What is disadvantage of pointer in C?

Q Explain what does central processing unit (cpu) of plc consists?
Q Discuss the emerging ownership pattern with respect to cross-media ownership.
Q type def struct node { int NODEPTR * NODE }
Q What city was known as Christiana until 1925
Q void main() { unsigned i=1; /* unsigned char k= -1 => k=255; */ signed j=-1; /* char k= -1 => k=65535 */ /* unsigned or signed int k= -1 =>k=65535 */ if(ij) printf("greater"); else if(i==j) printf("equal"); }
Q Is there a best practice for port-channel load balancing between nexus 1000v series and nexus 7000 series switches?
Q What is Shuffling and Sorting in MapReduce?
Q Autosys job roles and responsibilities? Autosys job duties?
Q Can we overload constructors ?
Q What were the early rulers of Japan called?
Q Who has been appointed as the First Director General of National Investigation Agency?