Data Types and Structures: Master the Basics of Data Representation

Question 1

What is the maximum value that can be stored in a 16-bit signed integer?

Accepted Answer

32,767

Answer

-32,768

Answer

65,535

Answer

-65,536

Question 2

What is the purpose of an array?

Accepted Answer

To store a collection of related data.

Answer

To perform mathematical calculations.

Answer

To control the flow of a program.

Answer

To store user input.

Question 3

Which of the following is a valid array declaration in Python?

Accepted Answer

arr = [1, 2, 3, 4, 5]

Answer

arr = {1, 2, 3, 4, 5}

Answer

arr(1, 2, 3, 4, 5)

Answer

arr[1, 2, 3, 4, 5]

Question 4

In programming, how is the size of an array typically determined, and what occurs when the array's size is exceeded?

Accepted Answer

Array size is fixed at compile time, and exceeding it causes a runtime error.

Answer

Array size is dynamic, automatically increasing when exceeded.

Answer

Array size is set by the programmer and can be modified at runtime, creating a new array if exceeded.

Answer

Array size is determined by the operating system and exceeding it can lead to system failure.

Question 5

Which among the following is not a primitive data type in Java?

Accepted Answer

String

Answer

int

Answer

double

Answer

boolean

Question 6

What is the primary purpose of a data structure?

Accepted Answer

To organize and represent data within a computer system

Answer

To perform mathematical operations on data

Answer

To store user-provided input

Answer

To control the flow of execution in a program

Question 7

What is the key distinction between a stack and a queue data structure?

Accepted Answer

A stack adheres to LIFO (Last In, First Out) order, while a queue follows FIFO (First In, First Out) order

Answer

A queue adheres to LIFO (Last In, First Out) order, while a stack follows FIFO (First In, First Out) order

Answer

Both stacks and queues follow FIFO (First In, First Out) order

Answer

Both stacks and queues follow LIFO (Last In, First Out) order

Question 8

What is a primary benefit of utilizing an array as a data structure?

Accepted Answer

Efficient access to elements at random positions

Answer

Capacity to store data of diverse types

Answer

Dynamic adjustment of size

Answer

Versatile organization of data

Question 9

In the context of data structures, what is encapsulation?

Accepted Answer

Concealing the implementation details of a data structure from its users

Answer

Safeguarding data from unauthorized access

Answer

Optimizing data access for performance enhancement

Answer

Simplifying the upkeep of data structures

Question 10

What is the primary function of a hash table?

Accepted Answer

Providing rapid access to data based on a key

Answer

Storing data in a sorted manner

Answer

Representing hierarchical relationships between data elements

Answer

Managing large datasets efficiently

Question 11

When searching for an element in a binary search tree, what is the associated time complexity?

Accepted Answer

O(log n)

Answer

O(n)

Answer

O(n^2)

Answer

O(1)

Question 12

Which data type is used to represent numbers without a decimal point?

Accepted Answer

Integer

Answer

Float

Answer

Double

Answer

String

Question 13

What is the maximum value that can be represented by a 32-bit signed integer?

Accepted Answer

2,147,483,647

Answer

4,294,967,295

Answer

9,223,372,036,854,775,807

Answer

18,446,744,073,709,551,615

Question 14

Which data structure represents a collection of elements that can be accessed by index?

Accepted Answer

Array

Answer

Linked List

Answer

Stack

Answer

Tree

Question 15

Which sorting algorithm is known for its efficiency, even for large data sets?

Accepted Answer

Merge Sort

Answer

Bubble Sort

Answer

Insertion Sort

Answer

Selection Sort

Question 16

Which data structure follows the last-in, first-out (LIFO) principle?

Accepted Answer

Stack

Answer

Queue

Answer

Linked List

Answer

Tree

Question 17

Which data structure is suitable for representing hierarchical data?

Accepted Answer

Trees

Answer

Arrays

Answer

Linked Lists

Answer

Hash Tables

Question 18

What is the primary purpose of a hash table?

Accepted Answer

To efficiently store and retrieve key-value pairs.

Answer

To sort data in ascending order.

Answer

To represent relationships between objects.

Answer

To implement a queue or stack.

Question 19

Which data type is used to store whole numbers without decimal points?

Accepted Answer

Integer

Answer

String

Answer

Float

Answer

Double

Question 20

Which data structure stores data in a linear fashion, with each element accessible via an index?

Accepted Answer

Array

Answer

Stack

Answer

Queue

Answer

Tree

Question 21

Which data type is suitable for storing dates and times with accuracy?

Accepted Answer

Date

Answer

String

Answer

Integer

Answer

Double

Question 22

Which data structure follows the first-in, first-out (FIFO) principle?

Accepted Answer

Queue

Answer

Tree

Answer

Array

Answer

Stack

Question 23

What is the key difference between primitive and reference data types?

Accepted Answer

Primitive data types are stored directly in memory, while reference data types store a memory address to access the actual data.

Answer

Primitive data types can be modified, while reference data types cannot be modified.

Question 24

What defines a binary tree data structure?

Accepted Answer

A hierarchical structure where each node has a maximum of two child nodes.

Answer

A non-linear structure where elements are connected by multiple paths.

Answer

A linear structure where elements are connected by a single path.

Question 25

Which data type is appropriate for storing a student's grade point average?

Accepted Answer

Float

Answer

String

Answer

Boolean

Answer

Integer

Question 26

What is the main purpose of encapsulation in data structures?

Accepted Answer

To protect data from unauthorized access and changes.

Answer

To enhance data readability

Answer

To reduce memory usage