## Question 1
Are the parentheses in the following string valid or not?

"`(){}[]`"
### Options

1. Not valid
Incorrect

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2. Valid
Correct
Parentheses are valid, since, for every opening bracket, there is a closing bracket in the correct order.
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## Question 2
Are the parentheses in the following string valid or not?

"`{}[]{}[{}])`"
### Options

1. Not valid
Correct
All the parentheses are matched, except the last, which is a closing parenthesis without a matching opening parenthesis.
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2. Valid
Incorrect

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