Java MCQ – Multiple Choice Questions and Answers – Array – Part 1
This collection of Java Multiple Choice Questions and Answers (MCQs): Quizzes & Practice Tests with Answer focuses on “Java Array”.
1. Array is a collection of ________.
A same type of elements
B different type of elements
C heterogeneous data
D Both A and C
2. In Java arrays are ________.
A objects
B object references
C primitive data type
D None of the above
3. We access data in Array using ________.
A Operator
B Variable
C Index
D Pointer
4. On the point of array initialization which is required to specify?
A Row
B Column
C Row and Column
D None of the above
int[] arr = new int[20];
5. Which declaration is valid ?
A char[] arr = new char();
B char[] arr = new char[6];
C char[] arr = new char(7);
D char[] arr = new char[];
dataType[] arr = new dataType[Size];
As a result, option (A) and option (C) are wrong as parentheses ( ) is used in place of square brackets [ ].
Option (D) is wrong as the size of the array is missing.
6. Array can allocate __________.
A Static Memory
B Dynamic Memory
C Automatic
D None of the above
7. Which is wrong declaration of array?
A int [] arr = new int[10];
B int arr[] = new int[10];
C int arr[] = new int[10];
D int arr[] = int [10] new;
int arr[] = int [10] new; is a wrong declaration because Operator new must be followed by array type and array size.8. Index in array start with ______.
A -1
B 0
C 1
D null
9. Which is used to declare, create, and initlaize an array?
A int arr [][] = {1, 2, 3};
B int [] arr = (1, 2, 3);
C int arr [] = {1, 2, 3};
D int [] arr = {};
int arr [] = {1, 2, 3}; is used to declare, create, and initlaize an array, so Option A is incorrect because it initializes an int array with String literals. Option B is incorrect because it uses something other than curly braces for the initialization. Option C is incorrect because it provides initial values for only one dimension, despite the declared array is a two-dimensional array.10. We can determine the length of an array using __________.
A sizeof(array)
B array.len
C array.length
D array.sizeof()
array.length.
- Java MCQ – Enumerations
- Java MCQ – Data structures (Arrays)
- Java MCQ – Generic types
- Java 8 MCQ Online Test – Part 1
- Java 8 MCQ Online Test – Part 2
- J2EE MCQ with Answers
- Java MCQ – Classes and Objects
- Java MCQ – JDK JRE JVM and JIT
- Java MCQ – Exception Handling – Part 1
- Java MCQ – Exception Handling – Part 2
- Java MCQ – Collections – Part 1
- Java MCQ – Collections – Part 2
- Java MCQ – Collections – Part 3
- Java MCQ – Collections – Part 4
- Java MCQ – Interfaces – Part 1
- Java MCQ – Interfaces – Part 2
- Java MCQ – Multiple Choice Questions and Answers – Data Types and Variables – Part 1
- Java MCQ – Multiple Choice Questions and Answers – Data Types and Variables – Part 2
- Java MCQ – Multiple Choice Questions and Answers – Array – Part 1
- Java MCQ – Multiple Choice Questions and Answers – Array – Part 2
- Java MCQ – Multiple Choice Questions and Answers – Strings – Part 1
- Java MCQ – Multiple Choice Questions and Answers – Strings – Part 2
- Java MCQ – Multiple Choice Questions and Answers – Strings – Part 3
- Java MCQ – Multiple Choice Questions and Answers – Strings – Part 4
- Java MCQ – Multiple Choice Questions and Answers – OOPs
