Python Certification

An operator able to check whether two values are not equal is coded as

!=

an operator able to check whether two values are not equal is coded as

!=

what is the output of the following snippet? def fun (x,y,z): return x+ 2 * y +3 *z print (fun(0, z=1, y=3))

0

what is the output of the following snippet? my_list= [ 0, 1, 2, 3] x=1 for element in my_list: x*= elem print(x)

0

What is the output of the following snippet if the user enters two lines containing 11 and 4 respectively? x= int(input() ) y= int (input() ) x= x% y x= x% y y= y%x print(y)

1

what is the output of the following code? my_list= [3 ,1, -2] print(my_list[my_list [-1] ])

1

What is the output of the following snippet? z = y= x= 1 print( x, y, z, sep='*')

1 * 1 * 1

what will be the output of the following snippet? a= 1 b= 0 a= a^b b= a^ b a= a^b print (alb)

11

what is the output of the following piece of code? x=1 y=2 x,y,z= x,x,y z,y,z= x,y,z print(x,y,z)

121

What is the output of the following snippet? x= 1/2+3//3+4**2 print(x)

17.5

what is the output of the following snippet? a=1 b=0 c= a& b d= a | b e= a^b print (c+d+e)

2

what is the output of the following snippet? my_list= [1,2,3,4] print(my_list[-3:-2])

2

what is the output of the following snippet? tup= (1,2,4,8) tup = tup[1:-1] tup= tup(0) print(tup)

2

What is the output of the following snippet? x=1 y=2 z=x x=y y=z

2 1

The value twenty point twelve times ten raised to the power of eight should be written as

20.12E8

what is the output of the following snippet? dct= {} dct['1'] = (1,2) dct['2']= (2,1) for x in dct.keys(): print (dct[x][1], end= "")

21

What is the output of the following snippet if the user enters two lines containing 2 and 4 respectively? x= input() y= input() print( x + y)

24 BECAUSE STRINGS

what is the output of the following snippet? def fun(inp=2, out=3) return inp* out print(fun(out=2))

4

what is the output of the following snippet? def fun(inp=2, out=3): return inp * out print (fun ( out=2))

4

what is the output of the following snippet? def fun(x): global y y= x* x return y fun(2) print(y)

4

what is the output of the following snippet? def fun(x): x+=1 return x x=2 x= fun(x+1 ) print(x)

4

what is the output of the following snippet? tup = (1, ) + (1, ) tup = tup+ tup print(len(tup))

4

what is the output of the following snippet if the user enters two lines containing 2 and 4 respectively? x= int(input()) y=int(input()) print(x+y)

6

what is the output of the following snippet? def f(x): if x==0: return 0 return x+ f(x-1) print(f(3))

6

An operator able to check whether two values are equal is coded

==

What is IDLE?

An acronym that stands for Integrated Development and Learning Environment for Python

A built in function is a function which

Comes with Python, and is an integral part of Python

What is the output of the following snippet if the user enters two lines containing 3 and 6 respectively? x= input() y= int(input()) print(x * y)

Error

How did Python, the programming language, get its name?

Guido van Rossum named it to honor Monty Python's Flying Circus, a BBC comedy series popular in the 1970s

Select the true statements about the try except block in relation to the example

If you suspect that a snippet may raise an exception, you should place it in the try block; the code that follows the except statement will be executed if the code in the try clause runs into an error

what is the output of the following snippet? def fun(x): if x%2==0: return 1 else: return print(fun(fun(2)) +1)

None

What Python version is covered in this course?

Python 3

What is CPython?

The default implementation of the Python programming language

Which of the following statements are true?

The right argument of the % operator cannot be zero; the ** operator uses right-sided binding

the value eventually assigned to x is equal to: x=1 x= x==x

True

will value will be assigned to the x variable? z= 10 y= 0 x= z>y or z==y

True

Which of the following variable names are illegal?

True and

lists do not support del ex) del my_list[3]

TypeError 'function' object does not support Type deletion

try: value= input( "Enter a value: ") print(value/value) except Value Error: print("Bad input...") except ZeroDivision Error: print("Very bad input...") except TypeError: print("Very very bad input...") except: print("Booo!")

Very very bad input...

What is the output of the following code? my_list= [3,1,-1] my_list[-1]= my_list [-2] print(my_list)

[ 3, 1, 1 ]

the None keyword designates

a None value

What do you call a computer program which directly executes instructions written in a programming language?

a compiler

What do you call a tool that lets you launch your code step-by-step and inspect it at each moment of execution?

a debugger

The 0x prefix means that the number after it is denoted as:

a hexadecimal

Python is an example of:

a high-level programming language

What is source code?

a program written in a high-level programming language

a value returned by the input() function is:

a string

A complete set of known commands is called:

an instruction list

the print() function can output values of

any number of arguments (including zero)

The \n digraph forces the print() function to:

break the output line

a keyword is a word that:

cannot be used as a function name, cannot be used as a variable name

The escapee character owes its name to the fact that it:

changes the meaning of the character next to it

A function definition starts with the keyword

def

which of the following lines properly starts a parameterless function definition?

def fun():

which of the following lines properly starts a function using two parameters, both with zeroed default values?

def fun(a=0, b=0):

del tuple

del will delete the entire tuple

vals = [0, 1, 2] vals[0] , vals[1] = vals[1], vals[2]

doesn't change the list's length

end= ""

end character needs to be identified from white space, not new line

which of the following snippets shows the correct way of handling multiple exceptions in a single except clause?

except (TypeError, ValueError, ZeroDivision Error):

Right sided binding means that the following expression: 1**2**3 will be evaluated

from right to left

The result of the following addition: 123 + 0.0

is equal to 123.0

assuming that my_tuple is a correctly created tuple, the fact that tuples are immutable means that the following instruction: my_tuple[1] = my_tuple [1] + my_tuple[0]

is illegal

the meaning of a positional argument is determined by

its position within the argument list

a variable defined outside a function

may be read, but not written

Only one of the following statements is true: which one?

multiplication precedes addition

a function defined in the following way: def function (x=0): return x

must be invoked without any argument ;may be invoked without any argument

a function definition

must be placed before the first invocation

take a look at the snippet and choose one of the following statements which is true: nums= [ ] vals= nums vals.append(1)

nums and vals are of the same length

which of the following sentences are true? nums= [1,2,3] vals= nums[-1:-2]

nums and vals are two different lists, nums is longer than vals

choose the true statement nums= [1,2,3] vals= nums del vals[:]

nums and vals have the same length

The 0o prefix means that the number after it is denoted as:

octal

how many stars will the following snippet send to the console? I= 0 while I <=5: I += 1 if I %2==0: break print("*" )

one

a function parameter is a kind of variable accessible

only inside the function

my_list= ['mary', 'had', 'a', 'little', 'lamb'] def my_list (my_list): del my_list[3] my_list[3]= 'ram' print(my_list(my_list))

output is erroneous

The ** operator:

performs exponentiation

The // operator

performs integer division

The meaning of the positional parameter is determined by its:

position

a way of passing arguments in which the order of the arguments determines the initial parameters' value is referred to as

positional

dictionary= {} my_list= ['a', 'b', 'c', 'd'] for i in range(len(my_list)-1 ): dictionary [my_list[i]]= (my_list[i], ) for i in sorted (dictionary.keys()): k= dictionary [i]

print(k[0])

Which of the following is an example of a Python file extension?

py

which of the following statements are true?

the None value can be compared with variables; the None value can be assigned to variables

The meaning of the keyword parameter is determined by:

the argument's name specified along with its value

What is the output of the following snippet if the user enters two lines containing 2 and 4 respectively? x= int(input() ) y= int(input() ) x= x//y y= y//x print(y)

the code will cause a runtime error

what is the expected behavior of the following program is the user enters 0? value= input( "Enter a value: ") print(10/value)

the program will raise a TypeError exception

which of the following statements are true?

the return keyword may cause the function to return a value; the return keyword forces the function's execution to terminate

What is the output of the following snippet? y= 2 + 3 *5. print(Y)

the snipped will cause an execution error

what is the output of the following snippet? def fun (in=2, out=3): return in * out print(fun(3))

the snippet is erroneous (invalid syntax)

what is the result of the following snippet? my_list= [[ 0,1,2,3] for I in range(2)] print(my_list [2][0])

the snippet will cause a runtime error

The most important difference between integer and floating-point numbers lies in the fact that:

they are stored differently in the computer memory

the fact that types belong to sequence types means that

they can be indexed and sliced like lists

how many elements does my_list contain? my_list = [ I for I in range(-1,2)]

three

How many stars will the following snippet send to the console? I = 2 while I>=0: print("*") I - = 2

two

how many elements does the my_list list contain? my_list= [0 for I in range (1,3) ]

two

how many hashes will the following snippet send to the console? for I in range (-1,1): print ('#')

two

what is the output of the following snippet? dictionary= {'one': 'two', 'three' : 'one', 'two': 'three'} v=dictionary['one'] for k in range(len(dictionary)): v= dictionary[v] print(v)

two

take a look at the snippet and choose one of the following statements which is true: nums= [ ] vals= nums [: ] vals.append(1)

vals is longer than nums

if a list is passed into a function as an argument, deleting any of its elements inside the function using the del instruction

will affect the argument

the following snippet: def func_1 (a): return a**a def func_2 (a): return func_1(a) * func_1(a) print(func_2(2))

will output 16

how many elements does the lst list contain? lst= [I for I in range (-1,-2)]

zero