Citicorp Senior Software Engineer Interview Questions, Process, and Tips

HashMap is faster than TreeMap wrto performance due to its constant time complexity for most operations.

• HashMap has O(1) time complexity for most operations while TreeMap has O(log n) time complexity.

• HashMap is implemented using an array of buckets while TreeMap is implemented using a Red-Black Tree.

• HashMap is preferred for frequent read operations while TreeMap is preferred for frequent write operations.

• HashMap is uno...read more

Yes, it is possible to write a try catch block inside a catch block.

• This is called nested try-catch block.

• It is useful when we want to handle different types of exceptions in different ways.

• Example: try { //code } catch (ExceptionType1 e1) { try { //code } catch (ExceptionType2 e2) { //code } } }

• It is important to avoid excessive nesting as it can make the code difficult to read and maintain.

Yes, multiple exceptions can be caught in a single catch block separated by commas.

• Multiple exceptions can be caught in a single catch block separated by commas.

• This can be useful when handling different types of exceptions in a similar way.

• For example: catch (IOException | SQLException ex) { // handle exception }