Total 20 question (100 marks)
- 1. How to check the age variable is a number or not? var age ="12abc";
- 2. What is the data type of age variable below? var age =+ "50" alert(typeof(age));
- 3. What is the result of the below code block? alert(age); var age = 10;
- 4. How to assign value to the myName variable but still keep old value? Select the right answer.
- 5. What is the result of the below block code? var a = 1; alert(++a);
- 6. What is the result of the below block code? age = 18; alert(age);
- 7. What is the output of the block code below? var a =+ '10'; var b = 2 alert(a + b);
- 8. What is the result of the below code block? alert(age); let age = 10;
- 9. What is different between let and var in Javascript?
- 10. How to Look for the biggest number between two numbers?
- 11. What is the result of a variable when execute command bellow? var a = "I'm " + true; alert(a);
- 12. How to rounding 7.25 number to get an integer?
- 13. How to comment on multiple line codes in Javascript?
- 14. What is the difference between == and === compare operators in Javascript?
- 15. How to declare a variable in javascript?
- 16. What is the result of the below block code? var a = 1; alert(a++);
- 17. What is the alert value of the below code? var a = parseInt("3abc1"); var b = 3; alert(a * b)
- 18. What is the mean of += operator in the below code? var fullname = "Jonh"; fullname += " Hug"; alert(fullname);
- 19. How to comment one line in javascript?
- 20. What is the operator allow assign value to a variable?