Chapter 10 (error checking)

Question 1

What is a syntax error?

Answer 1

Violating a programing languages rules on combinations of symbols and functions to create a program

Question 2

Is a syntax error found as the code is run sequentially or before the program is run?

Answer 2

Before the program is run

Question 3

How do you avoid errors in your code?

Answer 3

Frequently run it to make sure each new section of code works

Question 4

What is a runtime error?

Answer 4

When syntax is correct but an impossible operation is attempted, like dividing by 0 or change a string to an int()

Question 5

Are run time errors found during the sequential running of code or before the program is run?

Answer 5

Running the program, it results in a crash

Question 6

What is a crash?

Answer 6

An unintentional termination of code

Question 7

What is an indentation error?

Answer 7

When the code is not properly indented

Question 8

What is a value error?

Answer 8

When an invalid value is given, like a string giving to an integer variable

Question 9

What is a name error?

Answer 9

When the program tries to use a variable that does not exist

Question 10

What is a type error?

Answer 10

When an operation does not work because of the data type,
- string / string

Question 11

What is a logic error?

Answer 11

When the code isn’t incorrect but it runs incorrectly

Question 12

what is an EOFError?

Answer 12

Input( ) hits an end-of-file (EOF) condition without reading anything. The input function has no input to read

Question 13

What is a KeyError?

Answer 13

When a key isn’t found when reading a dictionary

Question 14

What is a ZeroDivisionError?

Answer 14

divide by zero error

Question 15

What is an Index Error?

Answer 15

Index out of range

Question 16

What is the try-except function used for?

Answer 16

Testing for errors without crashing the program, the functions acts similarly to an if statement

Question 17

What is the format of a multistage try-except function?

Answer 17

try:
except (error type):
except:

Question 18

What is an IO error?

Answer 18

When a file cannot be opened
- (Input/output)

Question 19

What does raise do?

Answer 19

Allows code to identify an error and exit at try block while executing an instruction:
while True:
try:
raise ValueError(‘Invalid
number’)
except ValueError as excpt:
print(excpt)
# prints ‘invalid number’
num = int(input(‘enter a number’))

Question 20

How do you check for specific error?

Answer 20

for specific errors

except ErrorType:

except:
# catches all errors

Question 21

What happens if an error is checked during a function?

Answer 21

If the exception is not found within the function, the function will go back to the caller function to look for an exception

Question 22

A raise statement in a function causes the function to return a value before exiting (T/F)?

Answer 22

False, the function is exited immediately in search for an exception instruction

Question 23

What does the finally block do in a try-except block?

Answer 23

Runs after both the try and except blocks, a final block to print/ do something for both situations

Question 24

What is hierarchical debugging?

Answer 24

Taking sections of code to debug so it is easier to pin point where the mistake is

Question 25

What is visual debugging?

Answer 25

Looking for a bug without adding any code, just looking line by line to see if there are any errors
- if the error is not found the error hypothesis is inconclusive

Question 26

What does a try statement look like?

Answer 26

try:
—-code
except:
—-code that runs if try code is an error
except exception:
—-code runs for specified error
else:
—-code runs only if no error occurred
finally:
—-always run this

Question 27

How do you run a specific code if there is no error in a try statement?

Answer 27

try:
—-code
else:
—-code

Question 28

How do you always run code after a try statement, disregarding if there was an error or not?

Answer 28

try:
—-code
except:
—-code
finally:
—-code