Genpact coding

Given a string containing just the characters (, ), {, }, [, and ], determine if the input string is valid — every opening bracket must be closed by the same type of bracket, in the correct order.

Example:

Input: "{[()]}"
Output: true

Input: "{[(])}"
Output: false

This was asked in the Genpact online technical test's "Code output" section. Predict the output of the following JavaScript snippet:

for (var i = 1; i <= 3; i++) {
    setTimeout(() => {
        console.log(i);
    }, i * 1000);
}

Asked in the Genpact technical interview alongside DBMS questions. Write a SQL query to find the second-highest salary from an Employee table.

Example:

Input table: Employee(id, name, salary)
Output: Second highest salary value

Asked in the Genpact Round 1 MCQ section alongside the coding question. Find the next number in the series: 2, 6, 12, 20, 30, ?