The result of the operation 20 || 5 will be: 5 25 20 true Answers Explanation & Hints: In JavaScript, the double vertical bar "||" is indeed used as the logical…
Point out the correct declaration of the height variable: height; height is variable; let height; variable height; Answers Explanation & Hints: In JavaScript, variables are typically declared using the let…
We have declared an array let animals = ["dog", "cat", "hamster"];. We want to temporarily comment out the element "cat", and to do this, we can modify the declaration as follows:…
We have declared an array of selected month names let summer = ["June", "July", "August"];. We want to change the value "July" stored in the array to the number 7: summer[1] =…
What does shadowing mean? Declaring a global variable with the same name as a previously declared global variable. Changing the value of a variable. Deleting and rewriting a selected piece…
Complex (or composite) data types: is an alternative name for primitive types. may consist of multiple elements, of which is of a primitive type. may consist of multiple elements, each…
Performing the operation: let x = "Alice" + 10; will result in: the program execution to abort due to an error. the value NaN of Number type to be stored in the…
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: 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…