1. What is a LinkedHashSet in Java? a) A type of list b) A type of map c) A hashed linked list d) A set implementation that maintains a linked list across its elements Click to View Answer and Explanation Answer: d) A set implementation that maintains a linked list across its elements Explanation: LinkedHashSet […]
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1. What is a HashSet in Java? a) A dynamic array b) A collection that uses a hash table for storage c) A linked list d) A data structure for key-value pairs Click to View Answer and Explanation Answer: b) A collection that uses a hash table for storage Explanation: HashSet in Java is a
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1. What is a LinkedList in Java? a) A type of array b) A static data structure c) A dynamic data structure allowing sequential access d) A collection of nodes linked together Click to View Answer and Explanation Answer: d) A collection of nodes linked together Explanation: A LinkedList in Java is a linear data
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1. What is an ArrayList in Java? a) A dynamic array b) A static array c) A linked list d) A hash table Click to View Answer and Explanation Answer: a) A dynamic array Explanation: ArrayList in Java is a resizable array implementation of the List interface. 2. How do you instantiate an ArrayList in
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1. What is an exception in Java? a) An error in the code syntax b) A runtime error disrupting the normal flow of the program c) A compile-time error d) A warning during program execution Click to View Answer and Explanation Answer: b) A runtime error disrupting the normal flow of the program Explanation: An
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1. What is a thread in Java? a) A sequence of executed statements b) A lightweight process c) A library for handling data d) A type of array Click to View Answer and Explanation Answer: b) A lightweight process Explanation: In Java, a thread is a lightweight process that allows for concurrent execution within a
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1. What is method overriding in Java? a) Renaming a method in a subclass b) Changing the return type of a method in a subclass c) Defining a method in a subclass that already exists in the superclass d) Creating a new method in a subclass that does not exist in the superclass Click to
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1. What is method overloading in Java? a) Defining multiple methods with the same name in different classes b) Defining a method in a subclass with the same name as the superclass c) Defining multiple methods with the same name but different parameter lists in a class d) Changing the return type of an existing
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1. What is polymorphism in Java? a) The ability of a variable to hold different data types b) The concept of allowing methods to perform different tasks based on the object c) The process of changing the state of an object d) The ability to define multiple variables in a single declaration Click to View
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1. What is inheritance in Java? a) Copying methods from one class to another b) The process where one class acquires the properties of another c) The ability to run methods concurrently d) The process of encapsulating data Click to View Answer and Explanation Answer: b) The process where one class acquires the properties of
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1. What is the primary purpose of a package in Java? a) To provide a library of executable methods b) To group related classes and interfaces c) To enhance the performance of Java applications d) To compile Java programs Click to View Answer and Explanation Answer: b) To group related classes and interfaces Explanation: Packages
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1. What is a constructor in Java? a) A method that returns a value b) A special method used to initialize objects c) A static method called at class loading d) A final method in a class Click to View Answer and Explanation Answer: b) A special method used to initialize objects Explanation: A constructor
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1. What is the primary purpose of a class in Java? a) To create a new data type b) To serve as a blueprint for objects c) To execute a program d) To store variables Click to View Answer and Explanation Answer: b) To serve as a blueprint for objects Explanation: A class in Java
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1. What does OOP stand for in Java? a) Object-Oriented Programming b) Operational Object Programming c) Organized Oriented Programming d) Oriented Operational Programming Click to View Answer and Explanation Answer: a) Object-Oriented Programming Explanation: OOP stands for Object-Oriented Programming, a paradigm centered around objects and classes. 2. What is a Class in Java? a) A
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1. Which access modifier in Java specifies the highest level of access? a) private b) protected c) public d) default Click to View Answer and Explanation Answer: c) public Explanation: The public access modifier allows the widest level of access, making the class or class member accessible from anywhere. 2. What is the default access
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1. What is the basic structure of a for loop in Java? a) for (initialization; condition; update) { // code } b) for (condition; initialization; update) { // code } c) for (condition) { // code } d) for (initialization; update; condition) { // code } Click to View Answer and Explanation Answer: a) for
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1. What is the primary function of the while loop in Java? a) To execute a block of code a fixed number of times b) To execute a block of code as long as a specified condition is true c) To iterate over elements of an array d) To execute a block of code at
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A lambda function in Python is a concise and anonymous function defined using the lambda keyword. It can take any number of arguments but must consist of a single expression. The expression is evaluated and returned as the result when the lambda function is called. Lambda functions are often used for simple, one-off operations and
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Functions in Python are blocks of code that are defined with the <em>def</em> keyword. They are executed only when they are called. Functions can accept input data known as parameters or arguments, and they can also return data as a result. This allows you to encapsulate and reuse code, making your programs more organized and
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The for loop in Python is a control flow statement that is used to iterate over a sequence (such as a list, tuple, set, dictionary, or string) or other iterable objects. Here we present 12 multiple-choice questions to test your knowledge of Python For Loop. Each MCQ has the correct answer with an explanation. 1. What
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Python’s while loop is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition. Here we present 12 multiple-choice questions to test your knowledge of Python While Loop. Each MCQ has the correct answer with an explanation. 1. What is the basic structure of a while loop in Python?
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Python’s if…else statement is a fundamental control flow tool that allows you to execute code based on certain conditions. Here we present 12 multiple-choice questions to test your knowledge of Python if-else statement. Each MCQ has the correct answer with an explanation. 1. What is the correct syntax for an if statement in Python? a)
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Python dictionaries are a type of collection in Python. They store data in key-value pairs and are mutable, meaning you can add, modify, and delete their key-value pairs. Here we present 20 multiple-choice questions to test your knowledge of Python Dictionaries. Each MCQ has the correct answer with an explanation. 1. What is a dictionary
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Sets in Python are an unordered collection of unique elements. They are mutable, allowing the addition and removal of elements, but the elements themselves must be immutable. Sets are useful for membership testing, removing duplicates from a sequence, and performing mathematical operations such as unions, intersections, differences, and symmetric differences. Here we present 15 multiple-choice
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Tuples in Python are fundamental data structure that function as immutable sequences. They are used to store multiple items in a single variable and can contain elements of different types. Here we present 15 multiple-choice questions to test your knowledge of Python Tuples. Each MCQ has the correct answer with an explanation. 1. How is
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