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questions-all-2.json
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{
"numberOfLevels":2,
"numberOfStages":2,
"numberOfQuestions":5,
"complexity":{
"1":{
"operators":[
"+",
"-"
],
"maxNumber":9
},
"2":{
"operators":[
"+",
"-"
],
"maxNumber":20
},
"3":{
"operators":[
"+",
"-",
"x"
],
"maxNumber":30
}
},
"questionType":{
"open":{
"data":[
{
"questionTitle": "Какой будет результат?",
"questionDescription": [
"2 + 9 + \"1\""
],
"correctAnswer": "\"111\"",
"explanation": "http://javascript.info/type-conversions",
"complexity": "1",
"theme": "Приведение типов"
},
{
"questionTitle": "Какой будет результат?",
"questionDescription": [
"1 + \"2\" + 9"
],
"correctAnswer": "\"129\"",
"explanation": "http://javascript.info/type-conversions",
"complexity": "1",
"theme": "Приведение типов"
},
{
"questionTitle": "Какой будет результат?",
"questionDescription": [
"null + \"8\" / \"4\""
],
"correctAnswer": "2",
"explanation": "http://javascript.info/type-conversions",
"complexity": "2",
"theme": "Приведение типов"
},
{
"questionTitle": "Какой будет результат?",
"questionDescription": [
"(null + \"2\") * \"3\" + 5"
],
"correctAnswer": "\"NaN\"",
"explanation": "http://javascript.info/type-conversions",
"complexity": "2",
"theme": "Приведение типов"
},
{
"questionTitle": "Какой будет результат?",
"questionDescription": [
"Boolean(\"JavaScript\")"
],
"correctAnswer": "true",
"explanation": "http://javascript.info/type-conversions",
"complexity": "1",
"theme": "Приведение типов"
},
{
"questionTitle": "Какой будет результат?",
"questionDescription": [
"Boolean(undefined)"
],
"correctAnswer": "false",
"explanation": "http://javascript.info/type-conversions",
"complexity": "1",
"theme": "Приведение типов"
},
{
"questionTitle": "Что вернет следующий код?",
"questionDescription": [
"console.log(typeof true)"
],
"correctAnswer": "\"boolean\"",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что вернет следующий код?",
"questionDescription": [
"console.log(typeof NaN)"
],
"correctAnswer": "\"number\"",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что вернет следующий код?",
"questionDescription": [
"console.log(typeof typeof(1))"
],
"correctAnswer": "\"string\"",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что вернет следующий код?",
"questionDescription": [
"console.log(typeof 'true')"
],
"correctAnswer": "\"string\"",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что вернет следующий код?",
"questionDescription": [
"console.log(typeof isNaN)"
],
"correctAnswer": "\"function\"",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что вернет следующий код?",
"questionDescription": [
"console.log(typeof null)"
],
"correctAnswer": "\"object\"",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что вернет следующий код?",
"questionDescription": [
"console.log(typeof undefined)"
],
"correctAnswer": "\"undefined\"",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что вернет следующий код?",
"questionDescription": [
"console.log(0.1 + 0.2 == 0.3)"
],
"correctAnswer": "false",
"explanation": "https://www.w3schools.com/js/js_numbers.asp",
"complexity": "2",
"theme": "Типы данных"
},
{
"questionTitle": "Вопрос",
"questionDescription": [
"Какой метод Object.? используется для",
"клонирования объектов?"
],
"correctAnswer": "assign()",
"explanation": "https://medium.com/@Farzad_YZ/3-ways-to-clone-objects-in-javascript-f752d148054d",
"complexity": "2",
"theme": "Объекты"
},
{
"questionTitle": "Что вернёт следующий код?",
"questionDescription": [
"const arr = [10, 12, 15, 21];",
"for (var i = 0; i < arr.length; i++) {",
"setTimeout(function() {",
"console.log('Index: ' + i +'",
", element: ' + arr[i]);",
"}, 3000);",
"}"
],
"correctAnswer": "Index: 4, element: undefined",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Closures",
"complexity": "3",
"theme": "Closures"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"var z = 1, y = z = typeof y;",
"console.log(y);"
],
"correctAnswer": "undefined",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/Operator_Precedence",
"complexity": "2",
"theme": "Типы данных"
},
{
"questionTitle": "Каким будет вывод следующего кода?",
"questionDescription": [
"const CAR = {",
"color: \"blue\",",
"price: 500",
"}",
"CAR.price = 1000;",
"console.log(CAR);"
],
"correctAnswer": "1000",
"explanation": "https://dev.to/ddhogan/scope-and-hoisting-of-variables-functions-and-this-in-javascript-5176",
"complexity": "1",
"theme": "Всплытие"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"num = 6;",
"console.log(num);",
"var num;"
],
"correctAnswer": "6",
"explanation": "https://dev.to/ddhogan/scope-and-hoisting-of-variables-functions-and-this-in-javascript-5176",
"complexity": "1",
"theme": "Всплытие"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"console.log(num);",
"var num = 6;"
],
"correctAnswer": "undefined",
"explanation": "https://dev.to/ddhogan/scope-and-hoisting-of-variables-functions-and-this-in-javascript-5176",
"complexity": "1",
"theme": "Всплытие"
},
{
"questionTitle": "Каким будет вывод следующего кода?",
"questionDescription": [
"new String('Hello') === 'Hello'"
],
"correctAnswer": "false",
"explanation": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Каким будет вывод следующего кода?",
"questionDescription": [
"\"string\" instanceof String;"
],
"correctAnswer": "false",
"explanation": "http://qaru.site/questions/2111/why-does-instanceof-return-false-for-some-literals",
"complexity": "2",
"theme": "Типы данных"
},
{
"questionTitle": "Каким будет вывод следующего кода?",
"questionDescription": [
"var x = [typeof x, typeof y][1];",
"typeof typeof x;"
],
"correctAnswer": "string",
"explanation": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof",
"complexity": "2",
"theme": "Типы данных"
},
{
"questionTitle": "Каким будет вывод следующего кода?",
"questionDescription": [
"(function f() {",
"function f() { return 1; }",
"return f();",
"function f() { return 2; }",
"})();"
],
"correctAnswer": "2",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Statements/function",
"complexity": "2",
"theme": "Функции"
},
{
"questionTitle": "Каким будет вывод следующего кода?",
"questionDescription": [
"alert([] + 1 + 2);"
],
"correctAnswer": "12",
"explanation": "https://medium.com/@sergeybulavyk/%D0%BF%D1%80%D0%B5%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D0%B5-%D1%82%D0%B8%D0%BF%D0%BE%D0%B2-%D0%B2-javascript-35a15ddfc333",
"complexity": "3",
"theme": "Типы данных"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"var module = {",
"x: 42,",
"getX: function() {",
"return this.x;",
"}",
"}",
"var y = module.getX;",
"console.log(y());"
],
"correctAnswer": "undefined",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Global_Objects/Function/bind",
"complexity": "2",
"theme": "Объекты"
}
],
"responseTime":300000
},
"close":{
"data":[
{
"questionTitle": "Кто является основным создателем языка Java Script?",
"questionDescription": [],
"answers": [
"Бил Гейтс",
"Линус Торвальдс",
"Джеймс Гослинг",
"Брендан Эйх"
],
"correctAnswer": "Брендан Эйх",
"explanation": "https://ru.wikipedia.org/wiki/JavaScript",
"complexity": 1,
"theme": "Общие сведения"
},
{
"questionTitle": "Какую строку выведет console.log?",
"questionDescription": [
"var a='1';",
"var b = 1;",
"res = (a == b) + ',' + (a === b);",
"console.log(res);)"
],
"answers": [
"false, false",
"true, true",
"false, true",
"true, false"
],
"correctAnswer": "true, false",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Equality_comparisons_and_sameness",
"complexity": 1,
"theme": "Приведение типов"
},
{
"questionTitle": "Какое значение будет выведено в консоли?",
"questionDescription": [
"result = 0;",
"function addValue(x) {",
"result = result + x;",
"return result;",
"}",
"console.log(addValue(addValue(10)));)"
],
"answers": [
30,
10,
20,
0
],
"correctAnswer": 20,
"explanation": "https://medium.com/@stasonmars/%D1%80%D0%B0%D0%B7%D0%B1%D0%B8%D1%80%D0%B0%D0%B5%D0%BC%D1%81%D1%8F-%D1%81-%D0%BF%D0%BE%D0%B4%D0%BD%D1%8F%D1%82%D0%B8%D0%B5%D0%BC-hoisting-%D0%B2-javascript-7d2d27bc51f1",
"complexity": 1,
"theme": "Всплытие переменных"
},
{
"questionTitle": "Какое значение будет выведено в консоли?",
"questionDescription": [
"var output = (function(x) {",
" delete x;",
" return x;",
"})(0);",
"console.log(output);"
],
"answers": [
"undefined",
"0",
"{}",
"ошибка"
],
"correctAnswer": "0",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/delete",
"complexity": 1,
"theme": "Объекты"
},
{
"questionTitle": "Какое значение будет выведено в консоли?",
"questionDescription": [
"var x = 1;",
"var output = (function(x) {",
" delete x;",
" return x;",
"})();",
"console.log(output);"
],
"answers": [
"undefined",
"0",
"1",
"ошибка"
],
"correctAnswer": "1",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/delete",
"complexity": 1,
"theme": "Объекты"
},
{
"questionTitle": "Какое значение будет выведено в консоли?",
"questionDescription": [
"var x = { foo : 1}",
"var output = (function(x) {",
" delete x.foo;",
" return x.foo;",
"})();",
"console.log(output);"
],
"answers": [
"undefined",
"0",
"{}",
"ошибка"
],
"correctAnswer": "undefined",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/delete",
"complexity": 1,
"theme": "Объекты"
},
{
"questionTitle": "Какое значение будет выведено в консоли?",
"questionDescription": [
"var Employee = {",
" company: 'xyz'",
"}",
"var emp1 = Object.create(Employee);",
"delete emp1.company",
"console.log(emp1.company);"
],
"answers": [
"undefined",
"xyz",
"null",
"ошибка"
],
"correctAnswer": "xyz",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/delete",
"complexity": "2",
"theme": "Объекты"
},
{
"questionTitle": "Какое значение будет выведено в консоли?",
"questionDescription": [
"var trees = ['xyz', 'xxxx', 'test', 'ryan', 'apple'];",
"delete trees[3];",
"console.log(trees.length);"
],
"answers": [
"5",
"4",
"undefined",
"6"
],
"correctAnswer": "5",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/delete",
"complexity": 2,
"theme": "Массивы"
},
{
"questionTitle": "Какое значение будет выведено в консоли?",
"questionDescription": [
"var bar = true;",
"console.log(bar + 0);",
"console.log(bar + 'xyz');",
"console.log(bar + true); ",
"console.log(bar + false);"
],
"answers": [
"'10', 'truexyz', 'truetrue', 'truefalse'",
"1, 2, 2, 1",
"'1', 'truexyz', '11', 1",
"1, 'truexyz', 2, 1"
],
"correctAnswer": "1, 'truexyz', 2, 1",
"explanation": "http://javascript.info/type-conversions",
"complexity": 1,
"theme": "Приведение типов"
},
{
"questionTitle": "Какое значение будет выведено в консоли?",
"questionDescription": [
"var z = 1, y = z = typeof y;",
"console.log(y);"
],
"answers": [
"'undefined'",
"1",
"undefined",
"NaN"
],
"correctAnswer": "'undefined'",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/Operator_Precedence",
"complexity": "3",
"theme": "Операторы"
},
{
"questionTitle": "Что вернет метод fill?",
"questionDescription": [
"[1,2.3,4,5,6].fil(0,2,3)"
],
"answers": [
"[0,2,3,4,5,6]",
"[1,2,0,4,5,6]",
"[1,2,3,0,5,6]",
"[1,2,0,0,0,0]"
],
"correctAnswer": "[1,2,0,4,5,6]",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Global_Objects/Array/fill",
"complexity": "1",
"theme": "Массивы"
},
{
"questionTitle": "Какой из методов массива удалит и вернет первый элемент массива?",
"questionDescription": [],
"answers": [
"pop()",
"shift()",
"unshift()",
"push()"
],
"correctAnswer": "shift()",
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Global_Objects/Array",
"complexity": "1",
"theme": "Массивы"
},
{
"questionTitle": "Number в JS по умолчанию хранятся в:",
"questionDescription": [],
"answers": [
"64 бита",
"32 бита",
"16 бит",
"8 бит"
],
"correctAnswer": [
"64 бита"
],
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Data_structures",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"const x = null || 0 || {name: false};",
"console.log(x);"
],
"answers": [
"0",
"undefined",
"null",
"{name: false}"
],
"correctAnswer": [
"{name: false}"
],
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/%D0%9B%D0%BE%D0%B3%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B5_%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%82%D0%BE%D1%80%D1%8B",
"complexity": "1",
"theme": "Типы данных"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"var scope = \"global\";",
"function outer() {",
"function scope() {",
"console.log(scope);",
"}",
"scope();",
"}",
"outer();"
],
"answers": [
"global",
"object window",
"ReferenceError",
"тело функции scope"
],
"correctAnswer": [
"тело функции scope"
],
"explanation": "http://speakingjs.com/es5/ch16.html",
"complexity": "2",
"theme": "Scope"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"var b = 1;",
"function outer() {",
"var b = 2",
"function inner() {",
"b++;",
"var b = 3;",
"console.log(b);",
"}",
"inner();",
"}",
"outer();"
],
"answers": [
"undefined",
"NaN",
"2",
"3",
"4"
],
"correctAnswer": [
"3"
],
"explanation": "http://speakingjs.com/es5/ch16.html",
"complexity": "2",
"theme": "Scope"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"function () {",
"try {",
"throw new Error();",
"} catch (x) {",
"var x = 1, y = 2;",
"console.log(x);",
"}",
"console.log(x);",
"console.log(y);",
"})();"
],
"answers": [
"1, undefined, 2",
"1, 1, 2",
"1, undefined, undefined"
],
"correctAnswer": [
"1, undefined, 2"
],
"explanation": "https://dev.opera.com/articles/efficient-javascript/?page=2#trycatch",
"complexity": "3",
"theme": "Scope"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"(function(x) {",
"return (function(y) {",
"console.log(x);",
"})(2)",
"})(1);"
],
"answers": [
"undefined",
"2",
"1",
"ReferenceError"
],
"correctAnswer": [
"1"
],
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Closures",
"complexity": "1",
"theme": "Замыкание"
},
{
"questionTitle": "Какой будет результат выполнения?",
"questionDescription": [
"(function() {",
"return typeof arguments;",
"})();"
],
"answers": [
"undefined",
"object",
"array",
"arguments"
],
"correctAnswer": [
"object"
],
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Functions/arguments",
"complexity": "2",
"theme": "Функции"
},
{
"questionTitle": "Какой будет результат выполнения?",
"questionDescription": [
"var f = function g() {",
"return 23;",
"};",
"typeof g();"
],
"answers": [
"undefined",
"function",
"number",
"ReferenceError"
],
"correctAnswer": [
"ReferenceError"
],
"explanation": "http://qaru.site/questions/39198/why-use-named-function-expressions",
"complexity": "2",
"theme": "Функции"
},
{
"questionTitle": "Какой будет результат выполнения?",
"questionDescription": [
"var f = function g() {",
"return 23;",
"};",
"concole.log(typeof g);"
],
"answers": [
"undefined",
"function",
"number",
"ReferenceError"
],
"correctAnswer": [
"undefined"
],
"explanation": "http://qaru.site/questions/39198/why-use-named-function-expressions",
"complexity": "2",
"theme": "Функции"
},
{
"questionTitle": "Какой будет результат выполнения?",
"questionDescription": [
"(function(a) {",
"arguments[0] = 10;",
"return a;",
"})(5);"
],
"answers": [
5,
10,
"undefined",
"ReferenceError"
],
"correctAnswer": [
10
],
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Functions/arguments",
"complexity": "3",
"theme": "Функции"
},
{
"questionTitle": "Что выведет в консоль?",
"questionDescription": [
"var obj = {",
"a: 1",
"};",
"(function(obj) {",
"obj = {",
"a: 2",
"};",
"})(obj);"
],
"answers": [
1,
2,
"undefined",
"ReferenceError"
],
"correctAnswer": [
1
],
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Functions",
"complexity": "3",
"theme": "Функции"
},
{
"questionTitle": "С помощью какого метода объекта события можно отменить стандартное поведение браузера?",
"questionDescription": [],
"answers": [
"cancelEvents()",
"preventEvent()",
"preventDefault()",
"stopPropagation()"
],
"correctAnswer": [
"preventDefault()"
],
"explanation": "https://learn.javascript.ru/default-browser-action",
"complexity": "1",
"theme": "События"
},
{
"questionTitle": "Какой будет результат выполнения?",
"questionDescription": [
"function Car(color) {",
"this.color = color;",
"}",
"var lada = new Car(\"Black\");",
"Car.prototype.currentGear = 1;",
"console.log(++lada.currentGear);",
"console.log(Car.prototype.currentGear);"
],
"answers": [
"1, 2",
"2, 1",
"1, 1",
"2, 2"
],
"correctAnswer": [
"2, 1"
],
"explanation": "https://hackernoon.com/prototypes-in-javascript-5bba2990e04b",
"complexity": "2",
"theme": "Объекты"
},
{
"questionTitle": "В каком порядке выводятся значения в консоль?",
"questionDescription": [
"(function() {",
"console.log(1);",
"setTimeout(function(){console.log(2)}, 1000);",
"setTimeout(function(){console.log(3)}, 0);",
"console.log(4);",
"})();"
],
"answers": [
"1, 2, 3, 4",
"1, 3, 2, 4",
"1, 4, 2, 3",
"1, 4, 3, 2"
],
"correctAnswer": [
"1, 4, 3, 2"
],
"explanation": "https://medium.com/front-end-weekly/javascript-event-loop-explained-4cd26af121d4",
"complexity": "3",
"theme": "События"
},
{
"questionTitle": "В чем особенность событий focus/blur?",
"questionDescription": [],
"answers": [
"у них нет объекта события",
"они не всплывают",
"можно назначить только один обработчик событий",
"нельзя отменить действия браузера по умолчанию"
],
"correctAnswer": [
"они не всплывают"
],
"explanation": "https://learn.javascript.ru/focus-blur",
"complexity": "2",
"theme": "События"
},
{
"questionTitle": "В какой момент времени определяется значение this для метода?",
"questionDescription": [],
"answers": [
"при создании объекта",
"при каждом вызове метода",
"в момент первого вызова метода",
"при создании метода"
],
"correctAnswer": [
"при каждом вызове метода"
],
"explanation": "https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Operators/this",
"complexity": "2",
"theme": "Объекты"
},
{
"questionTitle": "В каком порядке выведутся значения в консоль?",
"questionDescription": [
"(function() {",
"console.log(1);",
"setTimeout(() => console.log(2), 1000);",
"setTimeout(() => console.log(3), 0);",
"Promise.resolve(true).then(() => console.log(4));",
"console.log(5);",
"})();"
],
"answers": [
"1, 2, 3, 4, 5",
"1, 5, 3, 2, 4",
"1, 3, 5, 2, 4",
"1, 5, 4, 3, 2"
],
"correctAnswer": [
"1, 5, 4, 3, 2"
],
"explanation": "https://blog.bitsrc.io/understanding-asynchronous-javascript-the-event-loop-74cd408419ff",
"complexity": "3",
"theme": "События"
},
{
"questionTitle": "В каком порядке выведутся значения в консоль?",
"questionDescription": [
"let promise = new Promise((resolve, reject) => {",
"console.log(1);",
"resolve(2);",
"});",
"promise.then(res => console.log(res));",
"console.log(3);"
],
"answers": [
"1, 2, 3",
"3, 1, 2",
"1, 3, 2",
"3, 2, 1"
],
"correctAnswer": [
"1, 3, 2"
],
"explanation": "https://levelup.gitconnected.com/javascript-and-asynchronous-magic-bee537edc2da",
"complexity": "3",
"theme": "События"
},
{
"questionTitle": "Какой будет результат выполнения?",
"questionDescription": [
"function test() {",
"console.log(a);",
"console.log(foo());",
"var a = 1;",
"function foo() {",
"return 2;",
"}",
"}",
"test();"
],
"answers": [
"undefined, undefined",
"undefined, 2",
"1, 2",
"undefined, function foo()"
],
"correctAnswer": [
"undefined, function foo()"
],
"explanation": "https://dev.to/ddhogan/scope-and-hoisting-of-variables-functions-and-this-in-javascript-5176",
"complexity": "2",
"theme": "Всплытие"
},
{
"questionTitle": "Какой будет результат выполнения?",
"questionDescription": [
"function doSomething() {",
"console.log(bar);",
"console.log(foo);",
"var bar = 1;",
"let foo = 2;",
"}"
],
"answers": [
"undefined, undefined",
"undefined, ReferenceError",
"1, undefined",
"1, 2"
],
"correctAnswer": [
"undefined, ReferenceError"
],
"explanation": "https://dev.to/ddhogan/scope-and-hoisting-of-variables-functions-and-this-in-javascript-5176",
"complexity": "2",
"theme": "Всплытие"
},
{
"questionTitle": "Какой будет результат фызова функции?",
"questionDescription": [
"function varTest() {",
"var x = 1;",
"if (true) {",
"var x = 2;",
"console.log(x);",
"}",
"console.log(x);",
"}"
],
"answers": [
"2, undefined",
"2, 1",
"2, 2",
"SyntaxError"
],