23-11-20

Find the missing number 2 , 3 , 7 , 8 , 13 , 14 , ?

24

21

18

20

Ans : 20

Which of the following queries can be used to select data from one table and insert it into another?
1. SELECT ALL COPY newtable [IN externaldb] FROM Table1;
2. SELECT * COPY newtable [IN externaldb] FROM Table1;
3. SELECT * INTO newtable [IN externaldb] FROM Table1;
4. SELECT ALL INTO newtable [IN externaldb] FROM Table1;

Ans: *SELECT * INTO newtable [IN externaldb] FROM Table1;
Explanation : https://www.w3schools.com/sql/sql_select_into.aspâ€‹

A linked list is given such that each node contains an additional random pointer which could point to any node in the list or `NULL`

.

Return a deep copy of the list. Given list 1 -> 2 -> 3 with random pointers going from

1 -> 3 2 -> 1 3 -> 1 You should return a deep copy of the list. The returned answer should not contain the same node as the original list, but a copy of them. The pointers in the returned list should not link to any node in the original input list.

unordered_map<RandomListNode*,RandomListNode*>m;RandomListNode* Solution::copyRandomList(RandomListNode* A) {if(!A) return NULL;m[A]=new RandomListNode(A->label);m[A]->next=copyRandomList(A->next);m[A]->random=m[A->random];return m[A];}â€‹