Question + Answer of C/C++

Question & Answer of C/C++

·        Why can’t variables be declared in a switch statement

·        What is a local block?

·        Should variables be stored in local blocks?

·        When is a switch statement better than multiple if statements?

·        Can the last case of a switch statement skip including  the break?

·        Is a default case necessary in a switch statement?

·        Other than in a for statement, when is the comma operator used?

·        What is an lvalue?

·        What is the difference between ++var and var++?

·        What is an rvalue?

·        What does the modulus operator do?

·        How can you tell whether a loop ended prematurely?

·        Do variables need to be initialized?

·        Where in memory are my variables stored?

·        What is page thrashing?

·        What is a const pointer?

·        Can a variable be both const and volatile?

·        When should the volatile modifier be used?

·        When should the const modifier be used?

·        When should the register modifier be used? Does it really help?

·        How can you determine the maximum value that a numeric variable can hold?

·        Are there any problems with performing mathematical operations on different variable types?

·        How can you determine the maximum value that a numeric variable can hold?