Array Data Structure Quiz for Beginners

Question 1

The size of the array should always be _____

Positive
Negative
whole Number
Real Number

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Question 2

With the help of which operator array elements can be accessed?

Parenthesis ( )
Braces { }
Subscript Operator [ ]
None of these

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Question 3

Which of the following statement is correct about array?

The size of the array is fixed.
The size of the array is dynamic.
Random access is not possible in an array.
None of these

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Question 4

Which of the following syntax correctly declares an Array in C/C++?

int geeks;
array geeks[20];
geeks{20};
int geeks[20];

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Question 5

What is the output of the following code:

C++

#include <bits/stdc++.h>
using namespace std;

int main() {

    int arr[5] = {1, 2, 3};
  
    //Printing the value
    cout<< arr[4]<<endl;
    return 0;
}

3
Compile error
Run time error
0

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Question 6

Which of the following statements correctly declares a two-dimensional integer array in C/C++?

arr[5 *4]
int arr[5][4];
arr[2][2]
All of these

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Question 7

In an array int arr[3]={1,2,3}, what will happen if we try to access arr[4] in C/C++?

Run TIme error
3
0
Garbage Value

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Question 8

What is the output of the following program?

C++

#include <iostream>
using namespace std;

int main()
{

    int arr[5] = { 2, 6, 8, 13, 19 };

    // Modifing the data
    for (int i = 0; i < 5; i += 2)
        arr[i]++;
    for (int i = 0; i < 5; i++)
        cout << arr[i] << endl;

    return 0;
}

2, 6, 8, 13, 19
3, 6, 9, 13, 20
3, 7, 9, 14, 20
None of these

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Question 9

What is the time complexity to insert a single element in the array?

O(1)
O(n)
O(log n)
none

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Question 10

What is the famous mathematical example of 2-d array?

cube
Dice
Matrix
none

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1 2 3

There are 30 questions to complete.

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