APA1 - Quick JS recap

What will be output on line 7?

• 7

• 13

• 14

• 15

Which line has on it a template string literal?

• Line 1

• Line 2

• Line 4

• Line 6

Which line in this conditional will be executed?

• Line 4

• Line 6

In this code, what is the purpose of the " ? : " symbols?

• It's a conditional ternary operator used to assign a value to canVote based on the age.

• It's a syntax error, and the code won't run.

• It's a shorthand way to define an if-else statement.

• It's used to compare the value of age with 18.

Answer explanation

The ? : symbols represent the ternary operator in JavaScript. It's a concise way to write an if-else statement in a single line. In this case, it checks if age is greater than or equal to 18. If true, it assigns "Yes" to canVote; otherwise, it assigns "No".

In this code, when would the grade be set to "F"?

• When score is greater than or equal to 90.

• When score is between 80 and 89 (inclusive).

• When score is between 70 and 79 (inclusive).

• When score is between 60 and 69 (inclusive).

• When score is less than 60.

Answer explanation

The code uses nested ternary operators to assign a grade based on the score. The final part of the expression : "F" acts as a default case. This means that if none of the previous conditions are met (i.e., the score is not greater than or equal to 60), the grade will be set to "F".

In this code, what would happen if the day was "Tuesday"?

• It would log to the console: "It's the start of the week."

• It would log to the console: "It's midweek!"

• It would log to the console: "It's the weekend!"

• It would log to the console: "It's just another day."

In this code, what would happen if the time was -5?

• It would log "Good morning!" to the console.

• It would log "Good afternoon!" to the console.

• It would log "Good evening!" to the console.

• There would be a syntax error.

What would be the last number logged to the console before the program finishes?

• 0

• 1

• 5

• 10

If we were to add on line 6: console.log(colours.length); , what would be output?

• Syntax error

• 1

• 3

What would be output to the console after line 11 has executed?

• person

• true

• false