The methods window.altert, window.confirm, and window.prompt are methods of the window object. Which of the following is not true? The alert, confrim, and prompt methods require an argument specifying the position of…
Analyze the code snippet: let nr = "1"; let x = (nr === 1); let y = (nr == 1); let z = (nr = 1); After its execution, the…
The string "12" has been written into the str variable: (let str = "12";). Then the operations str = +str is performed. As a result, the variable str will contain: NaN 12…
The confirm method allows you to create a dialog box. What value does this method return when the user closes the window? Always true. Always false. The string entered by…
Analyze the code snippet: let n = 10; let m = ++n; Its execution will result in the following values in the variables n and m: n: 11, m: 10 n: 10, m:…
The result of the comparison "abcd" > "Abcd" will be: "abcd" true false 1 Answers Explanation & Hints: The result of the comparison "abcd" > "Abcd" will be true. When comparing…
Analyze the code snippet: let n = 2 * 3 ** 3 - 1; The result is stored in the variable n is: 18 36 215 53 Answers Explanation &…
The number 2 is stored in the variable n (let n = 2;). The command n = n*n*n is then called. This last command can be replaced by: n **= n; n **=…
The result of the operation !(true && false || true) will be: null false 1 true Answers Explanation & Hints: The result of the operation "!(true && false || true)" will…
Which operator do we use if we want to check if two variables store the same values of exactly the same type? = === == !== Answers Explanation & Hints:…
Analyze the following code: let test = prompt("Hello", "World"); What value will the test variable have if, after running the code, we immediately press the Ok button on the newly created…
The result of the operation 3 * 4 > 20 - 15 will be: NaN false true -14 Answers Explanation & Hints: To evaluate the expression "3 * 4 >…
The result of the operation false || "false" will be: 0 "false" false true Answers Explanation & Hints: The result of the operation false || "false" in JavaScript is indeed false.…
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…