Variables and Operators - 1 - Free MCQ Practice Test with solutions, Software
MCQ Practice Test & Solutions: Test: Variables and Operators - 1 (15 Questions)
You can prepare effectively for Software Development JavaScript for Web Development with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Variables and Operators - 1". These 15 questions have been designed by the experts with the latest curriculum of Software Development 2026, to help you master the concept.
Test Highlights:
- - Format: Multiple Choice Questions (MCQ)
- - Duration: 30 minutes
- - Number of Questions: 15
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Which keyword is used to declare variables in JavaScript?
Detailed Solution: Question 1
Which of the following is NOT a valid variable name in JavaScript?
Detailed Solution: Question 2
What is the result of the following expression: "5" + 2?
Detailed Solution: Question 3
What is the value of x after executing the following code?
let x = 5;
x += 3;
x += 3;
Detailed Solution: Question 4
Which of the following is NOT a JavaScript number method?
Detailed Solution: Question 5
What is the output of the following code?
let x = 10;
let y = "5";
console.log(x + y);
let y = "5";
console.log(x + y);
Detailed Solution: Question 6
What will be printed to the console when executing the following code?
let x = 10;
let y = 5;
console.log("The sum is: " + (x + y));
let x = 10;
let y = 5;
console.log("The sum is: " + (x + y));
Detailed Solution: Question 7
What is the output of the following code?
let x = 5;
let y = "2";
console.log(x - y);
let x = 5;
let y = "2";
console.log(x - y);
Detailed Solution: Question 8
What will be the value of result after executing the following code?
let x = 5;
let y = 2;
let result = x % y;
let x = 5;
let y = 2;
let result = x % y;
Detailed Solution: Question 9
What will be printed to the console when executing the following code?
let x = 10;
let y = 3;
console.log(x / y);
let x = 10;
let y = 3;
console.log(x / y);
Detailed Solution: Question 10
What is the value of x after executing the following code?
let x = 5;
x++;
x += 2;
let x = 5;
x++;
x += 2;
Detailed Solution: Question 11
What will be the value of result after executing the following code?
let x = 10;
let y = 3;
let result = Math.pow(x, y);
let x = 10;
let y = 3;
let result = Math.pow(x, y);
Detailed Solution: Question 12
What is the value of x after executing the following code?
let x = 5;
x *= 3 - 1;
let x = 5;
x *= 3 - 1;
Detailed Solution: Question 13
What will be printed to the console when executing the following code?
let x = 5;
let y = 2;
console.log(x % y);
let x = 5;
let y = 2;
console.log(x % y);
Detailed Solution: Question 14
What is the output of the following code?
let x = "Hello";
let y = "World";
console.log(x + " " + y);
let x = "Hello";
let y = "World";
console.log(x + " " + y);
Detailed Solution: Question 15
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