Analyze the following code: As a result of its execution:
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?
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:
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:
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: The index variable will have the value:
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
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;
Analyze the code snippet. Identify which variables are local and which are global; let name; let age; { let profession; { …
Analyze the code snippet: After declaring a counter variable, we want to put a short comment with information about what the variable is used for. To do this, we modify the line declaration to the form:
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:
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:
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, we have to:
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:
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:
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 one of them is the most readable, indicate which one:
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:
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…
We declare an object called dog, with two fields: age and name: To change the value of the age field to 6 , we need to perform:
We declare an object called dog, with two fields: age and name: let dog = { age: 5. name: "Axel }; To change the value of…
What is not the task of the interpreter?
What is not the task of the interpreter? Transforming the individual commands of the source code into the target form. Creating a runtime environment for the program. Verifying the correctness…
The basic toolkit needed to effectively develop JavaScript code consists of two elements:
The basic toolkit needed to effectively develop JavaScript code consists of two elements: interpreter, package manager. interpreter, debugger. code editor, interpreter. code editor, debugger. Answers Explanation & Hints: The basic…
What tag do we use in HTML to denote the main part of the document inside which we define the page elements?
What tag do we use in HTML to denote the main part of the document inside which we define the page elements? <body> <head> <content> <main> Answers Explanation & Hints:…
Where will we definitely not be able to execute JavaScript code?
Where will we definitely not be able to execute JavaScript code? Directly in the processor. In a server environment using node.js. On a mobile device. In a web browser. Answers…
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