HEPL - A Cavinkare Group Company Interview Questions, Process, and Tips for Freshers

Exception handling in Java involves using try-catch blocks to manage errors gracefully and maintain application stability.

• Use try-catch blocks to catch exceptions: try { // code that may throw an exception } catch (ExceptionType e) { // handle exception }

• Use finally block for cleanup: try { // code } catch (Exception e) { // handle exception } finally { //...read more

Update query to modify data in a database table

• Use UPDATE statement followed by table name

• Set the column(s) to be updated using SET keyword

• Specify the new values for the column(s) to be updated

• Add WHERE clause to specify the condition for updating specific rows

There are 12 columns in Bootstrap grid system.

• Bootstrap grid system is divided into 12 columns.

• Columns can be combined to create different layouts.

• Example:

  will create a column that spans half of the row.

Java is a compiled language that is first compiled into bytecode and then interpreted by the Java Virtual Machine (JVM).

• Java is first compiled into bytecode by the Java compiler.

• The bytecode is then interpreted by the Java Virtual Machine (JVM) at runtime.

• This combination of compilation and interpretation makes Java a compiled language with some interpreted features.

A for loop is a control flow statement for iterating a specific number of times.

• Used to iterate over a range of values or elements in an array

• Consists of initialization, condition, and increment/decrement expressions

• Example: for(int i=0; i<5; i++) { System.out.println(i); }

Collections in Java are frameworks that provide an architecture to store and manipulate a group of objects.

• Collections provide interfaces (List, Set, Map) and classes (ArrayList, LinkedList, HashSet, HashMap) to store and manipulate groups of objects.

• Collections framework includes algorithms to manipulate data structures like sorting, searching, etc.

• Collections are more flexible and efficient than arrays in Java.

• Exampl...read more

Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.

• Use try-catch blocks to handle exceptions

• Use finally block to execute code regardless of exception

• Use throw keyword to manually throw exceptions

• Use throws keyword in method signature to declare exceptions that can be thrown