JavaScript Basics - Variables and Operators

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Variables and Operators

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Minh Nhat Pham

Viet Nam

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JavaScript Basics - Variables and Operators


JavaScript Basics - Variables and OperatorsVersion en ligne Variables and Operators par Minh Nhat Pham 1 What keyword is best for a variable that can change value? a var b let c const d fixed 2 Which keyword declares a constant value? a var b let c const d value 3 What is the result of `5 + 3`? a 53 b 8 c 2 d 35 4 What does `10 % 3` equal? a 1 b 0 c 3 d 2 5 Which operator adds 1 to a variable? a ++ b -- c += 2 d + 6 Which operator subtracts 1 from a variable? a ++ b -- c -= d - 7 What does `let x = 5; x += 3;` make x equal? a 8 b 53 c 2 d 15 8 Which symbol is used for multiplication? a * b x c mult d # 9 What is the result of `10 / 2`? a 2 b 5 c 20 d 12 10 Which operator gives remainder after division? a % b / c // d mod 11 What does `5 == "5"` return? a TRUE b FALSE c error d undefined 12 What does `5 === "5"` return? a TRUE b FALSE c error d undefined 13 Which keyword is rarely used in modern JavaScript? a let b const c var d none 14 What is the output of `let a = 7; a -= 2;`? a 5 b 2 c 9 d 0 15 Which operator means "greater than"? a < b > c == d === 16 Which operator means "less than"? a < b > c <= d => 17 What is the result of `3 * 4`? a 12 b 7 c 34 d 1 18 What is the result of `20 % 6`? a 2 b 4 c 0 d 6 19 What is the result of `2 ** 3`? a 5 b 6 c 8 d 9 20 What does `let x = 10; x /= 2;` make x equal? a 2 b 5 c 20 d 0 21 Which operator checks equality without type conversion? a == b = c === d => 22 Which operator assigns a value to a variable? a = b == c === d := 23 What is the output of `let y = 9; y--;`? a 8 b 9 c 10 d error 24 Which operator combines addition and assignment? a + b ++ c += d =+ 25 Which operator checks inequality? a != b == c === d !== 26 What is the output of `let a = 15 % 4;`? a 3 b 2 c 1 d 4 27 What is the result of `true == 1`? a TRUE b FALSE c error d undefined 28 What is the result of `true === 1`? a TRUE b FALSE c error d undefined 29 Which operator multiplies and assigns the value? a = b =* c x= d 30 What is the value of `let n = 2; n = 3;`? a 6 b 9 c 8 d 5

JavaScript Basics - Variables and Operators

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Créé par

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JavaScript Basics - Variables and OperatorsVersion en ligne

par Minh Nhat Pham

What keyword is best for a variable that can change value?

Which keyword declares a constant value?

What is the result of `5 + 3`?

What does `10 % 3` equal?

Which operator adds 1 to a variable?

Which operator subtracts 1 from a variable?

What does `let x = 5; x += 3;` make x equal?

Which symbol is used for multiplication?

What is the result of `10 / 2`?

Which operator gives remainder after division?

What does `5 == "5"` return?

What does `5 === "5"` return?

Which keyword is rarely used in modern JavaScript?

What is the output of `let a = 7; a -= 2;`?

Which operator means "greater than"?

Which operator means "less than"?

What is the result of `3 * 4`?

What is the result of `20 % 6`?

What is the result of `2 ** 3`?

What does `let x = 10; x /= 2;` make x equal?

Which operator checks equality without type conversion?

Which operator assigns a value to a variable?

What is the output of `let y = 9; y--;`?

Which operator combines addition and assignment?

Which operator checks inequality?

What is the output of `let a = 15 % 4;`?

What is the result of `true == 1`?

What is the result of `true === 1`?

Which operator multiplies and assigns the value?

What is the value of `let n = 2; n **= 3;`?