Question 1 |
Consider the C function foo and the binary tree shown.

When foo is called with a pointer to the root node of the given binary tree, what will it print?
typedef struct node {
int val;
struct node *left, *right;
} node;
int foo(node *p) {
int retval;
if (p == NULL)
return 0;
else {
retval = p->val + foo(p->left) + foo(p->right);
printf("%d ", retval);
return retval;
}
}

When foo is called with a pointer to the root node of the given binary tree, what will it print?
3 8 5 13 11 10 | |
3 5 8 10 11 13 | |
3 8 16 13 24 50 | |
3 16 8 50 24 13 |
Question 1 Explanation:
Question 2 |
Consider a complete binary tree with 7 nodes. Let A denote the set of first 3 elements obtained by performing Breadth-First Search (BFS) starting from the root. Let B denote the set of first 3 elements obtained by performing Depth-First Search (DFS) starting from the root.
The value of |A-B| is _____________
The value of |A-B| is _____________
3 | |
4 | |
1 | |
2 |
Question 2 Explanation:
Question 3 |
The post-order traversal of binary tree is ACEDBHIGF. The pre-order traversal is
A B C D E F G H I | |
F B A D C E G I H | |
F A B C D E G H I | |
A B D C E F G I H |
Question 3 Explanation:
Question 4 |
Let T be a full binary tree with 8 leaves. (A full binary tree has every level full.) Suppose two leaves a and b of T are chosen uniformly and independently at random. The expected value of the distance between a and b in T (i.e., the number of edges in the unique path between a and b) is (rounded off to 2 decimal places) ___________ .
2.5 | |
4.25 | |
6.5 | |
3.75 |
Question 4 Explanation:
Question 5 |

Which traversals of Tree-1 and Tree-2, respectively, will produce the same sequence?
Preorder, postorder | |
Postorder, inorder | |
Postorder, preorder | |
None of these |
Question 5 Explanation:
There are 5 questions to complete.
In Question no 8.
Sir please correct option no C)
to
-+1*76^2-5*43
Thank You Abhishek Chavle,
We have updated the answer.
Question no 47
Options A , C , D are correct
Thank You Abhishek Chavle,
We have updated the answer.
In question no. 41
only B option is correct.