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when using regular expressions, which of the following expressions uses a reserved character that can represent any single character?

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** 1- Which of the following best describes "Regular Expressions"?**

1) A small programming language unto itself

2) A way to solve Algebra formulas for the unknown value

3) The way Python handles and recovers from errors that would otherwise cause a traceback

4) A way to calculate mathematical values paying attention to operator precedence

Answer is 1) A small programming language unto itself

** 2- Which of the following is the way we match the "start of a line" in a regular expression?**

1) ^ 2) str.startswith() 3) \linestart

4) String.startsWith()

5) variable[0:1] Answer is 1) ^

** 3- What would the following mean in a regular expression? [a-z0-9]**

1) Match any number of lowercase letters followed by any number of digits

2) Match a lowercase letter or a digit

3) Match an entire line as long as it is lowercase letters or digits

4) Match any text that is surrounded by square braces

5) Match anything but a lowercase letter or digit

Answer is 2) Match a lowercase letter or a digit

** 4- What is the type of the return value of the re.findall() method?

1) A list of strings

2) An integer 3) A boolean

4) A single character

5) A string

Answer is 1) A list of strings

** 5- What is the "wild card" character in a regular expression (i.e., the character that matches any character)?**

1) . 2) * 3) $ 4) ^ 5) + 6) ? Answer is 1) .

** 6- What is the difference between the "+" and "*" character in regular expressions?**

1) The "+" matches at least one character and the "*" matches zero or more characters

2) The "+" matches upper case characters and the "*" matches lowercase characters

3) The "+" matches the beginning of a line and the "*" matches the end of a line

4) The "+" matches the actual plus character and the "*" matches any character

5) The "+" indicates "start of extraction" and the "*" indicates the "end of extraction"

Answer is 1) The "+" matches at least one character and the "*" matches zero or more characters

** 7- What does the "[0-9]+" match in a regular expression?**

1) Several digits followed by a plus sign

2) Any number of digits at the beginning of a line

3) Any mathematical expression

4) Zero or more digits

5) One or more digits

Answer is 5) One or more digits

** 8- What does the following Python sequence print out?**

x = 'From: Using the : character'

y = re.findall('^F.+:', x)

print(y) 1) : 2) ^F.+: 4) ['From:'] 5) From:

6) ['From: Using the :']

Answer is 6) ['From: Using the :']

** 9- What character do you add to the "+" or "*" to indicate that the match is to be done in a non-greedy manner?**

1) \g 2) ** 3) ++ 4) $ 5) ? 6) ^ Answer is 5) ?

** 10- Given the following line of text:**

From [email protected] Sat Jan 5 09:14:16 2008

What would the regular expression '\[email protected]\S+' match?

1) [email protected] 2) \@\ 3) From 4) [email protected]

5) [email protected]

Answer is 5) [email protected]

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Week 3 Practice Quiz: Regular Expressions

Question 1- hen using regular expressions, which of the following expressions uses a reserved character that can represent any single character?

Week 3 Practice Quiz: Regular Expressions

Home TopicsWeek 3 Practice Quiz: Regular Expressions

Home › Forums › Assignment courserra › Google IT in Automation with Python Professional Certificate › Using Python to interact with the operating system › Week 3 Practice Quiz: Regular Expressions

Tagged: Coursera, Crash Course, Google, Google IT Automation, Python, Using Python to Interact with the Operating System

This topic has 0 replies, 1 voice, and was last updated 2 years, 6 months ago by Abhishek Tyagi.

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August 27, 2020 at 9:58 pm

#1229 Abhishek Tyagi Keymaster

Question 1- hen using regular expressions, which of the following expressions uses a reserved character that can represent any single character?

Answer-

re.findall(f.n, text)

The dot (.) represents any single character.

Question 2- Which of the following is NOT a function of the Python regex module?

Answer-

re.grep()

Question 3- The circumflex [^] and the dollar sign [$] are anchor characters. What do these anchor characters do in regex?

Answer-

Match the start and end of a line

Question 4- When using regex, some characters represent particular types of characters. Some examples are the dollar sign, the circumflex, and the dot wildcard. What are these characters collectively known as?

Answer-

Special Characters

Question 5- What is grep?

Answer-

A command-line regex tool

This topic was modified 2 years, 6 months ago by Abhishek Tyagi.

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Assignment courserra

Assignment NPTEL_ Cody Bank CS 50

WEEK 3:: PYTHON AUTOMATION REGEX(REGULAR EXPRESSION) Flashcards

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