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CS Olympiad Python Strings Lists and Tuples — practice questions

Explore 30 free Python Strings Lists and Tuples questions in CS Olympiad Computer Science. Open each question or exercise to read its content, reference answers and available explanation.

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Python Strings Lists and Tuples questions and exercises with answers

Showing questions 1–30 of 30.

A learner asks what a Python string really is. It is a sequence of zero or more:Read the answer and worked solution →In the Python string 'HELLO', the index of the letter H is:Read the answer and worked solution →Counting from the right hand end of a Python string, the last character has index:Read the answer and worked solution →The international standard Python uses for representing text is:Read the answer and worked solution →The unique number Unicode gives to each possible character is called a:Read the answer and worked solution →The built in function that converts a character into its code point is:Read the answer and worked solution →The built in function that converts a code point back into a character is:Read the answer and worked solution →Unicode was built as an extension of an older standard known as:Read the answer and worked solution →The original ASCII standard defined how many code points?Read the answer and worked solution →A backslash used inside a string to stand for a special character starts an:Read the answer and worked solution →Julius Caesar shifted each letter of a message by three. Such a method is a:Read the answer and worked solution →A string literal prefixed with the letter f, allowing values inside braces, is an:Read the answer and worked solution →Inside an f string, an expression written in curly braces is called a:Read the answer and worked solution →In the f string with minute:02d, the part written after the colon is a:Read the answer and worked solution →In Python, the statement message = 'Hello' makes the variable message:Read the answer and worked solution →The unique integer tied to an object, usually its memory location, is its:Read the answer and worked solution →The built in function that reports what kind of object a value is:Read the answer and worked solution →A Python list is written using comma separated values enclosed in:Read the answer and worked solution →A Python list has 50 elements. The index of its last element is:Read the answer and worked solution →The built in function that returns how many elements a list holds is:Read the answer and worked solution →An object that cannot be changed after it is created is described as:Read the answer and worked solution →A programmer needs a fixed sequence of constants that no code can alter. He should use a:Read the answer and worked solution →Catch the built in functionsRead the answer and worked solution →Pop the sequence typesRead the answer and worked solution →Run the Python gatesRead the answer and worked solution →Slice the Python termsRead the answer and worked solution →Mutable or notRead the answer and worked solution →Sort the Python ideasRead the answer and worked solution →Type the numberRead the answer and worked solution →Python bingoRead the answer and worked solution →

Worked practice questions

A learner asks what a Python string really is. It is a sequence of zero or more:

  1. Characters
  2. Statements
  3. Parameters
  4. Expressions
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Correct answer: A. Characters

1. A string holds text of any length, even nothing. 2. The pieces it holds are single letters, digits or symbols. 3. So a string is a sequence of characters. _Source: OpenStax Introduction to Python Programming, Chapter 3._

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In the Python string 'HELLO', the index of the letter H is:

  1. 5
  2. 0
  3. 1
  4. 2
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Correct answer: B. 0

1. Indexes run left to right from a fixed start. 2. Python starts counting at zero. 3. So the index of H is 0. _Source: OpenStax Introduction to Python Programming, Chapter 3._

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Counting from the right hand end of a Python string, the last character has index:

  1. -1
  2. -0
  3. -2
  4. -9
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Correct answer: A. -1

1. Negative indexes count from the right. 2. They start at minus one, not minus zero. 3. So the last character is at -1. _Source: OpenStax Introduction to Python Programming, Chapter 3._

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