Practice 50 JavaScript Object Questions
Q1. Write a JavaScript program to create an object representing a car with properties make, model, and year.
Q2. Write a JavaScript program to access the name property of an object representing a person.
Q3. Write a JavaScript program to add a new property color to an object representing a car.
Q4. Write a JavaScript program to update the year property of a car object.
Q5. Write a JavaScript program to delete a property model from a car object.
Q6. Write a JavaScript program to create a method inside an object that returns the car's description.
Q7. Write a JavaScript program to check if a property age exists in an object.
Q8. Write a JavaScript program to clone an object.
Q9. Write a JavaScript program to merge two objects into one.
Q10. Write a JavaScript program to check if an object is empty.
Q11. Write a JavaScript program to count the number of properties in an object.
Q12. Write a JavaScript program to get the values of an object as an array.
Q13. Write a JavaScript program to get the keys of an object as an array.
Q14. Write a JavaScript program to convert an object to a JSON string.
Q15. Write a JavaScript program to parse a JSON string into an object.
Q16. Write a JavaScript program to create an object with a dynamic property name.
Q17. Write a JavaScript program to create a constructor function for a Person object.
Q18. Write a JavaScript program to create a Car object using the Object.create() method.
Q19. Write a JavaScript program to create a property with a getter method in an object.
Q20. Write a JavaScript program to create a property with a setter method in an object.
Q21. Write a JavaScript program to iterate over the properties of an object using a for...in loop.
Q22. Write a JavaScript program to use the Object.freeze() method on an object.
Q23. Write a JavaScript program to check if an object has a specific property using hasOwnProperty().
Q24. Write a JavaScript program to create an object and initialize it with default values.
Q25. Write a JavaScript program to create a class with properties and methods.
Q26. Write a JavaScript program to create an object with a method that modifies a property.
Q27. Write a JavaScript program to merge two objects using the Object.assign() method.
Q28. Write a JavaScript program to create a method that checks if an object contains a specific value.
Q29. Write a JavaScript program to create an object using the new Object() syntax.
Q30. Write a JavaScript program to create a function that checks if an object is an instance of a class.
Q31. Write a JavaScript program to define a function that creates an object with dynamic properties.
Q32. Write a JavaScript program to check if two objects are equal by comparing their properties.
Q33. Write a JavaScript program to define an object and set its properties using a function.
Q34. Write a JavaScript program to create an object with nested properties.
Q35. Write a JavaScript program to use Object.keys() to get the keys of an object.
Q36. Write a JavaScript program to create an object using a JSON string.
Q37. Write a JavaScript program to iterate over an object and print both keys and values.
Q38. Write a JavaScript program to create an object with an array as a property.
Q39. Write a JavaScript program to create an object with a property that stores a function.
Q40. Write a JavaScript program to create a simple inheritance system using objects.
Q41. Write a JavaScript program to modify an object property using the bracket notation.
Q42. Write a JavaScript program to convert an object to an array of its key-value pairs.
Q43. Write a JavaScript program to check if an object contains a specific property using the in operator.
Q44. Write a JavaScript program to create a Person object and dynamically add a property to it.
Q45. Write a JavaScript program to create a simple object with multiple methods.
Q46. Write a JavaScript program to define a Student object with a method that prints "I am a student".
Q47. Write a JavaScript program to create a Rectangle object with a method to calculate the area.
Q48. Write a JavaScript program to create an object and copy all its properties to another object.
Q49. Write a JavaScript program to assign a new value to an object property.
Q50. Write a JavaScript program to check if a property is a number in an object.