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# System prepended metadata

title: Telephonic Node Developer Questions

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# Telephonic Node Developer Questions

## Js
- [ ] 1. let, var, arrow & normal function hoisting
- [ ] 2. map vs forEach vs reduce
- [ ] 3. Async await in loops
- [ ] 4. 1+2+'3'? 
- [ ] 5. Name some libraries/packages you have used?
 

## Sql
Table: Employees

| Employee name | Salary | Country |
| -------- | -------- | -------- |
| A     | 1000     | India     |
| B     | 500     | Russia     |
| C     | 2000     | India     |


- [ ] 1. get 2nd highest salary from employee table
- [ ] 2. List the number of employees in each country which has more than 1 employee

## MongoDb
- [ ] 1. Difference between $all & $in?
- [ ] 2. Difference between save & insert?

## Logic
- [ ] 1. Find the missing number between 1 to 10 in an array.
- [ ] 2. Reverse an array in place.

## Git
- [ ] 1. git merge vs rebase