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GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

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Computer Fundamentals → Introduction to Computer 37

Inheritance in Python is defined as?
class Child(Parent):
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Python multiple inheritance is?
Supported — class C(A, B): inherits from both A and B
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MRO (Method Resolution Order) in Python?
Order in which Python searches classes for method/attribute in inheritance
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Python __str__ method is called by?
print() function and str() conversion
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What is the output of 5//2 in Python?
2
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Python operator ** is used for?
Exponentiation (power)
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Which Python module is used for regular expressions?
re
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os.path.join() in Python is used for?
Building file paths in an OS-independent way
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Which Python library is used for HTTP requests?
requests
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JSON module in Python provides?
Encoding/decoding JSON data (json.dumps, json.loads)
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Python f-strings (f'Hello {name}') provide?
Inline expression evaluation within strings (formatted string literals)
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Which Python keyword checks membership in a sequence?
in
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enumerate() in Python?
Returns index-value pairs when iterating over a sequence
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What is the output of bool('') in Python?
False
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Python None is?
Null equivalent — absence of value
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Which sorting method does Python's list.sort() use?
Timsort (hybrid merge sort + insertion sort)
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zip() function in Python?
Combines multiple iterables element-by-element into tuples
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map() function in Python?
Applies a function to every element of an iterable
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filter() function in Python?
Returns elements from iterable where function returns True
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reduce() function is imported from?
functools module
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Python set is?
Unordered, no duplicates, mutable
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frozenset in Python is?
Immutable version of set — hashable, can be used as dictionary key
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deque in Python (collections.deque)?
Double-ended queue — efficient append/pop from both ends
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defaultdict in Python?
Dictionary with default value for missing keys — no KeyError
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Counter in Python (collections.Counter)?
Dictionary subclass counting hashable objects by frequency
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Python's heapq module provides?
Min-heap operations on a regular list
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Which Python module supports regular expressions?
re
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What does 'is' operator check in Python?
Identity — whether two variables point to same object in memory
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Pickling in Python?
Serializing Python objects to byte stream for storage/transmission
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__slots__ in Python class?
Restricts instance attributes and reduces memory usage
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Abstract class in Python is created using?
ABC module (from abc import ABC, abstractmethod)
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Python @property decorator?
Allows a method to be accessed like an attribute (getter/setter)
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Which Python framework is used for web development?
Django and Flask
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What is a zero-day exploit?
Attack using vulnerability unknown to vendor with no patch available
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Multi-factor authentication (MFA) categories are?
Something you know, have, and are (knowledge, possession, inherence)
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Which port does HTTPS use?
443
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SSL/TLS handshake purpose is?
Negotiate encryption parameters and exchange keys before secure communication
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Computer Fundamentals → Software and Hardware 1

Python's GIL (Global Interpreter Lock) affects?
Multi-threading — prevents true parallel execution of Python threads in CPython
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Computer Fundamentals → Computer Security 1

Which type of malware encrypts files and demands payment?
Ransomware
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Computer Fundamentals → Internet Basics 1

Phishing email characteristics include?
Urgent language, spoofed sender, suspicious links, requests credentials
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