Đề thi về C++

C++ Question #1 · What number of digits that can be accuratly stored in a float (based on the IEEE Standard 754)? a) 6b) 38c) An unlimited number Answer: A Question #2 · Which of the following is evaluated first: a) &&b) ||c) ! Answer: C Question #3 · What does 7/9*9 equal (in C and C++)? a) 1b) 0.08642c) 0 Answer: C Question #4 · Which is not valid in C? a) class aClass{public:int x;};b) /* A comment */c) char x=12; Answer: A Question #5 · Which of the following is not a valid declaration for main()? a) int main()b) int main(int argc, char *argv[])c) They both work Answer: C Question #6 · Evaluate as true or false: !(1 &&0 || !1) a) Trueb) Falsec) Invalid statement Answer: AQuestion #7 · Which command properly allocates memory? a) char *a=new char[20];b) char a=new char[20];c) char a=new char(20.0); Answer: A Question #8 · What operator is used to access a struct through a pointer? a) ->b) >>c) * Answer: C Question #9 · Which is not an ANSII C++ function? a) sin()b) kbhit()c) tmpnam() Answer: B Question #10 · True or false, if you keep incrementing a variable, it will become negative? a) Trueb) Falsec) It depends... Answer: C Question #11 · What character terminates all character array strings a) \0b) .c) \END Answer: A Question #12 · If you push the numbers (in order) 1, 3, and 5 onto a stack, which pops out first? a) 5b) 1c) 3 Answer: A Question #13 · What does strcat(an_array, "This"); do? a) Copies "This" into an_arrayb) Adds "This" to the end of an_arrayc) Compares an_array and "This" Answer: B Question #14 · Evaluate:int fn(int v){if(v==1 || v==0)return 1;if(v%2==0)return fn(v/2)+2;elsereturn fn(v-1)+3;}for fn(7); a) 10b) 11c) 1 Answer: B Question #15 · Evalute the following: 22%5a) 2b) 4c) 0 Answer: AQuestion #16 · Which of the following data structures is on average the fastest for retrieving data?a) Binary Treeb) Hash Tablec) Stack Answer: B Question #17 · What is the output:int v(){ int m=0;return m++;}int main(){cout<<v();} a) 1b) 0c) Program is illegal Answer: B Question #18 · What does cout<<(0==0) print out? a) 0b) 1c) Compiler error: Lvalue required Answer: B Question #19 · What is the maximum value of a unsigned char? a) 255b) 256c) 128 Answer: A Question #20 · Evaluate !(1&&1||1&&0) a) Errorb) Truec) False Answer: C