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fix(curriculum): JS variables and data types quiz (#58274)
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Tom
@@ -17,7 +17,7 @@ To pass the quiz, you must correctly answer at least 17 of the 20 questions belo
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#### --text--
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What is JavaScript?
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Which of the following best describes JavaScript?
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#### --distractors--
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@@ -33,7 +33,7 @@ A database management system.
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#### --answer--
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A programming language primarily used for web development.
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A programming language used for web development.
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### --question--
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@@ -43,19 +43,19 @@ Which of the following is NOT a JavaScript data type?
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#### --distractors--
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`null`
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`Number`
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---
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`undefined`
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`Undefined`
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---
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`bigInt`
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`Object`
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#### --answer--
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`double`
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`Double`
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### --question--
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@@ -77,29 +77,29 @@ Which of the following is NOT a valid JavaScript variable declaration?
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#### --answer--
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`public final Long x;`
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`public Int x;`
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### --question--
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#### --text--
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Which of the following is a conventional variable name in JavaScript?
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Which of the following is a common naming convention for variables in JavaScript?
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#### --distractors--
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`my_var`
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JavaScript case
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---
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`my-var`
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Lightning case
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---
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`MyVar`
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Giraffe case
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#### --answer--
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`myVar`
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Camel case
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### --question--
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@@ -127,28 +127,23 @@ What is the difference between `let` and `const` variable declarations in JavaSc
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#### --text--
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What would be the outcome of the following code?
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```js
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let name = "Andy";
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name[0] = "M";
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```
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Why are strings considered immutable in JavaScript?
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#### --distractors--
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The value of `name` would be `"MAndy"`.
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You cannot create strings using variables.
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---
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The value of `name` would be `"Mndy"`.
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Strings can only be created using literals.
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---
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The value of `name` would still be `"Andy"`.
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You can change strings, but only through global variables.
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#### --answer--
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It would throw an error.
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Once a string is created, you cannot change its characters directly.
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### --question--
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@@ -186,7 +181,7 @@ console.log(hello);
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#### --distractors--
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Reassigns `world` to the variable `hello`, and prints it out in the console.
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Reassigns `" world"` to the variable `hello`, and prints it out in the console.
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---
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@@ -194,33 +189,33 @@ Prints out the number of characters in `Hello world` in the console.
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---
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Adds the string `world` to the variable `hello`, and prints it out in the console.
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Combines `"Hello"` and `" world"` into a new string and prints it, but the value of `hello` remains `"Hello"`.
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#### --answer--
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Creates a new string that is made of the values of `hello` and `" world"` combined together, and assigns this new string back to `hello` and then prints it out in the console.
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Combines the current value of `hello` with the string `" world"`, reassigns it to `hello`, and prints it to the console.
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### --question--
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#### --text--
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Are semicolons required in JavaScript?
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Which JavaScript character is used to mark the end of a statement?
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#### --distractors--
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Yes. The code won't work without semicolons.
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`:`
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---
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Semicolons are sometimes required in JavaScript.
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`,`
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---
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No. It's recommended not to use semicolons in JavaScript.
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`.`
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#### --answer--
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No, but it is generally recommended to use semicolons consistently to avoid potential issues in code.
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`;`
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### --question--
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@@ -264,7 +259,7 @@ JavaScript performs type checking before execution, meaning type related errors
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#### --answer--
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You don't need to declare the data type of a variable before using it. JavaScript infers the type based on the value assigned to the variable.
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JavaScript infers the type based on the value assigned to the variable.
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### --question--
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@@ -410,7 +405,7 @@ Which of the following is NOT a valid string concatenation method in JavaScript?
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---
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``console.log(`${string1} ${string2}`);``
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`console.log("string1 " + string2);`
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---
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@@ -424,7 +419,7 @@ Which of the following is NOT a valid string concatenation method in JavaScript?
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#### --text--
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Which of the following variable names uses camelCase correctly?
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Which of the following variable names uses camel case correctly?
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#### --distractors--
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@@ -446,23 +441,23 @@ Which of the following variable names uses camelCase correctly?
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#### --text--
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Which character JavaScript uses to mark the end of a statement?
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Why is it beneficial to use semicolons explicitly even though JavaScript has Automatic Semicolon Insertion?
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#### --distractors--
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`:`
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To increase the execution speed of the code.
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---
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`,`
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To maintain consistency with other programming languages.
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---
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`.`
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To allow for better debugging and error tracing.
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#### --answer--
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`;`
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To improve code readability and reliability.
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### --question--
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@@ -485,4 +480,3 @@ Which of the following is NOT a JavaScript data type?
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#### --answer--
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`Float`
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