#1
What is a two-dimensional array?
An array that can hold multiple arrays
ExplanationTwo-dimensional arrays are arrays that can hold other arrays as elements.
#2
How do you declare a two-dimensional array in C++?
int array[rows][columns];
ExplanationIn C++, a two-dimensional array is declared with the syntax 'int array[rows][columns];'.
#3
Which of the following is true about two-dimensional arrays?
Each element in a 2D array must be of the same data type
ExplanationTwo-dimensional arrays require all elements to be of the same data type.
#4
What is the index of the element at the second row and third column in a 2D array?
(2, 3)
ExplanationThe index of the element at the second row and third column in a 2D array is (2, 3).
#5
In Java, how do you initialize a 2D array with specific values?
int[][] array = { {1, 2, 3}, {4, 5, 6} };
ExplanationIn Java, a 2D array can be initialized with specific values using curly braces for each row.
#6
What is the time complexity for accessing an element in a 2D array?
O(1)
ExplanationAccessing an element in a 2D array has a time complexity of O(1).
#7
What is the syntax for accessing an element in a 2D array in Python?
array[row][column]
ExplanationIn Python, elements of a 2D array are accessed using the syntax 'array[row][column]'.
#8
What is a jagged array?
An array with irregular number of elements
ExplanationA jagged array is an array whose elements are arrays of different sizes.
#9
What is the maximum number of dimensions a multi-dimensional array can have in C#?
It's unlimited
ExplanationIn C#, multi-dimensional arrays can have unlimited dimensions.
#10
Which of the following languages doesn't support multi-dimensional arrays?
Assembly language
ExplanationAssembly language doesn't support multi-dimensional arrays.
#11
What is the data structure used to represent a two-dimensional array in memory?
Array of arrays
ExplanationA two-dimensional array is typically represented in memory as an array of arrays.
#12
In which situation would you prefer using a jagged array over a multi-dimensional array?
When the number of elements in sub-arrays varies
ExplanationJagged arrays are preferred when sub-arrays have varying numbers of elements.
#13
In which language are arrays always passed by reference?
Python
ExplanationIn Python, arrays are always passed by reference.