Testing and Running a Solution

Question 1

What is a syntax error?

Answer 1

The statement in the code doesn’t follow the rules of the language. It is usually detected by a translator and the program will not be complied

Question 2

What are common syntax errors?

Answer 2

Missing/extra brackets
Misspelling variables
Missing parts of a multiline statement

Question 3

What is a logic error?

Answer 3

The syntax code is correct but the code doesn’t do what it is intended to do. This is usually detected while testing. It as sometimes cause a run-time error.

Question 4

What are common logic errors?

Answer 4

Incorrect mathematical formula
Misplaced brackets
Instructions written in the wrong order
Incorrect conditions provided for loops

Question 5

What is a run-time error?

Answer 5

The syntax and the logic of the code are correct but an extreme circumstance has caused the program to crash as it has attempted an impossible operation. This is usually detected while testing.

Question 6

What are common run-time errors?

Answer 6

Division by 0
Calculating square root of a negative number
Overflow error
Stack overflow error

Question 7

What is valid data?

Answer 7

Data that you would normally expect the user to input

Question 8

What is invalid data?

Answer 8

Data that should generate and error message

Question 9

What is borderline data?

Answer 9

Data that lies at the boundaries between different cases

Question 10

What is black box testing?

Answer 10

Tests the input to see if the output is expectedTests, valid, invalid and boundries

Question 11

What is white box testing?

Answer 11

Algorithm is tested. Every possible path or route is executed

Question 12

What is alpha testing?

Answer 12

Testing carried out by a restricted group within the company. Any bugs are reported and fixed

Question 13

What is beta testing?

Answer 13

Program is released to potential users outside the company, if any bugs still exist these are reported to the company

Question 14

What is acceptance testing?

Answer 14

Complete and demonstrated to the user and show that it works correctly. Program is tested against the requirements

Question 15

How can you identify an error within code?

Answer 15

Translator diagnostics
Breakpoints
Variable checks
Dry runs

Question 16

What do translator diagnostics do?

Answer 16

Useful for finding syntax errors and logic errors. A message is generated when converting the source code to executable code.

Question 17

What are breakpoints?

Answer 17

Program halts at a specific marker. The program can then check the values of variables

Question 18

What are variable checks?

Answer 18

Outputting the value of the variables at specific points or when they change

Question 19

What is a dry run?

Answer 19

Goes through the code line by line often using a trace table. This provides a systematic way of recording.

Question 20

What is the 3 steps are needed when installing a written program?

Answer 20

Needs to be converted into executable object code that the computer can understand
Make sure that the program will run correctly
To install the program you must set the program to run on the end users computer by copying the executable and setting up and files and user options.

Question 21

What functions are carried out by the automatic installation routine?

Answer 21

Copy the executable program
Copy or prepare any data files
Copy any library files
Make the program easy to access by setting up icons and shortcuts
Initial configuration of user preference settings in the program