What does the following JavaScript code snippet do? Code: let num = 5; while (num > 0) { console.log(num); num--; }
A). Declares a variable and assigns a value to it
B). Executes a block of code repeatedly until a condition becomes false
C). Calculates the sum of numbers from 1 to 5
D). Checks if a number is positive or negative
Which of the following JavaScript statements is used to execute a block of code repeatedly while a condition remains true?
A). Function invocation statement
B). Conditional statement (if statement)
C). Assignment statement
D). Looping statement (while loop)
What is the purpose of the following JavaScript statement? continue;
A). Exits the current loop or switch statement
B). Skips the current iteration in a loop
C). Assigns a value to a variable
D). Continues to the next iteration in a loop
What does the following JavaScript code snippet do? Code: let result = x > 0 ? 'Positive' : (x < 0 ? 'Negative' : 'Zero');
A). Assigns 'Positive' to result if x is greater than 0, 'Negative' if x is less than 0, otherwise 'Zero'
B). Checks if x is greater than 0 and assigns 'Positive', otherwise checks if x is less than 0 and assigns 'Negative', otherwise assigns 'Zero'
C). Assigns 'Positive' to result if x is less than 0, 'Negative' if x is greater than 0, otherwise 'Zero'
D). None of the above
What does the following JavaScript code snippet do? Code: let numbers = [1, 2, 3, 4, 5]; for (let i = 0; i < numbers.length; i++) { console.log(numbers[i]); }
A). Prints all elements of the array numbers
B). Calculates the sum of elements in the array numbers
C). Finds the maximum element in the array numbers
D). Checks if all elements in the array numbers are even
What is the purpose of the following JavaScript statement? break;
A). Assigns a value to a variable
B). Exits the current loop or switch statement
C). Skips the current iteration in a loop
D). Continues to the next iteration in a loop
What will be the output of the following JavaScript code? Code: let nums = [1, 2, 3, 4, 5]; for (let n of nums) { if (n % 2 === 0) { console.log(n); } }
A). 1 3 5
B). 2 4 6
C). 1 2 3 4 5
D). 2 4
What is the purpose of the following JavaScript statement? let name = 'John';
A). Declare a function
B). Declare a variable
C). Print a message to the console
D). Loop through an array
What does the following JavaScript code snippet do? Code: let numbers = [1, 2, 3, 4, 5]; let sum = 0; for (let num of numbers) { sum += num; } console.log(sum);
A). Finds the maximum number in the array numbers
B). Calculates the average of numbers in the array numbers
C). Sums all numbers in the array numbers
D). Checks if all numbers in the array numbers are even
Which of the following JavaScript statements is used to execute different code based on a specified condition?
A). Function declaration statement
B). Assignment statement
C). Conditional statement (if statement)
D). Looping statement (for loop)