Java

Front 1

What is int?

Back 1

Int is short for integer, which are all positive and negative numbers, including zero. This number could represent the number of visits a website has received or the number of programming languages you know.

Front 2

What is boolean?

Back 2

A boolean is a data type that canon only be either true or false.

Front 3

What is char?

Back 3

The char data type is used to represent single characters. That includes the key on a keyboard that area used to produce text. Must be enclose in single quotes.

Front 4

What is a variable?

Back 4

A variable stores a value. All variables must have specified data.

Front 5

What is whitespace?

Back 5

Whitespace is 1 or more characters (such as a space, tab, and enter, or return) that do not produce a visible mark or text. Whitespace is often used to make the code visually presentable.

Front 6

What is a comment?

Back 6

A comment is a text you want java to ignore. Comments allow you to describe code or keep notes.

Front 7

What is a single line comment?

Back 7

A comment that begins with 2 forward slashes. //

Front 8

What is a multi-line comments?

Back 8

Multi-line comments are generally longer comments that can span multiple lines. The begin with /* and end with */.

Front 9

What is product?

Back 9

X * y. Multiplication

Front 10

What is sum?

Back 10

X + y. Addition.

Front 11

What is difference?

Back 11

X - y. Subtraction.

Front 12

What is Quotient?

Back 12

X / y. Division.

Front 13

What is modulo?

Back 13

The modulo operator represents in java by the % symbol. Returns the remainder of dividing two numbers.

Front 14

What are Relational operators?

Back 14

Relational operators compare data types of have a defining order, like numbers (since numbers are getting smaller or larger than other numbers.) Relational operators will always return a boolean value of true or false.

Front 15

<

Back 15

Less than

Front 16

<=

Back 16

Less than or equal to.

Front 17

>

Back 17

Greater than

Front 18

>=

Back 18

Greater than or equal to.

Front 19

What are the equality operators?

Back 19

==: equal to.

!=: not equal to.

Front 20

Data types are

Back 20

Int, boolean, and char.

Front 21

What is Control flow?

Back 21

Writing java programs that can follow different set of instructions depending on the values that we provide to them.

Front 22

Describe boolean operator "and".

Back 22

1. The "and" operator is represented in Java by &&.

2. It returns a boolean value of true only when the expressions on both sides of && are true.

Front 23

Describe boolean operator "or"?

Back 23

1. The "or" operator is represented in java by ||.

2. It returns a boolean value of true when at least one expression on either side of || is true.

Front 24

What is a computer program?

Back 24

A sequence of instructions and decisions.

Front 25

Computers can execute...

Back 25

Very basic instructions in rapid succession.

Front 26

What is programing?

Back 26

The act of designing and implementing computer programs.

Front 27

What is hardware?

Back 27

The physical computer and peripheral devices

Front 28

Software

Back 28

The programs the computer executes

Front 29

What is the functions of a CPU?

Back 29

The central processing unit performs program control and data processing.

Front 30

What is the functions of storage?

Back 30

Memory (primary storage) and secondary storage

Front 31

What is the function of peripherals?

Back 31

To interact with human users.

Front 32

What are the four parts of a computer?

Back 32

CPU, storage, peripherals, networks

Front 33

Java programming language is....

Back 33

Safe

Portable

Platform-independent

Vast set of library packages

Designed for the internet.

Front 34

What is an editor?

Back 34

A program for entering and modifying text, such as a java program. Case sensitive. Compiler translates source code into class files. Class files contain instructions for java virtual machine.

Front 35

What are classes?

Back 35

The fundamental building blocks of java programs.

Front 36

Every source file can contain, at least what?

Back 36

One public class.

Front 37

Each class contains .....

Back 37

A declaration of methods.

Front 38

Each method contains....

Back 38

A sequence of instruction.

Front 39

A method....

Back 39

Contains a collection of programming instructions that describe how to carry out a particular task.

Called by specifying the method and its arguments.

Front 40

Main method

Back 40

Every java application contains a class with a main method. When the application starts, the instructions in the main methods are executed.

Declaring a main method

public static void main(String[] args)

{

.....

}

Front 41

The body of the main methods

Back 41

Statements

Front 42

What is a string?

Back 42

Is a sequence of characters enclosed in double quotation marks?

Front 43

What does System.out.println do?

Back 43

Method prints a string or a number and then starts a new line.

Front 44

What does System.out.print do?

Back 44

Prints an item without starting a new line.

Front 45

What is a compile error (syntax error)?

Back 45

A violation of the programming language rules. Detected by the computer.

Front 46

What is a runtime error (logic error)?

Back 46

Causes the program to perform an action the programmer did not intend.

Front 47

What is an exception?

Back 47

A type of runtime error that generates an error message from java virtual machine. Such as dividing by zero.

Front 48

What is an algorithm?

Back 48

A sequence of steps that is unambiguous, executable, and terminating.

Front 49

What is pseudo code?

Back 49

An informal description of a sequence of steps for solving a problem.

1. Describe how a value is set or changed

2. Describe decisions and repetitions.

3. Use indentation to indicate which statements should be selected or repeated.

4. Indicate results.

Front 50

What translates high-level descriptions into machine code?

Back 50

Compiler

Front 51

What term is used to refer to a sequence of steps for solving a problem that is unambiguous, executable, and terminating?

Back 51

Algorithm

Front 52

Which statement is true about running a java program on a different cpu?

Back 52

You can take the code that has been generated by the java compiler and run it on different CPUs.

Front 53

Which is true about the following java statement: System.out.pringln("Welcome!");

Back 53

There are no errors.

Front 54

Structuring programs and development processes in such a way that an error in one part does not trigger a disastrous response is referred to as __________.

Back 54

Defensive programming

Front 55

Every java program consists of one or more of these fundamental building blocks.

Back 55

Class

Front 56

A ____________ contains sequences of instructions to perform a particular task.

Back 56

Method

Front 57

What is the object in the given method call? System.out.pringln("Welcome");

Back 57

System.out

Front 58

What is the name of the file created after a successful compilation of MyClass.java?

Back 58

MyClass.class

Front 59

When a Java application starts, what is the name of the method that is executed?

Back 59

Main

Front 60

Which type of storage is made from memory chip?

Back 60

Primary storage

Front 61

What is another term used to describe an error causing a program to take an action that the programmer did not intend?

Back 61

Logic error

Front 62

What term is used to refer to information passed in to a method on a call?

Back 62

Parameter

Front 63

Which statement is true about the compiler process?

Back 63

The compiler will continue compiling after it finds an error.

Front 64

What is JVM?

Back 64

A virtual machine that runs compiled Java code on any CPU