What will be the output of the following JavaScript code? Code: let x = 8; if (x % 2 === 0) { console.log('Even'); } else { console.log('Odd'); }
A). A) Even
B). B) Odd
C). C) 8
D). D) None of the above
What will be the output of the following JavaScript code? Code: console.log(typeof null);
A). A) Object
B). B) Null
C). C) Undefined
D). D) String
What does the following JavaScript code snippet do? Code: let numbers = [1, 2, 3, 4, 5]; let sum = numbers.reduce((total, num) => total + num, 0); console.log(sum);
A). A) Finds the maximum number in numbers
B). B) Calculates the average of numbers in numbers
C). C) Sums all numbers in numbers
D). D) Checks if all numbers in numbers are even
What does the following JavaScript code snippet do? Code: let x = 'Hello'; let y = x.length; console.log(y);
A). A) Stores the length of the string x in y
B). B) Converts x to uppercase
C). C) Converts x to lowercase
D). D) Finds the index of a character in x
What will be the output of the following JavaScript code? Code: let x = 30; if (x % 2 === 0) { console.log('Even'); } else { console.log('Odd'); }
A). A) Even
B). B) Odd
C). C) 30
D). D) None of the above
What does the following JavaScript code snippet do? Code: let a = 10; let b = 20; let temp = a; a = b; b = temp; console.log(a, b);
A). A) Swaps the values of a and b
B). B) Adds a and b
C). C) Checks if a is equal to b
D). D) Multiplies a and b
What does the following JavaScript code snippet do? Code: let x = 5; let y = x++; console.log(x, y);
A). A) Increments x and assigns to y
B). B) Decrements x and assigns to y
C). C) Assigns x to y and then increments x
D). D) Assigns x to y and then decrements x
What does the following JavaScript code snippet do? Code: let x = 'Hello'; console.log(x.toUpperCase());
A). A) Converts x to lowercase
B). B) Reverses the characters in x
C). C) Converts x to uppercase
D). D) Adds spaces to x
What will be the output of the following JavaScript code? Code: console.log('Hello' + 1 + 2);
A). A) Hello12
B). B) Hello3
C). C) Hello
D). D) TypeError: cannot convert number to string
What does the following JavaScript code snippet do? Code: let names = ['Alice', 'Bob', 'Charlie']; let message = 'Names: ' + names.join(', '); console.log(message);
A). A) Adds names to an array
B). B) Joins names from an array into a single string
C). C) Splits names into an array
D). D) Reverses the order of names in an array