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Most answered questions in Programming and DS

152 votes

16 answers

1

GATE CSE 2016 Set 2 | Question: 40
The number of ways in which the numbers $1, 2, 3, 4, 5, 6, 7$ can be inserted in an empty binary search tree, such that the resulting tree has height $6$, is _________. Note: The height of a tree with a single node is $0$.

Akash Kanase asked in DS Feb 12, 2016

by Akash Kanase

39.3k views

56 votes

14 answers

2

GATE CSE 2018 | Question: 46
The number of possible min-heaps containing each value from $\{1,2,3,4,5,6,7\}$ exactly once is _______

gatecse asked in DS Feb 14, 2018

29.8k views

57 votes

12 answers

3

GATE CSE 2017 Set 2 | Question: 55
Consider the following C program. #include<stdio.h> #include<string.h> int main() { char* c="GATECSIT2017"; char* p=c; printf("%d", (int)strlen(c+2[p]-6[p]-1)); return 0; } The output of the program is _______

Madhav asked in Programming Feb 14, 2017

by Madhav

21.2k views

122 votes

12 answers

4

GATE CSE 2016 Set 1 | Question: 41
Let $Q$ denote a queue containing sixteen numbers and $S$ be an empty stack. $Head(Q)$ returns the element at the head of the queue $Q$ without removing it from $Q$. Similarly $Top(S)$ returns the element at the top of $S$ without removing ... = Pop(S); Enqueue (Q, x); end end The maximum possible number of iterations of the while loop in the algorithm is _______.

Sandeep Singh asked in DS Feb 12, 2016

by Sandeep Singh

24.8k views

32 votes

12 answers

5

GATE CSE 2015 Set 2 | Question: 10
A binary tree T has $20$ leaves. The number of nodes in T having two children is ______.

go_editor asked in DS Feb 12, 2015

24.4k views

157 votes

12 answers

6

GATE IT 2007 | Question: 29
When searching for the key value $60$ in a binary search tree, nodes containing the key values $10, 20, 40, 50, 70, 80, 90$ are traversed, not necessarily in the order given. How many different orders are possible in which these key values can occur on the search path from the root to the node containing the value $60$? $35$ $64$ $128$ $5040$

Ishrat Jahan asked in DS Oct 30, 2014

by Ishrat Jahan

31.9k views

50 votes

12 answers

7

GATE CSE 2010 | Question: 10
In a binary tree with $n$ nodes, every node has an odd number of descendants. Every node is considered to be its own descendant. What is the number of nodes in the tree that have exactly one child? $0$ $1$ $\frac{(n-1)}{2}$ $n-1$

go_editor asked in DS Sep 29, 2014

12.6k views

76 votes

12 answers

8

GATE CSE 2003 | Question: 64
Let S be a stack of size $n \geq1$. Starting with the empty stack, suppose we push the first n natural numbers in sequence, and then perform $n$ pop operations. Assume that Push and Pop operations take $X$ seconds each, and $Y$ seconds elapse between the end of one such ... S. The average stack-life of an element of this stack is $n(X+Y)$ $3Y+2X$ $n(X+Y)-X$ $Y+2X$

Kathleen asked in DS Sep 17, 2014

22.3k views

75 votes

11 answers

9

GATE CSE 2017 Set 1 | Question: 08
Consider the C code fragment given below. typedef struct node { int data; node* next; } node; void join(node* m, node* n) { node* p = n; while(p->next != NULL) { p = p->next; } p->next = m; } Assuming that m and n ... append list m to the end of list n. cause a null pointer dereference for all inputs. append list n to the end of list m for all inputs.

khushtak asked in DS Feb 14, 2017

20.2k views

40 votes

11 answers

10

GATE CSE 2017 Set 1 | Question: 35
Consider the following two functions. void fun1(int n) { if(n == 0) return; printf("%d", n); fun2(n - 2); printf("%d", n); } void fun2(int n) { if(n == 0) return; printf("%d", n); ... printf("%d", n); } The output printed when $\text{fun1}(5)$ is called is $53423122233445$ $53423120112233$ $53423122132435$ $53423120213243$

Arjun asked in Programming Feb 14, 2017

by Arjun

15.5k views

39 votes

11 answers

11

GATE CSE 2016 Set 1 | Question: 35
What will be the output of the following $C$ program? void count (int n) { static int d=1; printf ("%d",n); printf ("%d",d); d++; if (n>1) count (n-1); printf ("%d",d); } void main(){ count (3); } $3 \ 1 \ 2 \ 2 \ 1 \ 3 \ 4 \ 4 \ 4$ $3 \ 1 \ 2 \ 1 \ 1 \ 1 \ 2 \ 2 \ 2$ $3 \ 1 \ 2 \ 2 \ 1 \ 3 \ 4$ $3 \ 1 \ 2 \ 1 \ 1 \ 1 \ 2$

Sandeep Singh asked in Programming Feb 12, 2016

by Sandeep Singh

11.1k views

40 votes

11 answers

12

GATE CSE 2015 Set 3 | Question: 25
Consider a binary tree T that has $200$ leaf nodes. Then the number of nodes in T that have exactly two children are ______.

go_editor asked in DS Feb 14, 2015

17.6k views

38 votes

11 answers

13

GATE IT 2007 | Question: 30
Suppose you are given an implementation of a queue of integers. The operations that can be performed on the queue are: $isEmpty (Q)$ - returns true if the queue is empty, false otherwise. $delete (Q)$ - deletes the element at the front of the queue ... the front of the queue $Q$ and inserts it at the rear keeping the other elements in the same order Empties the queue $Q$

Ishrat Jahan asked in DS Oct 30, 2014

by Ishrat Jahan

13.0k views

54 votes

11 answers

14

GATE IT 2007 | Question: 28
Consider a hash function that distributes keys uniformly. The hash table size is $20$. After hashing of how many keys will the probability that any new key hashed collides with an existing one exceed $0.5$. $5$ $6$ $7$ $10$

Ishrat Jahan asked in DS Oct 30, 2014

by Ishrat Jahan

22.8k views

68 votes

11 answers

15

GATE CSE 1994 | Question: 1.11
In a compact single dimensional array representation for lower triangular matrices (i.e all the elements above the diagonal are zero) of size $n \times n$, non-zero elements, (i.e elements of lower triangle) of each row are stored one after another, starting from the first row, the index of the ... is: $i+j$ $i+j-1$ $(j-1)+\frac{i(i-1)}{2}$ $i+\frac{j(j-1)}{2}$

Kathleen asked in DS Oct 4, 2014

22.2k views

80 votes

11 answers

16

GATE CSE 2014 Set 1 | Question: 12
Consider a rooted n node binary tree represented using pointers. The best upper bound on the time required to determine the number of subtrees having exactly $4$ nodes is $O(n^a\log^bn)$. Then the value of $a+10b$ is __________.

go_editor asked in DS Sep 26, 2014

18.5k views

88 votes

11 answers

17

GATE CSE 2004 | Question: 85
A program takes as input a balanced binary search tree with $n$ leaf nodes and computes the value of a function $g(x)$ for each node $x$. If the cost of computing $g(x)$ ... time complexity of the program is? $\Theta (n)$ $\Theta (n \log n)$ $\Theta(n^2)$ $\Theta (n^2\log n)$

Kathleen asked in DS Sep 19, 2014

22.0k views

64 votes

10 answers

18

GATE CSE 2010 | Question: 53
A hash table of length $10$ uses open addressing with hash function $h(k) = k \: \mod \: 10$, and linear probing. After inserting $6$ ... of the key values using the same hash function and linear probing will result in the hash table shown above? $10$ $20$ $30$ $40$

go_editor asked in DS Apr 21, 2016

22.0k views

54 votes

10 answers

19

GATE CSE 2015 Set 3 | Question: 26
Consider the following C program #include<stdio.h> int main() { static int a[] = {10, 20, 30, 40, 50}; static int *p[] = {a, a+3, a+4, a+1, a+2}; int **ptr = p; ptr++; printf("%d%d", ptr-p, **ptr); } The output of the program is _______.

go_editor asked in Programming Feb 15, 2015

16.6k views

51 votes

10 answers

20

GATE IT 2006 | Question: 9
In a binary tree, the number of internal nodes of degree $1$ is $5$, and the number of internal nodes of degree $2$ is $10$. The number of leaf nodes in the binary tree is $10$ $11$ $12$ $15$

Ishrat Jahan asked in DS Oct 31, 2014

by Ishrat Jahan

21.4k views

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