Tag: python

Questions Related to python

numbers= [1,2,3,4] numbers.append([5,6,7,8]) print len(numbers)
python

  1. 4

  2. 5

  3. 8

  4. 12

  5. An exception is thrown

Show answer
Correct Option: B
Explanation:

To solve this question, the user needs to know the basic syntax of Python and the behavior of the append() method.

The given code creates a list named numbers containing the integers 1, 2, 3, and 4. The append() method is then called on the numbers list, with the argument [5, 6, 7, 8]. This will add the entire list [5, 6, 7, 8] as a single element at the end of the numbers list.

So, after the append() operation, the numbers list will contain 5 elements: [1, 2, 3, 4, [5, 6, 7, 8]]. Finally, len(numbers) is called to get the length of the list, which is 5.

Therefore, the answer is:

The Answer is: B. 5

for i in range(2): print i for i in range(4,6): print i
python

  1. 2, 4, 6

  2. 0, 1, 2, 4, 5, 6

  3. 0, 1, 4, 5

  4. 0, 1, 4, 5, 6, 7, 8, 9

  5. 1, 2, 4, 5, 6

Show answer
Correct Option: C
Explanation:

Explanation: Let's go through each line of code step by step:

  1. for i in range(2): This will iterate over the values 0 and 1, because range(2) generates a sequence of numbers starting from 0 and ending at 2 (exclusive). Therefore, the output of this loop will be 0, 1.

  2. print i This will print the value of i in each iteration of the loop. In this case, it will print 0 and 1 on separate lines.

  3. for i in range(4, 6): This will iterate over the values 4 and 5, because range(4, 6) generates a sequence of numbers starting from 4 and ending at 6 (exclusive). Therefore, the output of this loop will be 4, 5.

  4. print i This will print the value of i in each iteration of the loop. In this case, it will print 4 and 5 on separate lines.

Putting it all together, the final output will be:

0
1
4
5

Option C) 0, 1, 4, 5 is the correct answer because it matches the output of the code.

foo = {1:'1', 2:'2', 3:'3'} del foo[1] foo[1] = '10' del foo[2] print len(foo)

python

  1. 2

  2. 7

  3. 3

  4. 4

  5. An exception is thrown

Show answer
Correct Option: A

Which of the following data structures can be used with the "in" operator to check if an item is in the data structure?

python

  1. List

  2. Set

  3. Dictionary

  4. None of the above

  5. All of the above

Show answer
Correct Option: E

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) List - This option is correct because the "in" operator can be used with a list to check if an item is present in the list. The "in" operator returns True if the item is in the list, and False otherwise.

Option B) Set - This option is correct because the "in" operator can also be used with a set to check if an item is present in the set. Similar to a list, the "in" operator returns True if the item is in the set, and False otherwise.

Option C) Dictionary - This option is correct because the "in" operator can be used with a dictionary to check if a key is present in the dictionary. The "in" operator checks if the specified key is one of the keys in the dictionary and returns True if it is, and False otherwise.

Option D) None of the above - This option is incorrect because both lists, sets, and dictionaries can be used with the "in" operator to check if an item is in the data structure.

Option E) All of the above - This option is correct because all of the data structures mentioned (list, set, and dictionary) can be used with the "in" operator to check if an item is in the data structure.

Therefore, the correct answer is E) All of the above.

my_tuple = (1, 2, 3, 4) my_tuple.append( (5, 6, 7) ) print len(my_tuple)

python

  1. 1

  2. 6

  3. 4

  4. 5

  5. An exception is thrown

Show answer
Correct Option: D

print type([1,2]).The output is:
python
Show answer
Correct Option: D

names =['Amir', 'Barry', 'Chales', 'Dao'] print names [-1][-1] The output is:
python

  1. A

  2. r

  3. Amir

  4. Dao

  5. O

Show answer
Correct Option: E