Practice questions, with answers and explanations included

The float data type in Java occupies 8 bytes of memory.

Write the SQL statement to delete the table named 'Orders' from the database.

What does Arrays.binarySearch() return if the key element is NOT found in the array?

Object Oriented Programming allows wrapping of data and methods together into a single unit, known as data encapsulation.

Write the SQL statement to add a new column 'Games' of type VARCHAR(20) to the table 'Student'.

Which String class method converts all characters of a string to uppercase?

Inheritance in OOP allows a programmer to give a generic name to various methods or operators.

Write the SQL statement to remove the column 'Games' from the table 'Student'.

For myString = "Hello World", what does myString.charAt(6) return?

What is a Class in Object Oriented Programming?

Write the SQL statement to modify the column 'games' in table 'Student' to be of type INTEGER.

For myString = "Hello World", what does myString.length() return?

What is an Object in Object Oriented Programming?

Which network device is used to connect individual nodes together such that all nodes connected through it form a single LAN?

Which String method checks if a string contains a given substring, returning true/false?

Explain the four numeric integer data types available in Java along with their storage sizes and ranges.

Which of these best describes a 'node' in a computer network?

Which String method compares two strings for equality WITHOUT considering case sensitivity?

Write Java code (assume text fields jTextField1 for Principal, jTextField2 for Rate, jTextField3 for Time, and jTextField4 for the result) to calculate and display Simple Interest on the click of a button.

Which network category is used for communication among devices within about 10 meters of one person?