Python Lists Overview
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Questions and Answers

What is the purpose of the comma in a list declaration?

  • It is used to define a function in Python.
  • It is used to separate elements in a list. (correct)
  • It is used to end a statement in Python.
  • It is used to assign values to variables.

    • What is the result of the code list1[1:3] = list2 in Python?

  • It will raise an error because list1 is immutable.
  • It will replace the elements at index 1 and 2 of list1 with the elements of list2. (correct)
  • It will concatenate list1 and list2.
  • It will remove the elements at index 1 and 2 from list1.

    • What is the difference between a list and a tuple in Python?

  • A list is mutable, while a tuple is immutable. (correct)
  • A list is immutable, while a tuple is mutable.
  • A list can only hold integers, while a tuple can hold any type.
  • A list can only hold strings, while a tuple can hold any type.

    • What is the output of the code print(type(list1))?

    Signup and view all the answers

    What is the characteristic of a list in Python?

    <p>It is ordered and can be accessed via an index.</p> Signup and view all the answers

    What is the purpose of square brackets in a list declaration?

    <p>They are used to enclose the elements of a list.</p> Signup and view all the answers

    What is a major difference between a Python list and an array in C, C++, or Java?

    <p>Python lists may have objects of different data types.</p> Signup and view all the answers

    How can you access a list item in Python?

    <p>Using the square brackets with the index.</p> Signup and view all the answers

    What is the index of the last item in a Python list?

    <p>Length-1</p> Signup and view all the answers

    What is the purpose of the '+' operator when used with Python lists?

    <p>To concatenate two lists.</p> Signup and view all the answers

    What is true about a Python list?

    <p>It is an ordered collection of items.</p> Signup and view all the answers

    What is the purpose of the '*' operator when used with Python lists?

    <p>To concatenate multiple copies of a list.</p> Signup and view all the answers

    Which of the following best describes the process of list indexing in Python?

    <p>Python allows both positive and negative indices to access elements in a list.</p> Signup and view all the answers

    What will be the output of the following code: list_var = ['a', 'b', 'c', 'd', 'e']; print(list_var[1:4])?

    <p>['b', 'c', 'd']</p> Signup and view all the answers

    In Python, what is the result of 'emp = [ 'John', 102, 'USA']'?

    <p>A list containing three elements: 'John', 102, 'USA'</p> Signup and view all the answers

    What is the output of the following code in Python: print([1, 2, 3]*2)?

    <p>[1, 2, 3, 1, 2, 3]</p> Signup and view all the answers

    Considering the code snippet provided, why is 'a!=b' printed as output?

    <p>The elements inside 'a' and 'b' are different, even though they appear the same.</p> Signup and view all the answers

    When indexing into a Python list, at which index position would the first element of the list be stored?

    <p>Index 0</p> Signup and view all the answers

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