Programming Techniques: Arrays and Variables

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Questions and Answers

Which syntax correctly defines an array with the integers 1, 2, and 3?

array = [1, 2, 3] (correct)

array {1, 2, 3}

array = <1, 2, 3>

array: (1, 2, 3)

In most programming languages, the index of the first element in an array is one.

False

What is the purpose of the pop() function in relation to arrays?

To remove elements from an array.

An array where the index starts at one is known as a ______ array.

one-indexed Signup and view all the answers

Match the following array definitions with their characteristics:

Zero-indexed array = Index starts at zero One-indexed array = Index starts at one Pop function = Removes the last element from the array Empty array = Contains no elements Signup and view all the answers

What will happen when the line 'highscores = 8' is executed in the program 'highscores = [125,63,35,12]'?

It will produce an error message. Signup and view all the answers

The append() function is used to add multiple elements to an array.

False Signup and view all the answers

What is the purpose of the extend() function in arrays?

To add multiple elements to the end of an array. Signup and view all the answers

The function used to remove the last item from an array is called ______.

pop Signup and view all the answers

Match the following array functions with their purposes:

Append() = Add a single element to the end of the array Extend() = Add multiple elements to the end of the array Remove() = Delete a specific element from the array Clear() = Remove all elements from the array Signup and view all the answers

What would be the output of printing the array 'highscores' using the print function directly?

[125, 63, 35, 12] Signup and view all the answers

Using an asterisk (*) before the array name in the print function will display the elements in a list format.

False Signup and view all the answers

How can the elements of an array be printed each on a new line?

By using print(*array_name, sep='\n') Signup and view all the answers

To print the elements of an array without brackets and commas, you can use an asterisk () before the name of the array, like this: print(______).

array_name Signup and view all the answers

Match the printing method with its description:

print(highscores) = Prints elements with brackets and commas print(*highscores) = Prints elements without brackets and commas print(*highscores, sep='\n') = Prints each element on a new line for element in highscores: print(element) = Prints each element in a loop Signup and view all the answers

Which programming construct allows for repeating a block of code based on a condition?

Iteration Signup and view all the answers

An array can only hold a single type of data.

False Signup and view all the answers

What function in programming can be used to count the number of elements in an array?

len() Signup and view all the answers

To create an array, the identifier is followed by the equals symbol and then open and closed ______.

square brackets Signup and view all the answers

Match the programming constructs with their descriptions:

Sequence = Executes instructions in the order they are written Selection = Chooses between different paths based on conditions Iteration = Repeats a block of code multiple times based on criteria Signup and view all the answers

What is the purpose of slicing an array?

To access a subset of elements from an array Signup and view all the answers

In an array, each value is referred to as an element.

True Signup and view all the answers

What is the difference between a variable and an array?

A variable stores one value, while an array stores multiple values under a single name. Signup and view all the answers

The len() function can be used to remove elements from an array.

False Signup and view all the answers

What is the syntax for using the slice function?

array_name[slice(start, stop, step)] Signup and view all the answers

The function _______ sorts the elements of an array into ascending order.

sort() Signup and view all the answers

Match the following array functions with their descriptions:

reverse() = Reverses the elements in an array sort() = Sorts an array into ascending order count() = Returns the number of occurrences of a specific element clear() = Removes all elements from an array Signup and view all the answers

What will the following code output: print(len([10, 20, 30, 40]))?

4 Signup and view all the answers

The slice() function modifies the original array.

False Signup and view all the answers

How many elements are removed from the array using the clear() function?

All elements Signup and view all the answers

What does the function max() do?

Returns the maximum value in the array. Signup and view all the answers

User input cannot be used in array functions like append or insert.

False Signup and view all the answers

What does the remove() function do when used with an array?

It removes the specified element from the array. Signup and view all the answers

The function min() is used to return the ______ value in the array.

minimum Signup and view all the answers

Match the following functions to their descriptions:

min() = Returns the minimum value in the array. max() = Returns the maximum value in the array. remove() = Removes a specified element from the array. append() = Adds an element to the end of the array. Signup and view all the answers

In the provided example, what input is expected from the user when removing a highscore?

The score to be removed. Signup and view all the answers

The method ages.append(5) always appends the value 5 to the ages array regardless of user input.

True Signup and view all the answers

To append a user inputted value to an array, you would use the syntax ______(choice).

append() Signup and view all the answers

Study Notes