C++ Beginner Quiz 4
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Quiz 4
1. Which command is used to input data from the keyboard?
std::cin >> var;
std::cout << var;
scanf("%d", &var);
2. What defines a local variable?
Declared globally
Declared inside a function/block
Declared as static
3. Which of these is a valid pointer null value in modern C++?
NULL
0
nullptr
4. What is the scope resolution operator?
::
:
->
5. What does `delete` keyword do?
Deletes a class
Frees dynamically allocated memory
Removes a variable
6. How to define a reference to a variable `x`?
int ref x;
int* ref = &x;
int& ref = x;
7. What is the correct syntax for an if-else statement?
if(cond) { } else { }
if[cond] { } then { }
if(cond) then { }
8. Which of these is a sequence container in STL?
map
vector
set
9. What is the operator used to access member via pointer?
::
.
->
10. How do you signify an end-of-line in `cout`?
std::endl
'\n'
Both A and B
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