Question
If a program crashes with a "NullPointerException" (or
similar null reference error), what is the most likely cause?Solution
A NullPointerException occurs when a program tries to use an object reference that currently points to null (meaning no object) as if it were a valid object. This typically happens when trying to call a method on a null reference or access a field of a null reference.
A fish is at a depth d below the surface of a water tank. A cat observes the fish from air. Due to refraction at water-air interface, the apparent depth...
A 60 W lightbulb is connected to a 120V power source. What is the resistance of the bulb?
Which organ removes carbon dioxide from the blood?
Two blocks of unequal mass are connected by a string and placed on a smooth horizontal surface. A force F is applied on the heavier block. The tension i...
In alchemy, aqua fortis is the classical name of which chemical compound that is used chiefly in the manufacture of explosives and fertilisers, and in o...
Which of the following diseases can NOT be spread through air?
The Amrita Devi Bishnoi Wildlife Protection Award is given in the memory of Amrita Devi Bishnoi, who sacrificed her life along with 363 others for the p...
What is the common name of calcium hydroxide?
The main function of centriole is:
Which among the following nutrients is essential for the normal functioning of the thyroid gland?
