SDE - 1

A database table named Loan_Records is given below:

What is the output of the following SQL query?

SELECT COUNT(*) 
FROM (
   (SELECT Borrower, Bank_Manager FROM Loan_Records) AS S
   NATURAL JOIN
   (SELECT Bank_Manager, Loan_Amount FROM Loan_Records) AS T
);

You are given an array 'arr' of length 'n'. Find the index(0-based) of a peak element in the array. If there are multiple peak numbers, return the index of any peak number.

Peak element is defined as that element that is greater than both of its neighbors. If 'arr[i]' is the peak element, 'arr[i - 1]' < 'arr[i]' and 'arr[i + 1]' < 'arr[i]'.

Assume 'arr[-1]' and 'arr[n]' as negative infinity.

Note:

1.  There are no 2 adjacent elements having same value (as mentioned in the constraints).
2.  Do not print anything, just return the index of the peak element (0 - indexed).
3. 'True'/'False' will be printed depending on whether your answer is correct or not.

Example:

Input: 'arr' = [1, 8, 1, 5, 3]

Output: 3

Explanation: There are two possible answers. Both 8 and 5 are peak elements, so the correct answers are their positions, 1 and 3.

You're given a string 'S' consisting of "{", "}", "(", ")", "[" and "]" .

Return true if the given string 'S' is balanced, else return false.

For example:

'S' = "{}()".

There is always an opening brace before a closing brace i.e. '{' before '}', '(' before ').
So the 'S' is Balanced.

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