Java Programming Fundamentals: Key Concepts and Best Practices

Java Programming Fundamentals

Variables and Data Types

• Which of the following options is not a variable? Literal
• A block of related data elements is called a table.
• According to convention, the dollar sign character is never used to start a variable name.
• An object is a software bundle related to its state.
• Using 16-bit Unicode.
• You can use the short data type to save memory in large tables.
• You do not need to assign a value when a field is declared.
• Each item in a table is called an element.
• Parameters are always variables.
• The length of a table is set when the table is created.

Operators and Expressions

• The operator with the highest priority is evaluated before operators with lower priority.
• Operators on the same line have equal priority.
• If the name of your variable is composed of lowercase letters, only use one word.
• The name of your variable must not be a keyword.
• Unary operators require only one operand.
• "++" is an example of an operator used to increment a value.
• The conditional operator is also known as the ternary operator.
• An expression consists of variables, operators, and method invocations.
• In the example "1 * 2 * 3", the result is always the same.
• "x + y / 100" is an example of an ambiguous expression.
• The statements "x + y / 100" and "x + (y / 100)" are equivalent.
• Unary operators perform various operations, such as incrementing or decrementing a value.
• The increment/decrement operator can be applied before or after the operand.
• The Java programming language supports different kinds of operators.
• You can formulate expressions composed of several smaller expressions, as long as the data type required by one part of the expression matches the data type of the others.
• Some expressions can be converted into statements by ending them with a semicolon.

Control Flow Statements

• A block is a group of zero or more statements.
• The body of a switch statement is known as a switch block.
• The break statement has two forms: labeled and unlabeled.
• Which of the following options is not a synonym for the word "concatenate"? Different
• Control flow statements interrupt the normal flow of execution.
• A synonym for "break up" is division.
• The value of testScore can meet more than one expression in the statement: 76 >= 70 and 76 >= 60. A synonym for "meet" is satisfy.
• The while statement continuously executes a block of statements while a condition is true.
• The difference between do-while and while is that do-while evaluates its expression at the bottom of the loop instead of the top.