Vector

Question 1

How do you implement In order traversal?

Answer 1

Base case: check if node is null. Recursion through all left subtree, print the node, then recursion through right subtree.

Question 2

How to initialize an empty std::vector in c++?

Answer 2

std::vector<int> vect;</int>

Question 3

How to add a value to a std::vector in c++?

Answer 3

vect.push_back(x);

where x is some value.

Question 4

How to initialize a std::vector with initial values in c++?

Answer 4

std::vector<int> vect{10, 20, 30};</int>

Question 5

What is a quick way to loop through all items in a std::vector using a for loop and : ?

Answer 5

for (int x : vect)
cout &laquo_space;x &laquo_space;” “;

where int is the type of vector.

Question 6

How to create a std::vector with size n and all initialized to the same value?

Answer 6

std::vector<int> vect(n, value) ;</int>

Question 7

What are access specifiers in c++?

Answer 7

Keywords that define the accessibility or visibility level of class members.

Question 8

What is the default access specifier for c++ classes?

Answer 8

By default, class members are private.