Exercise: Python

Questions for: Arrays

In Python, which module is commonly used for array operations?
A:
list
B:
array
C:
numpy
D:
math
Answer: C
The numpy module is commonly used for efficient array operations in Python.
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What will be the output of the following code snippet? 
fruits = ['apple', 'banana', 'cherry']
fruits.remove('banana')
print(fruits)
A:
['apple', 'banana', 'cherry']
B:
['apple', 'cherry']
C:
['banana', 'cherry']
D:
Error
Answer: B
The remove() method is used to remove a specific element from the list. 
fruits = ['apple', 'banana', 'cherry']
fruits.remove('banana')
print(fruits)
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What will be the output of the following code snippet? 
numbers = [1, 2, 3, 4, 5]
sliced_numbers = numbers[1:4]
print(sliced_numbers)
A:
[1, 2, 3, 4, 5]
B:
[2, 3, 4]
C:
[1, 2, 3]
D:
[3, 4, 5]
Answer: B
Slicing is used to extract a portion of a list. In this case, it extracts elements from index 1 to 3. 
numbers = [1, 2, 3, 4, 5]
sliced_numbers = numbers[1:4]
print(sliced_numbers)
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What will be the output of the following code snippet? 
numbers = [1, 2, 3, 4, 5]
numbers[1] = 9
print(numbers)
A:
[1, 9, 3, 4, 5]
B:
[1, 2, 3, 4, 5]
C:
[9, 2, 3, 4, 5]
D:
Error
Answer: A
Lists in Python are mutable, so you can change the value of an element using indexing.
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What will be the output of the C#.NET code snippet given below? 
namespace ExamAdept
{
    class SampleProgram
    {
        static void Main(string[ ] args)
        {
            int i, j;
            int[ , ] arr = new int[ 2, 2 ];
            for(i = 0; i < 2; ++i)
            {
                for(j = 0; j < 2; ++j)
                {
                    arr[i, j] = i * 17 + i * 17;
                    Console.Write(arr[ i, j ] + " ");
                }
            }
        }
    }
}
A:
0 0 34 34
B:
0 0 17 17
C:
0 0 0 0
D:
17 17 0 0
Answer: A
No answer description is available. Let's discuss.
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