 8) Define inheritance with example? 9) Full form of SQL? 10) What is Operating System?