CS Free MCQ Bank

Option D

In Python, a Dictionary is a data type used to store data in the form of key–value pairs. Dictionaries are enclosed within curly braces { }. Each key is associated with a value using a colon : (colon).
In the given statement Student = {'SUBJECT':'Compiler', 'Marks':'50', 'Grade':'C'}

• SUBJECT, Marks, and Grade are keys.
• Compiler, 50, and C are corresponding values.

Option C

The precedence of logical operator in Python is:

• The not has highest priority.
• The and has medium priority.
• The or has lowest priority.
• Means order of evaluation is  not > and > or

Option B

In Python, negative indexing is used to access characters from the end (right side) of a string.

The character at index str1[-3] is 'e'.

Option C

Python is a popular high-level programming language known for its simplicity and readability. It is a high-level, interpreted language and portable across different operating systems.
However, Python is case-sensitive language. This means uppercase and lowercase letters are treated differently.
>>>name = "Suresh"
>>>Name = "Rampayari"
>>print(name)
>>>print(Name)
Here, name and Name are treated as two different variables.

Option C

In Python, the symbol >>> is called the Python Prompt. It appears in the Python interpreter when Python is ready to accept and execute commands entered by the user.
It indicates that the interpreter is active and waiting for instructions.

Option A

The pickle module in Python is used for serializing and deserializing Python objects.

• Serialization (pickling): Convert a Python object into a byte stream.
• Deserialization (unpickling): Convert a byte stream back into a Python object hierarchy.

Option A

In Python, the operator // is called the floor division. It divides the left operand by the right operand and provide the integer (floor) result.
The statement x //= y means x = x//y. Here, 125//13 gives 9 because floor division removes the decimal part and returns only the integer quotient. Therefore, the final value of x becomes 9.

Option A

In Python, negative indexes count from the end of the list.

Positive Indexing starts from left to right:
Index:      0          1           2
Value: 'spam'  'Spam'  'SPAM!'
Negative Indexing start from right to left:
Index:    -3         -2          -1
Value: 'spam'  'Spam'  'SPAM!'

Option B

In Python, the range(3) function generates numbers starting from 0 up to 2. So the loop runs for 0,1, and 2.

Therefore, the printed output is 100 200

Option B

In Python, writing xyzp = 5,000,000 is syntactically correct, but it does not store the integer 5000000. Instead, Python treats the commas as separators and creates a tuple (5, 0, 0). If we want to store 5000000 in python variable then correct way is either xyzp = 5000000 or xyzp = 5_000_000 for readability.

The statement, x, y, z, p = 5000, 6000, 7000, 8000 uses tuple unpacking, assigning each number to a separate variable: x = 5000, y = 6000, z = 7000, and p = 8000. This is a valid and commonly used Python syntax.

The statement, x_y_z_p = 5,000,000, is similar to statement xyzp = 5,000,000. It is syntactically correct, and the variable name is valid, but the value becomes a tuple (5, 0, 0).

The statement, xyzp = 5000 6000 7000 8000, is completely invalid in Python. The numbers cannot be written separated by spaces, and this will throw a syntax error.

Option A

In Python, variables are created using an assignment statement. The assignment operator = is used to assign a value to a variable. Therefore, Statement II is true because assignment statements are used to create variables and assign values.
The Statement I is that “Values of every variable can be changed once a variable has been created and assigned value.”
This statement is not always true because Python has both Mutable (list, dictionary, set) and Immutable (int, float, tuple, string) data types. The immutable objects cannot be changed after creation.