Tag: Interview

The Serializable interface gets us automatic serialization capability for objects of our class. On the other hand, the Externalizable interface provides a way to implement a custom serialization mechanism. A…

const one = [`aaa`, `bbb`, `ccc`] const two = [`ddd`, `eee`, `fff`] You have the above arrays.How will you merge those into a single array? You can use concat method.This method will…

Here are three key steps you can take to improve the memory footprint: Limiting the scope of local variables. Each time the top scope from the stack is popped up,…

Returning null is usually the best idea if you intend to indicate that no data is available. An empty object implies data has been returned, whereas returning null clearly indicates that nothing has been…

Busy spin is one of the technique to wait for events without releasing CPU. It’s often done to avoid losing data in CPU cached which is lost if the thread…