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| Section | Objectives |
|---|---|
| File Handling and Exceptions | - Custom Exceptions - Reading and Writing Files - Exception Handling (try, except, finally) |
| Object-Oriented Programming | - Attributes and Methods - Encapsulation - Inheritance - Constructors (__init__) - Classes and Objects |
| Python Fundamentals | - Type Conversion - Variables and Data Types - Operators and Expressions - Input/Output Operations |
| Data Structures | - Lists and List Operations - String Manipulation - Dictionaries - Sets - Tuples |
| Functions | - Recursion - Return Values - Parameters and Arguments - Function Definition and Call - Scope (local and global) |
| Control Structures | - Nested Conditionals and Loops - Conditional Statements (if, elif, else) - Loops (for, while) - Loop Control (break, continue, pass) |
| Testing and Debugging | - Debugging Techniques - Unit Testing Concepts - Trace Errors |
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NEW QUESTION # 58
How can the first four characters be extracted from the string ' computer ' ?
Answer: C
Explanation:
Python strings are sequences, and sequence values can be accessed using indexing and slicing.
The first character in a Python string has index 0. To extract the first four characters from ' computer ' , the slice should start at index 0 and stop at index 4.
Example:
' computer ' [0:4]
Result:
' comp '
In Python slicing, the start index is included, but the stop index is excluded. So [0:4] includes characters at indexes 0, 1, 2, and 3.
The official Python documentation explains that slicing with a[start:stop] selects items from the start index up to, but not including, the stop index.
Therefore, the correct answer is A. ' computer ' [0:4].
NEW QUESTION # 59
Which Python data structure contains only unique elements and does not support indexing?
Answer: D
Explanation:
A set is a Python data structure that stores only unique elements. This means duplicate values are automatically removed.
Example:
numbers = {1, 2, 2, 3}
print(numbers)
Output:
{1, 2, 3}
The duplicate value 2 appears only once in the set.
Sets are also unordered, so they do not support indexing like lists or tuples do. For example, numbers[0] would cause an error because sets are not accessed by position.
The official Python documentation describes sets as unordered collections with no duplicate elements.
Therefore, the correct answer is D. Set.
NEW QUESTION # 60
Complete the function update_grade(grades, student, new_grade) that takes a grades dictionary, a student name, and a new grade, then updates that student ' s grade and returns the dictionary.
For example, update_grade({ " Alice " : 85, " Bob " : 90}, " Alice " , 95) should return { " Alice " : 95, " Bob
" : 90}.
Answer: D
Explanation:
A dictionary stores data as key-value pairs. In this function, the student name is the key, and the grade is the value.
Correct code:
def update_grade(grades, student, new_grade):
grades[student] = new_grade
return grades
Example:
update_grade({ " Alice " : 85, " Bob " : 90}, " Alice " , 95)
Result:
{ " Alice " : 95, " Bob " : 90}
Python's built-in types documentation includes dictionaries as mapping types, where values are accessed and updated using keys.
Therefore, the correct answer isA.
NEW QUESTION # 61
What must be consistent within a Python code block for the code to run without syntax errors?
Answer: B
Explanation:
In Python, indentation is used to group statements into a code block. A block must have a consistent indentation level so Python can correctly understand which statements belong together.
For example:
if True:
print( " Hello " )
print( " World " )
Both print() statements belong to the same if block because they use the same indentation level.
If indentation is inconsistent, Python can raise an IndentationError or TabError.
Therefore, the correct answer isB. Indentation level.
NEW QUESTION # 62
Which data type is the value 3.14 in Python?
Answer: A
Explanation:
The value 3.14 is afloatbecause it contains a decimal point.
Example:
type(3.14)
This returns:
< class ' float ' >
Python's built-in numeric types include integers and floating-point numbers. A value with a decimal part, such as 3.14, is treated as a floating-point number.
Therefore, the correct answer isB. Float.
NEW QUESTION # 63
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