Data Structures Quiz

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Questions and Answers

What is the order of elements processed in a queue?

Last-In-First-Out (LIFO)

Last-In-Last-Out (LILO)

Random order

First-In-First-Out (FIFO) (correct)

Which data structure allows for insertion and deletion at both ends?

Stack

Linked List

Queue

Deque (correct)

What is the time complexity of accessing an element in an array by its index?

O(log n)

O(1) (correct)

O(n)

O(n^2)

Which primitive data type occupies 16 bits in Java?

short Signup and view all the answers

What is the primary distinction between ArrayList and LinkedList in Java?

ArrayList is backed by arrays, LinkedList is backed by nodes Signup and view all the answers

Which primitive data type in Java has a precision of approximately 15 decimal digits?

double Signup and view all the answers

What is the size (in bytes) of the long primitive data type in Java?

8 Signup and view all the answers

Which of the following primitive types has the smallest storage size?

byte Signup and view all the answers

Which data structure enables graph representation effectively by storing elements in nodes connected by edges?

Graph Signup and view all the answers

In terms of operations, which data structure allows for accessing elements in a non-linear fashion?

Graph Signup and view all the answers

What is the fundamental characteristic of a Deque that differentiates it from a traditional queue?

It allows insertion and deletion at both ends. Signup and view all the answers

Which primitive data type provides a greater range compared to others in Java's standard options?

int Signup and view all the answers

Which data structure is preferred when frequent insertion and deletion at various locations is a primary requirement?

LinkedList Signup and view all the answers

Which aspect differentiates a float from a double in Java?

Float has a precision of approximately 6 decimal digits, while double is about 15. Signup and view all the answers

Which Java primitive data type is used to store integers with negative values?

int Signup and view all the answers

What is a unique characteristic of a HashMap in comparison to a traditional array?

HashMap provides constant time performance for insertions and lookups. Signup and view all the answers

Study Notes

Data Structures

Tree: A hierarchical structure consisting of nodes with a single root node and zero or more child nodes.
Graph: A collection of nodes (vertices) connected by edges, which may be directed or undirected.
Stack: A linear data structure that follows the Last-In-First-Out (LIFO) principle.
HashMap: A data structure that stores key-value pairs, allowing fast data retrieval based on the key.

Time Complexity

Accessing an element in an array by its index has a time complexity of O(1), meaning it takes constant time regardless of the array size.

Queue Processing Order

In a queue, elements are processed in a First-In-First-Out (FIFO) manner, meaning the first element added is the first to be removed.

Insertion and Deletion at Both Ends

A Deque (Double-ended Queue) allows insertion and deletion of elements at both the front and rear, unlike stacks and queues which operate at one end.

ArrayList vs. LinkedList in Java

ArrayList uses dynamic arrays for storage, while LinkedList relies on doubly linked nodes, affecting performance for inserts and accesses.
ArrayList is faster for accessing elements compared to LinkedList, which excels at inserting and removing elements from the beginning.

Primitive Data Types

double has a precision of approximately 15 decimal digits, making it suitable for high-precision calculations.
short occupies 16 bits (2 bytes) in Java.
The int data type has a range of -2^31 to 2^31 - 1, covering a substantial integer range.
The size of the long primitive data type in Java is 8 bytes (64 bits).
The smallest primitive type in terms of storage is byte, occupying 1 byte (8 bits).

Data Structures

Tree: A hierarchical structure consisting of nodes with a single root node and zero or more child nodes.
Graph: A collection of nodes (vertices) connected by edges, which may be directed or undirected.
Stack: A linear data structure that follows the Last-In-First-Out (LIFO) principle.
HashMap: A data structure that stores key-value pairs, allowing fast data retrieval based on the key.

Time Complexity

Accessing an element in an array by its index has a time complexity of O(1), meaning it takes constant time regardless of the array size.

Queue Processing Order

In a queue, elements are processed in a First-In-First-Out (FIFO) manner, meaning the first element added is the first to be removed.

Insertion and Deletion at Both Ends

A Deque (Double-ended Queue) allows insertion and deletion of elements at both the front and rear, unlike stacks and queues which operate at one end.

ArrayList vs. LinkedList in Java

ArrayList uses dynamic arrays for storage, while LinkedList relies on doubly linked nodes, affecting performance for inserts and accesses.
ArrayList is faster for accessing elements compared to LinkedList, which excels at inserting and removing elements from the beginning.

Primitive Data Types

double has a precision of approximately 15 decimal digits, making it suitable for high-precision calculations.
short occupies 16 bits (2 bytes) in Java.
The int data type has a range of -2^31 to 2^31 - 1, covering a substantial integer range.
The size of the long primitive data type in Java is 8 bytes (64 bits).
The smallest primitive type in terms of storage is byte, occupying 1 byte (8 bits).

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Description

Test your knowledge on data structures including trees, graphs, stacks, and hash maps. This quiz covers fundamental concepts and time complexities associated with these structures. Ideal for students studying computer science or software engineering.