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Array Quiz for DSA
Question 1
Which option correctly define the advantages of array?
- A
Arrays allow random access and cache friendliness due to contiguous memory allocation.
- B
Arrays allow efficient insertions and deletions in the middle.
- C
Arrays provide low memory usage by storing references instead of actual data.
- D
Arrays are slower than other data structures in accessing elements.
Question 2
The first Index of the array typically starts from -----
- A
-1
- B
1
- C
0
- D
None of the Above
Question 3
Which method is used to access elements in an array?
- A
Sequential
- B
Random
- C
Logarithmic
- D
Alternative
Question 4
How are arrays stored in memory?
- A
Each element is stored at a random memory location.
- B
All elements are stored in a contiguous block of memory.
- C
Arrays are stored in reverse order.
- D
Elements are dynamically linked to the next element in memory.
Question 5
What are the disadvantages of static arrays?
- A
Data structures like queue or stack cannot be implemented
- B
There are chances of wastage of memory space if elements inserted in an array are lesser than the allocated size
- C
Index value of an array can be negative
- D
Elements are sequentially accessed
Question 6
How are elements of dynamic array stored in the memory
- A
Each element is stored at a random memory location.
- B
Elements are dynamically linked to the next element in memory.
- C
Each element is stored in a contiguous memory locations
- D
Elements are grouped and each group is stored at a random memory location .
Question 7
What is the difference between declaring and initializing an array?
- A
Declaring an array specifies its size, while initialization gives it values
- B
Initialization creates an empty array, and declaration assigns values to it
- C
Declaring an array also initializes it to default values
- D
There is no difference between declaring and initializing an array
Question 8
What is a 2d array?
- A
An array where each element is a single value.
- B
An array that stores elements is a single row.
- C
an array of arrays or a matrix consisting of rows and columns.
- D
An array that contains only integers.
Question 9
How are the elements accessed in a 2d array ?
- A
array(i, j)
- B
array[i, j]
- C
array[ i ][ j ]
- D
array{ i }{ j }
Question 10
What is the time complexity for inserting/deleting at the beginning of the array?
- A
O(1)
- B
O(N log N)
- C
O(log N)
- D
O(N)
There are 20 questions to complete.
