C++ và những câu hỏi liên quan

C++ và những câu hỏi liên quan

Question #1

 What number of digits that can be accuratly stored in a float (based on the

IEEE Standard 754)?

b) 38

c) 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++)?

b) 0.08642

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) True

b) False

c) Invalid statement

Answer: A

Question #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) >>

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) True

b) False

c) It depends

Answer: C

Question #11

 What character terminates all character array strings

a) \0

b)

c) \END

Answer: A

Question #12

 If you push the numbers (in order) 1, 3, and 5 onto a stack, which pops

out first?

Answer: A

Question #13

 What does strcat(an_array, "This"); do?

a) Copies "This" into an_array

b) Adds "This" to the end of an_array

c) 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;

else

return fn(v-1)+3;

}

for fn(7);

a) 10

b) 11

Answer: B

Question #15

 Evalute the following: 22%5

Answer: A

Question #16

 Which of the following data structures is on average the fastest for

retrieving data?

a) Binary Tree

b) Hash Table

c) Stack

Answer: B

Question #17

 What is the output:

int v()

{

int m=0;

return m++;

}

int main()

{

cout<<v();

}

c) Program is illegal

Answer: B

Question #18

 What does cout<<(0==0) print out?

c) Compiler error: Lvalue required

Answer: B

Question #19

 What is the maximum value of a unsigned char?

a) 255

b) 256

c) 128

Answer: A

Question #20

 Evaluate !(1&&1||1&&0)

a) Error b) True c) False

Answer: C