5.Variables

Which of the following are the four types of variables in Java?

• String, int, double, char
• String, int, float, boolean
• String, char, float, boolean
• String, int, float, char

Which operator is used to change the value of a variable in Java?

• ==
• !=
• <=
• =

Which of the following statements is true about a local static instance variable in Java?

• It can only be declared within a method
• It can be declared as both local and static variable
• It can only be used within a single instance of a class
• Memory allocation for static variables occurs every time the method is called

What are the steps to declare a variable in Java?

• Specify the variable's name, provide a value, and end the line with a semicolon
• Provide a name for the variable, end the line with a colon, and specify the variable's data type
• Specify the variable's data type, provide a name for the variable, and end the line with a semicolon
• Specify the variable's value, provide a data type, and end the line with a semicolon

Which of the following describes the Java data types?

• Binary and hexadecimal
• Primitive and non-primitive
• Integers and floating-point
• Functions and procedures

How can we change the value of a variable in Java?

• Using the DEBUG command
• Using the EVAL command with assignment
• Using the PRINT command with assignment
• Using the VAR command with assignment

How can you change a value in a string in C++?

• Double quotes
• Single quotes
• Index position or number
• replace() function

What method can you use in Java to replace a value in a string?

• split()
• substring()
• replaceAll()
• replace()

What is the difference between local instance and static variable?

• Creation and destruction
• Accessibility
• Data storage
• Scope

What is the difference between local and static and instance variable in Java?

• Scope
• Accessibility
• Creation and destruction
• Data storage