Review the following code (note the variable name): let age = 32; age = age + 1; console.log(Age); As a result of its execution, the following should appear in the…
Performing the operation: let x = 100 / 0; will result in an Infinity value being stored in the variable x. the value NaN being stored in the variable x. the value…
Performing the operation: let x = 20n + 10; will: result in the string "20n10" being stored in the variable x. cause the program to abort due to an error. result in…
Analyze the code snippet: let name; let age; { let height; // 2 { // 2 { let weight; // 1 // 2 console.log(name); // 1 // 2 // 2…
We have declared an array of animals let animals = ["dog", "cat", "hamster"];. Then we call the method animals.pop();. As a result, the animals array will look like this: ["dog", "cat"] ["cat",…
Analyze the following code: let x = 10 /100; console.log(typeof (x)); As a result of its execution: an error will appear because JavaScript does not allow operations on fractional numbers.…
We want to declare a distance constant and initialize it with the value 120. What should such a declaration look like? const distance = 120; const distance; distance = 120;…
We perform the operation: let x = "abcdefg".slice(2, 4). As a result, the value: "ab" will be written to the variable x "cd" will be written to the variable x "cdef"…
We have declared an array of animals let animals = ["dog", "cat", "hamster"];. Then we call the method animals.push("canary");. As a result, the animals array will look like this: ["dog",…
Analyze the code snippet: let summer = ["June", "July", "August"]; let index = summer.indexOf("June"); The index variable will have the value: 0 1 True "June" Answers Explanation & Hints: The…
We want to convert the string "1024" to type Number and store the result in variable n. Point out the correct statement let n = Number("1024"); let n = String("1024"); let n = StringToNumber("1024"); let…
Analyze the code snippet. Identify which variables are local and which are global; let name; let age; { let profession; { …
Analyze the code snippet: let counter = 0; let userName = "John"; After declaring a counter variable, we want to put a short comment with information about what the variable is…
The msg variable contains a String type value. Information about the number of characters of this string can be obtained using: msg.chars msg.charsAt() msg.length msg.length() Answers Explanation & Hints: To obtain…
If a variable stores the value false, then the variable: is of the Logical type. is of the Math type. is of the Boolean type. will no longer be used in…
By default, JavaScript allows us to write to an undeclared variable (it declares it implicitly for us). If we want the interpreter to treat such a situation as an error,…
In the daysOfWeek variable, we place an array with the names of the days of the week. To reverse the order of the array elements, we should call: reverse daysOfWeek; daysOfWeek.invert();…
We can replace the declaration let x = 0x21; with: let x = "0x21" let x = 33; let x = 17; let x = 21; Answers Explanation & Hints: The…
We need to come up with a name for a variable where we will store the age of a user. All of the following variable names are formally correct, but…
In order to check the number of elements of the array stored in the names variable, we call: names.length names.count length of names; names.length(); Answers Explanation & Hints: To check the…