EmSAT Achieve Exam > EmSAT Achieve Questions > Which of the following statements about array...
Start Learning for Free
Which of the following statements about arrays in Java is true?
- a)Arrays can dynamically change their size at runtime.
- b)Arrays can only store primitive data types.
- c)Arrays can store elements of different types.
- d)Arrays have a fixed size determined at the time of declaration.
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Which of the following statements about arrays in Java is true?a)Array...
Fixed Size of Arrays in Java
In Java, arrays are used to store multiple elements of the same data type. They provide a convenient way to group related data together. One important characteristic of arrays in Java is that they have a fixed size determined at the time of declaration. This means that once an array is created, its size cannot be changed dynamically during runtime.
Array Declaration and Initialization
To declare an array in Java, you need to specify the data type of the elements it will store and the number of elements it can hold. For example, to declare an array of integers that can store 5 elements, you would write:
int[] nums = new int[5];
This creates an array named "nums" with a fixed size of 5. The array is initialized with default values for the specified data type. In this case, the default value for integers is 0.
Accessing Array Elements
Array elements can be accessed using their index, which represents their position within the array. The index starts from 0 for the first element and goes up to (size - 1) for the last element. For example, to access the first element of the "nums" array declared earlier, you would write:
int firstElement = nums[0];
Array Size Constraints
Since arrays in Java have a fixed size, you need to ensure that the size you specify during declaration is sufficient to store all the elements you will need. If you try to access or modify an element at an index that is outside the valid range for the array, you will encounter an "ArrayIndexOutOfBoundsException".
Dynamically Changing Array Size
If you need a data structure that can dynamically change its size at runtime, you can use other classes provided by Java, such as ArrayList or LinkedList. These classes implement dynamic arrays or linked lists internally and allow you to add or remove elements as needed.
Conclusion
In conclusion, the correct statement about arrays in Java is that they have a fixed size determined at the time of declaration. Arrays are a useful data structure for storing multiple elements of the same type, but their size cannot be changed once they are created. If you need a dynamic data structure, you can use classes like ArrayList or LinkedList.
In Java, arrays are used to store multiple elements of the same data type. They provide a convenient way to group related data together. One important characteristic of arrays in Java is that they have a fixed size determined at the time of declaration. This means that once an array is created, its size cannot be changed dynamically during runtime.
Array Declaration and Initialization
To declare an array in Java, you need to specify the data type of the elements it will store and the number of elements it can hold. For example, to declare an array of integers that can store 5 elements, you would write:
int[] nums = new int[5];
This creates an array named "nums" with a fixed size of 5. The array is initialized with default values for the specified data type. In this case, the default value for integers is 0.
Accessing Array Elements
Array elements can be accessed using their index, which represents their position within the array. The index starts from 0 for the first element and goes up to (size - 1) for the last element. For example, to access the first element of the "nums" array declared earlier, you would write:
int firstElement = nums[0];
Array Size Constraints
Since arrays in Java have a fixed size, you need to ensure that the size you specify during declaration is sufficient to store all the elements you will need. If you try to access or modify an element at an index that is outside the valid range for the array, you will encounter an "ArrayIndexOutOfBoundsException".
Dynamically Changing Array Size
If you need a data structure that can dynamically change its size at runtime, you can use other classes provided by Java, such as ArrayList or LinkedList. These classes implement dynamic arrays or linked lists internally and allow you to add or remove elements as needed.
Conclusion
In conclusion, the correct statement about arrays in Java is that they have a fixed size determined at the time of declaration. Arrays are a useful data structure for storing multiple elements of the same type, but their size cannot be changed once they are created. If you need a dynamic data structure, you can use classes like ArrayList or LinkedList.
Free Test
FREE
| Start Free Test |
Community Answer
Which of the following statements about arrays in Java is true?a)Array...
In Java, arrays have a fixed size that is determined at the time of declaration and cannot be changed.
Attention EmSAT Achieve Students!
To make sure you are not studying endlessly, EduRev has designed EmSAT Achieve study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in EmSAT Achieve.
|
Explore Courses for EmSAT Achieve exam
|
|
Similar EmSAT Achieve Doubts
Top Courses for EmSAT AchieveView all
Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer?
Question Description
Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? for EmSAT Achieve 2024 is part of EmSAT Achieve preparation. The Question and answers have been prepared according to the EmSAT Achieve exam syllabus. Information about Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for EmSAT Achieve 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer?.
Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? for EmSAT Achieve 2024 is part of EmSAT Achieve preparation. The Question and answers have been prepared according to the EmSAT Achieve exam syllabus. Information about Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for EmSAT Achieve 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for EmSAT Achieve.
Download more important topics, notes, lectures and mock test series for EmSAT Achieve Exam by signing up for free.
Here you can find the meaning of Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following statements about arrays in Java is true?a)Arrays can dynamically change their size at runtime.b)Arrays can only store primitive data types.c)Arrays can store elements of different types.d)Arrays have a fixed size determined at the time of declaration.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice EmSAT Achieve tests.
|
|
Explore Courses for EmSAT Achieve exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup