Brane Enterprises Java Developer Interview Questions and Answers

Static variables and methods belong to the class rather than instances of the class.

• Static variables are shared among all instances of a class.

• Static methods can be called without creating an instance of the class.

• Example: public static int count = 0; public static void incrementCount() { count++; }

For loop is used when the number of iterations is known, while While loop is used when the condition is true.

• For loop is used when the number of iterations is known beforehand.

• While loop is used when the condition is true.

• For loop has initialization, condition, and increment/decrement in one line.

• While loop only has a condition to check before each iteration.

• Example: for(int i=0; i<5; i++) { //code }

• Example: int i = 0; while(i < 5) { //code i++; }

A do-while loop is a control flow statement that executes a block of code at least once, and then repeatedly as long as a specified condition is true.

• The code block is executed first before checking the condition.

• The condition is checked after the code block is executed, and if it is true, the code block is executed again.

• The loop continues until the condition becomes false.

• Example: do { System.out.println('Hello'); } while (condition);

Static variables and methods belong to the class rather than the instance of the class.

• Static variables are shared among all instances of the class

• Static methods can be called without creating an instance of the class

• Static variables and methods are accessed using the class name, not an instance variable

• Example: Math.PI is a static variable in the Math class

• Example: Math.sqrt() is a static method in the Math class

While loop is used when the number of iterations is unknown, whereas for loop is used when the number of iterations is known.

• While loop checks the condition before executing the code block, whereas for loop checks the condition after executing the code block

• For loop is more concise and readable when the number of iterations is known

• While loop is more flexible and can be used for infinite loops or when the number of iterations is not known

• Example of while loop: while(i < 10) {...read more

A do while loop is a control flow statement that executes a block of code at least once, and then repeatedly executes the block, or not, depending on a given condition.

• The loop body is executed at least once before the condition is checked

• The loop continues to execute until the condition becomes false

• Syntax: do { // code block } while (condition);

• Example: do { System.out.println(i); i++; } while (i < 5);