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feat(curriculum): Create a JavaScript Math Objects and Operators Quiz (#56539)
Co-authored-by: Naomi <accounts+github@nhcarrigan.com> Co-authored-by: Ilenia <26656284+ilenia-magoni@users.noreply.github.com> Co-authored-by: Krzysztof G. <60067306+gikf@users.noreply.github.com>
This commit is contained in:
Cristina Jean Donato
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GitHub
GitHub
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5b7521d697
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0ab1ff43a6
+136
-100
@@ -17,439 +17,475 @@ Answer all of the questions below correctly to pass the quiz.
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#### --text--
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Placeholder question
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What is the result of this code?
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``` js
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const num1 = Number('888');
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const num2 = new Number('777');
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console.log(num1 === 888);
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console.log(num2 === 777);
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```
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#### --distractors--
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Placeholder distractor 1
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```js
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true
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true
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```
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---
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Placeholder distractor 2
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```js
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false
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false
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```
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---
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Placeholder distractor 3
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```js
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false
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true
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```
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#### --answer--
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Placeholder answer
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```js
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true
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false
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```
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### --question--
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#### --text--
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Placeholder question
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Which of the following is not an arithmetic operator in JavaScript?
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#### --distractors--
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Placeholder distractor 1
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`%`
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---
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Placeholder distractor 2
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`+`
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---
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Placeholder distractor 3
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`--`
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#### --answer--
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Placeholder answer
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`==`
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### --question--
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#### --text--
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Placeholder question
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Which of the following will log the correct gross profit?
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#### --distractors--
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Placeholder distractor 1
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``` js
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let store1_sales = 7500;
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let store2_sales = 6000;
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console.log("Total Sales: " + store1_sales + store2_sales);
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```
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---
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Placeholder distractor 2
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``` js
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let store1_sales = 7500;
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let store2_sales = 6000;
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console.log("Total Sales: " + store1_sales - store2_sales);
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```
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---
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Placeholder distractor 3
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``` js
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let store1_sales = 7500;
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let store2_sales = 6000;
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console.log("Total Sales: " + (store1_sales - store2_sales));
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```
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#### --answer--
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Placeholder answer
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``` js
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let store1_sales = 7500;
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let store2_sales = 6000;
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console.log("Total Sales: " + (store1_sales + store2_sales));
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```
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### --question--
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#### --text--
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Placeholder question
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What is the result of the statement `25 * 4 - 16 / (2 * 4) + 8`?
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#### --distractors--
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Placeholder distractor 1
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`18.5`
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---
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Placeholder distractor 2
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`107.5`
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---
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Placeholder distractor 3
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`17`
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#### --answer--
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Placeholder answer
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`106`
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### --question--
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#### --text--
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Placeholder question
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Which operator should you use when decrementing a variable in JavaScript?
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#### --distractors--
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Placeholder distractor 1
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`++`
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---
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Placeholder distractor 2
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`//`
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---
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Placeholder distractor 3
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`**`
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#### --answer--
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Placeholder answer
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`--`
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### --question--
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#### --text--
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Placeholder question
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Which of the following is not a bitwise operator?
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#### --distractors--
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Placeholder distractor 1
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`&`
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---
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Placeholder distractor 2
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`|`
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---
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Placeholder distractor 3
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`^`
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#### --answer--
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Placeholder answer
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`>`
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### --question--
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#### --text--
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Placeholder question
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Which of the following is the correct compound operator for getting the remainder?
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#### --distractors--
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Placeholder distractor 1
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`//=`
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---
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Placeholder distractor 2
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`\=`
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---
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Placeholder distractor 3
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`%%=`
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#### --answer--
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Placeholder answer
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`%=`
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### --question--
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#### --text--
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Placeholder question
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What is the difference between the `==` and `===` operators?
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#### --distractors--
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Placeholder distractor 1
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There is no difference. The comparison result will always have the same result.
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---
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Placeholder distractor 2
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The `==` operator is used to check if the data type is the same while the `===` is used to check if the value is equal.
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---
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Placeholder distractor 3
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The `==` operator can only be used with primitive types while the `===` operator is only used for objects.
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#### --answer--
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Placeholder answer
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The `==` operator only compares values whereas the `===` operator compares values and types.
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### --question--
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#### --text--
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Placeholder question
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Which of the following statements are false about unary plus (`+`) operators?
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#### --distractors--
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Placeholder distractor 1
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It tries to convert the operand into a number.
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---
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Placeholder distractor 2
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It is the fastest way to convert an operand to a number.
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---
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Placeholder distractor 3
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It can convert operands with negative numbers except for hexadecimals.
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#### --answer--
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Placeholder answer
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It can't convert `true`, `false`, or `null` into a number.
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### --question--
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#### --text--
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Placeholder question
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Which method in the built-in Math object is used to round up a number?
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#### --distractors--
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Placeholder distractor 1
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`Math.round(num)`
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---
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Placeholder distractor 2
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`Math.floor(num)`
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---
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Placeholder distractor 3
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`Math.fround(num)`
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#### --answer--
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Placeholder answer
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`Math.ceil(num)`
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### --question--
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#### --text--
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Placeholder question
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Which of the following Math object methods are used to raise a base to a power?
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#### --distractors--
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Placeholder distractor 1
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`Math.exp(base, power)`
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---
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Placeholder distractor 2
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`Math.raise(base, power)`
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---
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Placeholder distractor 3
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`Math.e(base, power)`
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#### --answer--
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Placeholder answer
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`Math.pow(base, power)`
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### --question--
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#### --text--
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Placeholder question
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Which of the following is the correct method for generating a random number in JavaScript?
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#### --distractors--
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Placeholder distractor 1
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`Math.rand(1,10)`
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---
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Placeholder distractor 2
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`Math.rand()`
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---
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Placeholder distractor 3
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`Math.random(1,10)`
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#### --answer--
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Placeholder answer
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`Math.random()`
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### --question--
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#### --text--
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Placeholder question
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Which of the following will return `false`?
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#### --distractors--
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Placeholder distractor 1
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`isNaN("1998", "1999")`
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---
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Placeholder distractor 2
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`isNaN({})`
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---
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Placeholder distractor 3
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`isNaN(undefined)`
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#### --answer--
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Placeholder answer
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`isNaN(null)`
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### --question--
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#### --text--
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Placeholder question
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Which of the following will convert `172` to its hexadecimal equivalent?
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#### --distractors--
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Placeholder distractor 1
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`(-0xa5).toString(2);`
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---
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Placeholder distractor 2
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`(172).string(0x);`
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---
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Placeholder distractor 3
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`(172).parseString(0x);`
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#### --answer--
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Placeholder answer
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`(172).toString(16);`
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### --question--
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#### --text--
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Placeholder question
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Which of the following is the right way to convert a string to an integer?
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#### --distractors--
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Placeholder distractor 1
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`parseINT("300")`
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---
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Placeholder distractor 2
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`int("300")`
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---
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Placeholder distractor 3
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`integer("300")`
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#### --answer--
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Placeholder answer
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`parseInt("300")`
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### --question--
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#### --text--
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Placeholder question
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Which of the following statements is false?
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#### --distractors--
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Placeholder distractor 1
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`parseFloat()` ignores trailing invalid characters
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---
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Placeholder distractor 2
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`parseFloat()` can parse a string that begins with `Infinity` or `-Infinity`
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---
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Placeholder distractor 3
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`parseFloat("0x1f")` will return `0`
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#### --answer--
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Placeholder answer
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`parseFloat()` requires two parameters
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### --question--
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#### --text--
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Placeholder question
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Which of the following is false?
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#### --distractors--
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Placeholder distractor 1
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A number greater than 100 as an argument to the `Number.prototype.toFixed()` method will result to a range error
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---
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Placeholder distractor 2
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`Number.prototype.toFixed(numDecimalPlaces)` is used to return a number converted to a string with decimals places depending on the argument
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---
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Placeholder distractor 3
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Calling the `Number.prototype.toFixed()` method on a number object with decimal points and no argument will round the number to the nearest ones
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#### --answer--
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Placeholder answer
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Using `Number.prototype.toFixed()` without an argument will by default add a decimal point followed by a zero
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### --question--
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#### --text--
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Placeholder question
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Which of the following is not a comparison operator?
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#### --distractors--
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Placeholder distractor 1
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`!=`
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---
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Placeholder distractor 2
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`>=`
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---
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Placeholder distractor 3
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`===`
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#### --answer--
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Placeholder answer
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`!>`
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### --question--
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#### --text--
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Placeholder question
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Which of the following is false?
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#### --distractors--
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Placeholder distractor 1
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Exponentiation has a lower operator precedence than the grouping operator `()`.
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---
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Placeholder distractor 2
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Postfix operators like `x++` or `x--` has higher precedence than prefix operators.
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---
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Placeholder distractor 3
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Relational operators like `>` or `<` has higher precedence than equality operators.
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#### --answer--
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Placeholder answer
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Logical operator like `AND` and `OR` have higher precedence than bitwise operators.
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### --question--
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#### --text--
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Placeholder question
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`Math.random()` returns a number in what range?
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#### --distractors--
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Placeholder distractor 1
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`Math.random()` returns a number between 0 (inclusive) and 1 (inclusive)
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---
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Placeholder distractor 2
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`Math.random()` returns a number between 0 (exclusive) and 1 (inclusive)
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---
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Placeholder distractor 3
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`Math.random()` returns a number between 0 (exclusive) and 1 (exclusive)
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#### --answer--
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Placeholder answer
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`Math.random()`returns a number between 0 (inclusive) and 1 (exclusive)
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