4 pillars

Question 1

This is to make sure that “sensitive” data is hidden from users.

Answer 1

Encapsulation

Question 2

Ways to do encapsulation

Answer 2

Declare a Class variables/attributes as private
Provide public get and set methods to access and update the value of a private.

Question 3

Creating new classes based on existing ones.

Answer 3

Inheritance

Question 4

the class that inherits from another class

Answer 4

subclass (child)

Question 5

the class being inherited.

Answer 5

superclass(parent)

Question 6

Allows us to perform a single action in different ways.

Answer 6

Polymorphism

Question 7

is the process of hiding certain details and showing only essential information to the user.

Answer 7

Abstraction

Question 8

is a restricted class that cannot be used to create objects (to access it, it must be inherited from another class).

Answer 8

abstract class

Question 9

can only be used in an abstract class, and it does not have a body. The body is provided by the subclass (inherited from).

Answer 9

abstract method

Question 10

illegal operation performed by the user which results in the abnormal working of the program

Answer 10

error

Question 11

true or false:
Programming errors often remain undetected until the program is compiled or executed

Answer 11

true

Question 12

true or false: Some of the errors inhibit the program from getting compiled or executed. Thus errors should be removed before compiling and executing.”

Answer 12

true

Question 13

are detected during the execution of the program. Sometimes these are discovered when the user enters an invalid data or data which is not relevant

Answer 13

run time errors

Question 14

True or false: Runtime errors occur when a program does not contain any syntax errors but asks the computer to do something that the computer is unable to reliably do.During compilation, the compiler has no technique to detect these kinds of errors.

Answer 14

true

Question 15

detects it while the program is running.

Answer 15

Java virtual machine

Question 16

true or false: To handle the error during the run time we can put our error code inside the try block and catch the error inside the catch block.

Answer 16

true

Question 17

are those errors which prevent the code from running because of an incorrect syntax such as a missing semicolon at the end of a statement or a missing bracket, class not found, etc. These errors are detected by the java compiler and an error message is displayed on the screen while compiling

Answer 17

Compile Time Errors

Question 18

Compile Time Errors are sometimes also referred to as

Answer 18

Syntax Error

Question 19

True or False: Compile Time errors are easy to spot and rectify because the java compiler finds them for you. The compiler will tell you which piece of code in the program got in trouble and its best guess as to what you did wrong. Usually, the compiler indicates the exact line where the error is, or sometimes the line just before it, however, if the problem is with incorrectly nested braces, the actual error may be at the beginning of the block.

Answer 19

True

Question 20

What does syntax error represent in the use of programming?

Answer 20

Grammatical errors

Question 20

true or false: Misspelled variable name or method names is one of the examples of compile time errors

Answer 20

true

Question 22

true or false : Missing semicolons is one of the examples of compile time errors.

Answer 22

true

Question 23

true or false: Missing parenthesis, square brackets, or curly braces is not one of the example of compile time errors.

Answer 23

false, it is one of the example of compile time errors

Question 24

When your program compiles and executes, but does the wrong thing or returns an incorrect result or no output when it should be returning an output.

Answer 24

Logic Error

Question 25

true or false: The Java system has no idea what your program is supposed to do, so it provides no additional information to help you find the error.

Answer 25

true

Question 26

true or false:Accidentally using an incorrect operator on the variables to perform an operation (Using ‘/’ operator to get the modulus instead using ‘%’) in one of the examples of logic error

Answer 26

true

Question 27

true or false: Displaying the wrong message is one of the examples of logic error

Answer 27

true

Question 28

What do we call in repetition statements?

Answer 28

loops

Question 29

are used to repeat the same code multiple times in succession.

Answer 29

loops

Question 30

three loop structures in Java

Answer 30

• while loops
• do-while loops
• for loops

Question 31

true or false:Three types of loops are not actually needed, but having the different forms is convenient

Answer 31

true

Question 32

is a test condition that is evaluated to decide whether the loop should repeat or not.

Answer 32

boolean expression

Question 33

means run the loop body again.

Answer 33

true

Question 34

means quit in loop

Answer 34

false

Question 35

true or false: Thewhileanddo/whileloops both follow the same basic flowchart

Answer 35

true

Question 36

, the test expression is checked first

Answer 36

while loop

Question 37

the loop “body” is executed first

Answer 37

do/while loop