✅ A. Vehicle is moving at a speed of 100 km/h. This car is red ❌ B. Car is moving at a speed of 100 km/h. This car is red ❌ C. This car is red ❌ D. Compilation error ❌ E. Runtime error ❌ F. None of the above
Explanation: The code defines two classes Vehicle and Car. Vehicle is a superclass that has a protected instance variable speed and a method move() that prints the current speed of the vehicle. Car is a subclass of Vehicle that adds a private instance variable color and a method display() that prints the color of the car. The Main class creates a Car object myCar with a speed of 100 and a color of "red". The move() method is called on myCar, which is inherited from Vehicle, and it prints "Vehicle is moving at a speed of 100 km/h". The display() method is then called on myCar and it prints "This car is red". Therefore, the correct answer is option A Vehicle is moving at a speed of 100 km/h and This car is red. The output first shows the message printed by the move() method of the Vehicle superclass, and then the message printed by the display() method of the Car subclass.
✅ A. Vehicle is moving at a speed of 100 km/h. This car is red ❌ B. Car is moving at a speed of 100 km/h. This car is red ❌ C. This car is red ❌ D. Compilation error ❌ E. Runtime error ❌ F. None of the above
Explanation: The code defines two classes Vehicle and Car. Vehicle is a superclass that has a protected instance variable speed and a method move() that prints the current speed of the vehicle. Car is a subclass of Vehicle that adds a private instance variable color and a method display() that prints the color of the car. The Main class creates a Car object myCar with a speed of 100 and a color of "red". The move() method is called on myCar, which is inherited from Vehicle, and it prints "Vehicle is moving at a speed of 100 km/h". The display() method is then called on myCar and it prints "This car is red". Therefore, the correct answer is option A Vehicle is moving at a speed of 100 km/h and This car is red. The output first shows the message printed by the move() method of the Vehicle superclass, and then the message printed by the display() method of the Car subclass.
BY Explanations “Top Java Quiz Questions”
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Telegram is a free app and runs on donations. According to a blog on the telegram: We believe in fast and secure messaging that is also 100% free. Pavel Durov, who shares our vision, supplied Telegram with a generous donation, so we have quite enough money for the time being. If Telegram runs out, we will introduce non-essential paid options to support the infrastructure and finance developer salaries. But making profits will never be an end-goal for Telegram.
Telegram auto-delete message, expiring invites, and more
elegram is updating its messaging app with options for auto-deleting messages, expiring invite links, and new unlimited groups, the company shared in a blog post. Much like Signal, Telegram received a burst of new users in the confusion over WhatsApp’s privacy policy and now the company is adopting features that were already part of its competitors’ apps, features which offer more security and privacy. Auto-deleting messages were already possible in Telegram’s encrypted Secret Chats, but this new update for iOS and Android adds the option to make messages disappear in any kind of chat. Auto-delete can be enabled inside of chats, and set to delete either 24 hours or seven days after messages are sent. Auto-delete won’t remove every message though; if a message was sent before the feature was turned on, it’ll stick around. Telegram’s competitors have had similar features: WhatsApp introduced a feature in 2020 and Signal has had disappearing messages since at least 2016.
