PRP201c

What is the purpose of the newline character in text files? A It allows us to open more than one files and read them in a synchronized manner B It indicates the end of one line of text and the beginning of another line of text C It enables random movement throughout the file D It adds a new network connection to retrieve files from the network

B

What will end up in the variable y after this code is executed? A 3 B 4 C A two item tuple D A dictionary with the key 3 mapped to the value 4 E A two item list

B

What will the following Python code print out? def func(x) : print(x) func(10) func(20) A x 20 B 10 20 C x x D def x func func

B

What would the following Python code print out? stuff = dict() print(stuff.get('candy',-1)) A 'candy' B -1 C 0 D The program would fail with a traceback

B

When Python is running in the interactive mode and displaying the chevron prompt (>>>) - what question is Python asking you? A What would you like to do? B What Python script would you like me to run? C What is the next machine language instruction to run? D What is your favourite color?

B

Using the following tuple, how would you print 'Wed'? days = ('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun') A print(days.get(1,-1)) B print(days{2}) C print(days[2]) D print(days[1]) E print[days(2)] F print(days(2))

C

You look at the following text: if x == 6 : print('Is 6') print('Is Still 6') print('Third 6') It looks perfect but Python is giving you an 'Indentation Error' on the second print statement. What is the most likely reason? A In order to make humans feel inadequate, Python randomly emits 'Indentation Errors' on perfectly good code - after about an hour the error will just go away without any changes to your program B Python thinks 'Still' is a mis-spelled word in the string C You have mixed tabs and spaces in the file D Python has reached its limit on the largest Python program that can be run

C

(T/F) When you add items to a dictionary they remain in the order in which you added them. A False B True

A

>>> x = 15 >>> x = x + 5 >>> print(x) A 20 B 5 C 15 D "print x" E x + 5

A

Assume the variable x has been initialized to an integer value (e.g., x = 3). What does the following statement do? x = x + 2 A Retrieve the current value for x, add two to it and put the sum back into x B Create a function called "x" and put the value 2 in the function C This would fail as it is a syntax error D Exit the program

A

For the following code, if x < 2 : print('Below 2') elif x >= 2 : print('Two or more') else : print('Something else') What value of 'x' will cause 'Something else' to print out? A This code will never print 'Something else' regardless of the value for 'x' B x = 2.0 C x = -2 D x = 2

A

Given that Python lists and Python tuples are quite similar - when might you prefer to use a tuple over a list? A For a temporary variable that you will use and discard without modifying B For a list of items that will be extended as new items are found C For a list of items you intend to sort in place D For a list of items that want to use strings as key values instead of integers

A

Given the architecture and terminology we introduced in Chapter 1, where are files stored? A Secondary memory B Motherboard C Main Memory D Central Processor

A

How would you use string slicing [:] to print out 'uct' from the following string? x = 'From [email protected]' A print(x[14:17]) B print(x[14+17]) C print(x[15:18]) D print(x[15:3]) E print(x[14/17]) G print(x[14:3]) term-54

A

In Python what is the input() feature best described as? A A built-in function B The central processing unit C A user-defined function D A reserved word

A

In the following Python code, what will end up in the variable y? A A list of tuples B A list of strings C A list of integers D A tuple with three integers

A

Question 10 Which of the following is not one of the programming patterns covered in Chapter 1? A Random steps B Sequential Steps C Conditional Steps D Repeated Steps

A

The following code sequence fails with a traceback when the user enters a file that does not exist. How would you avoid the traceback and make it so you could print out your own error message when a bad file name was entered? fname = input('Enter the file name: ') fhand = open(fname) A try / except B begin / rescue / end C setjmp / longjmp D signal handlers

A

What does the Python input() function do? A Pause the program and read data from the user B Connect to the network and retrieve a web page. C Read the memory of the running program D Take a screen shot from an area of the screen

A

What does the following Python code print out? print(len('banana')*7) A 42 B 0 C bananabananabananabananabananabananabanana D banana7

A

What is a term commonly used to describe the Python dictionary feature in other programming languages? A Associative arrays B Lambdas C Sequences D Closures

A

What is the iteration variable in the following Python code: friends = ['Joseph', 'Glenn', 'Sally'] for friend in friends : print('Happy New Year:', friend) print('Done!') A friend B Sally C Glenn D Joseph

A

What is the most important benefit of writing your own functions? A Avoiding writing the same non-trivial code more than once in your program B To avoid having more than 10 lines of sequential code without an indent or de-indent C Following the rule that no function can have more than 10 statements in it D Following the rule that whenever a program is more than 10 lines you must use a function

A

What is the purpose of the second parameter of the get() method for Python dictionaries? A To provide a default value if the key is not found B The value to retrieve C The key to retrieve D An alternate key to use if the first key cannot be found

A

What is the value of the following expression Hint - the "%" is the remainder operator 42 % 10 A 2 B 420 C 1042 D 10

A

What is true about the following code segment: if x == 5 : print('Is 5') print('Is Still 5') print('Third 5') A Depending on the value of x, either all three of the print statements will execute or none of the statements will execute B The string 'Is 5' will always print out regardless of the value for x. C The string 'Is 5' will never print out regardless of the value for x. D Only two of the three print statements will print out if the value of x is less than zero.

A

What is wrong with this Python loop: n = 5 while n > 0 : print(n) print('All done') A This loop will run forever B The print('All done') statement should be indented four spaces C There should be no colon on the while statement D while is not a Python reserved word

A

What list method adds a new item to the end of an existing list? A append() B forward() C add() D push() E pop() F index()

A

What will be the value of x after the following statement executes: x = 1 + 2 * 3 - 8 / 4 A 5.0 B 3.0 C 15 D 4

A

What will the following Python program print out? def greet(lang): if lang == 'es': return 'Hola' elif lang == 'fr': return 'Bonjour' else: return 'Hello' print(greet('fr'),'Michael') A Bonjour Michael B def Hola Bonjour Hello Michael C Hola Michael D Hola Bonjour Hello Michael

A

What will the following code print out? Hint: This is a trick question and most would say this code has a bug - so read carefully smallest_so_far = -1 for the_num in [9, 41, 12, 3, 74, 15] : if the_num < smallest_so_far : smallest_so_far = the_num print(smallest_so_far) A -1 B 74 C 42 D 3

A

What would the following Python code print out? fruit = 'Banana' fruit[0] = 'b' print(fruit) A Nothing would print - the program fails with a traceback error B B C b D [0] E banana G Banana

A

What would the following Python code print out? stuff = dict() print(stuff['candy']) A The program would fail with a traceback B candy C 0 D -1

A

Which Python keyword indicates the start of a function definition? A def B continue C sweet D help

A

Which of the following Python statements would print out the length of a list stored in the variable data? A print(len(data)) B print(data.Len) C print(data.length) D print(length(data)) E print(strlen(data)) F print(data.length())

A

Which of the following elements of a mathematical expression in Python is evaluated first? A Parentheses ( ) B Subtraction - C Addition + D Multiplication *

A

Which of the following is not a Python reserved word? A iterate B continue C else D break

A

Which of the following is not a valid string method in Python? A shout() B split() C join() D startswith()

A

Which of the following variables is the "most mnemonic"? A hours B x1q3z9ocd C x D variable_173

A

Which of these words is a reserved word in Python ? A for B names C pizza D payroll

A

How would you use the index operator [] to print out the letter q from the following string? x = 'From [email protected]' A print(x[7]) B print(x[8]) C print x[-1] D print(x[9]) E print(x[q])

B

If we open a file as follows: xfile = open('mbox.txt') What statement would we use to read the file one line at a time? A READ xfile INTO LINE B for line in xfile: C while ((line = xfile.readLine()) != null) { D while (<xfile>) {

B

If you write a Python program to read a text file and you see extra blank lines in the output that are not present in the file input as shown below, what Python string function will likely solve the problem? From: [email protected] From: [email protected] From: [email protected] From: [email protected] ... A ljust() B rstrip() C startswith() D trim()

B

In Python, how do you indicate the end of the block of code that makes up the function? A You put the "END" keyword in column 7 of the line which is to be the last line of the function B You de-indent a line of code to the same indent level as the def keyword C You add the matching curly brace that was used to start the function } D You put a # character at the end of the last line of the function

B

In the following Python loop, why are there two iteration variables (k and v)? c = {'a':10, 'b':1, 'c':22} for k, v in c.items() : ... A Because the keys for the dictionary are strings B Because the items() method in dictionaries returns a list of tuples C Because for each item we want the previous and current key D Because there are two items in the dictionary

B

In the following code (numbers added) - which will be the last line to execute successfully? (1) astr = 'Hello Bob' (2) istr = int(astr) (3) print('First', istr) (4) astr = '123' (5) istr = int(astr) (6) print('Second', istr) A 6 B 1 C 2 D 5

B

What do we do to a Python statement that is immediately after an if statement to indicate that the statement is to be executed only when the if statement is true? A Underline all of the conditional code B Indent the line below the if statement C Begin the statement with a curly brace { D Start the statement with a "#" character

B

What do we use the second parameter of the open() call to indicate? A The list of folders to be searched to find the file we want to open B Whether we want to read data from the file or write data to the file C How large we expect the file to be D What disk drive the file is stored on

B

What does the break statement do? A Jumps to the "top" of the loop and starts the next iteration B Exits the currently executing loop C Exits the program D Resets the iteration variable to its initial value

B

What does the following code print out? def thing(): print('Hello') print('There') A thing Hello There B There C Hello D def thing

B

What does the following code print out? print("123" + "abc") A This is a syntax error because you cannot add strings B 123abc C 123+abc D hello world

B

What is "code" in the context of this course? A A password we use to unlock Python features B A sequence of instructions in a programming language C A set of rules that govern the style of programs D A way to encrypt data during World War II

B

What is stored in a "file handle" that is returned from a successful open() call? A The handle has a list of all of the files in a particular folder on the hard drive B The handle is a connection to the file's data C The handle contains the first 10 lines of a file D All the data from the file is read into memory and stored in the handle

B

When you have multiple lines in an if block, how do you indicate the end of the if block? A You put the colon : character on a line by itself to indicate we are done with the if block B You de-indent the next line past the if block to the same level of indent as the original if statement C You omit the semicolon ; on the last line of the if block D You use a curly brace { after the last line of the if block

B

Which method in a dictionary object gives you a list of the values in the dictionary? A each() B values() C keys() D items() E all()

B

Which of the following lines of Python is equivalent to the following sequence of statements assuming that counts is a dictionary? if key in counts: counts[key] = counts[key] + 1 else: counts[key] = 1 A counts[key] = key + 1 B counts[key] = counts.get(key,0) + 1 C counts[key] = counts.get(key,-1) + 1 D counts[key] = (counts[key] * 1) + 1 E counts[key] = (key in counts) + 1

B

Which of the following string methods removes whitespace from both the beginning and end of a string? A strtrunc() B strip() C split() D wsrem()

B

Which of the following tuples is greater than x in the following Python sequence? x = (5, 1, 3) if ??? > x : ... A (5, 0, 300) B (6, 0, 0) C (4, 100, 200) D (0, 1000, 2000)

B

Which reserved word indicates the start of an "indefinite" loop in Python? A indef B while C for D def E break

B

A USB memory stick is an example of which of the following components of computer architecture? A Main Memory B Central Processing Unit C Secondary Memory D Output Device

C

For the following code: astr = 'Hello Bob' istr = 0 try: istr = int(astr) except: istr = -1 What will the value be for istr after this code executes? A The istr variable will not have a value B 0 C -1 D It will be the 'Not a number' value (i.e. NaN)

C

For the following list, how would you print out 'Sally'? friends = [ 'Joseph', 'Glenn', 'Sally' ] A print friends[3] B print(friends[2:1]) C print(friends[2]) D print(friends['Sally'])

C

How are "collection" variables different from normal variables? A Collection variables pull multiple network documents together B Collection variables merge streams of output into a single stream C Collection variables can store multiple values in a single variable D Collection variables can only store a single value

C

How many times will the body of the following loop be executed? n = 0 while n > 0 : print('Lather') print('Rinse') print('Dry off!') A 5 B 1 C 0 D This is an infinite loop

C

In the following Python code, which of the following is an "argument" to a function? x = 'banana' y = max(x) print(y) A 'banana' B max C x D print

C

What does the continue statement do? A Resets the iteration variable to its initial value B Exits the currently executing loop C Jumps to the "top" of the loop and starts the next iteration D Exits the program

C

What does the following Python code print out? (Note that this is a bit of a trick question and the code has what many would consider to be a flaw/bug - so read carefully). def addtwo(a, b): added = a + b return a x = addtwo(2, 7) print(x) A Traceback B 7 C 2 D 14

C

What does the following Python program print out? x = '40' y = int(x) + 2 print(y) A 402 B x2 C 42 D int402

C

What is the best way to think about a "Syntax Error" while programming? A The computer is overheating and just wants you to stop to let it cool down B The computer has used GPS to find your location and hates everyone from your town C The computer did not understand the statement that you entered D The computer needs to have its software upgraded

C

What is the difference between a Python tuple and Python list? A Tuples can be expanded after they are created and lists cannot B Lists are indexed by integers and tuples are indexed by strings C Lists are mutable and tuples are not mutable D Lists maintain the order of the items and tuples do not maintain order

C

What is the purpose of the following Python code? fhand = open('mbox.txt') x = 0 for line in fhand: x = x + 1 print(x) A Convert the lines in mbox.txt to lower case B Reverse the order of the lines in mbox.txt C Count the lines in the file 'mbox.txt' D Remove the leading and trailing spaces from each line in mbox.txt

C

What will the following code print out? x = 0 if x < 2 : print('Small') elif x < 10 : print('Medium') else : print('LARGE') print('All done') A Small Medium LARGE All done B Small C Small All done D Medium All done

C

How are Python dictionaries different from Python lists? A Python lists can store strings and dictionaries can only store words B Python dictionaries are a collection and lists are not a collection C Python lists store multiple values and dictionaries store a single value D Python lists are indexed using integers and dictionaries can use strings as indexes

D

How would you print out the following variable in all upper case in Python? greet = 'Hello Bob' A print(greet.toUpperCase()); B puts(greet.ucase); C print(uc($greet)); D print(greet.upper())

D

If the variable data is a Python list, how do we sort it in reverse order? A data = data.sort(-1) B data.sort.reverse() C data = sortrev(data) D data.sort(reverse=True)

D

In the following Python, what does the for loop iterate through? x = dict() ... for y in x : ... A It loops through all of the dictionaries in the program B It loops through the values in the dictionary C It loops through the integers in the range from zero through the length of the dictionary D It loops through the keys in the dictionary

D

In the following code, print(98.6) What is "98.6"? A A variable B An iteration / loop statement C A conditional statement D A constant screen

D

Python scripts (files) have names that end with: A .png B .exe C .doc D .py

D

What Python function would you use if you wanted to prompt the user for a file name to open? A gets() B alert() C file_input() D input()

D

What are the Python keywords used to construct a loop to iterate through a list? A foreach / in B try / except C def / return D for / in

D

What does the following Python code accomplish, assuming the c is a non-empty dictionary? tmp = list() for k, v in c.items() : tmp.append( (v, k) ) A It computes the average of all of the values in the dictionary B It computes the largest of all of the values in the dictionary C It sorts the dictionary based on its key values D It creates a list of tuples where each tuple is a value, key pair

D

What does the following Python code do? fhand = open('mbox-short.txt') inp = fhand.read() A Checks to see if the file exists and can be written B Prompts the user for a file name C Turns the text in the file into a graphic image like a PNG or JPG D Reads the entire file into the variable inp as a string

D

What does the following Python program print out? tot = 0 for i in [5, 4, 3, 2, 1] : tot = tot + 1 print(tot) A 10 B 15 C 0 D 5

D

What is a common use of Python dictionaries in a program? A Computing an average of a set of numbers B Sorting a list of names into alphabetical order C Splitting a line of input into words using a space as a delimiter D Building a histogram counting the occurrences of various strings in a file

D

What is a good description of the following bit of Python code? zork = 0 for thing in [9, 41, 12, 3, 74, 15] : zork = zork + thing print('After', zork) A Compute the average of the elements in a list B Count all of the elements in a list C Find the smallest item in a list D Sum all the elements of a list

D

What is a good statement to describe the is operator as used in the following if statement: if smallest is None : smallest = value A Is true if the smallest variable has a value of -1 B Looks up 'None' in the smallest variable if it is a string C The if statement is a syntax error D matches both type and value

D

What is the Python reserved word that we use in two-way if tests to indicate the block of code that is to be executed if the logical test is false? A toggle B iterate C otherwise D else

D

What is the iteration variable in the following Python code? for letter in 'banana' : print(letter) A in B for C 'banana' D letter E print

D

What is the proper way to say "good-bye" to Python? A // stop B while C #EXIT D quit()

D

What will be the value of x when the following statement is executed: x = int(98.6) A 6 B 99 C 100 D 98

D

What will the following Python code print out? data = 'From [email protected] Sat Jan 5 09:14:16 2008' pos = data.find('.') print(data[pos:pos+3]) A Sat B mar C uct D .ma

D

What will the following Python code print out? friends = [ 'Joseph', 'Glenn', 'Sally' ] friends.sort() print(friends[0]) A friends B Sally C Joseph D Glenn

D

Which of the following slicing operations will produce the list [12, 3]? t = [9, 41, 12, 3, 74, 15] A t[:] B t[12:3] C t[1:3] D t[2:4] E t[2:2]

D

Which of the parts of a computer actually executes the program instructions? A Secondary Memory B Input/Output Devices C Main Memory D Central Processing Unit

D

Which of these operators is not a comparison / logical operator? A >= B < C == D = E !=

D

What does the following Python Program print out? str1 = "Hello" str2 = 'there' bob = str1 + str2 print(bob) A Hello B Hello there C Hello D there E Hellothere

E

What type of data is produced when you call the range() function? x = list(range(5)) A A string B A list of words C A list of characters D A boolean (true/false) value E A list of integers

E

Which line of the following Python program will never execute? def stuff(): print('Hello') return print('World') stuff() A return B def stuff(): C stuff() D print('Hello') E print ('World')

E

Which of the following methods work both in Python lists and Python tuples? A reverse() B append() C pop() D sort() E index()

E

What does the following Python code print out? a = [1, 2, 3] b = [4, 5, 6] c = a + b print(len(c)) A [4, 5, 6] B [1, 2, 3] C [1, 2, 3, 4, 5, 6] D 21 E 15 F 6

F