Questions and answers for exam Preparation

MCQs

Total Questions : 10

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int array[] = {10, 20, 30};
6.
cout << -2[array];
7.
return 0;
8.
}

-15
-30
compile time error
garbage value

Discuss Question

Answer: Option B. -> -30

It's just printing the negative value of the concern element.
$ g++ array.cpp
$ a.out
-30

Question 2.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
char str[5] = "ABC";
6.
cout

ABC
ABCD
AB
None of the mentioned

Discuss Question

Answer: Option A. -> ABC

We are just printing the values of first 3 values.
$ g++ array.cpp
$ a.out
ABC

Question 3.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int a = 5, b = 10, c = 15;
6.
int arr[3] = {&a, &b, &c};
7.
cout

15
18
garbage value
compile time error

Discuss Question

Answer: Option D. -> compile time error

The conversion is invalid in this array. So it will arise error. The following compilation error

will be raised:
cannot convert from 'int *' to 'int'

Question 4.

What will be the output of the this program?

1.
#include
2.
using namespace std;
3.
int main ()
4.
{
5.
int array[] = {0, 2, 4, 6, 7, 5, 3};
6.
int n, result = 0;
7.
for (n = 0; n < 8; n++) {
8.
result += array[n];
9.
}
10.
cout

25
26
27
None of the mentioned

Discuss Question

Answer: Option D. -> None of the mentioned

We are adding all the elements in the array and printing it. Total elements in the array is 7, but

our for loop will go beyond 7 and add a garbage value.

Question 5.

What will be the output of this program?

1.
#include
2.
using namespace std;
3.
int array1[] = {1200, 200, 2300, 1230, 1543};
4.
int array2[] = {12, 14, 16, 18, 20};
5.
int temp, result = 0;
6.
int main()
7.
{
8.
for (temp = 0; temp < 5; temp++) {
9.
result += array1[temp];
10.
}
11.
for (temp = 0; temp < 4; temp++) {
12.
result += array2[temp];
13.
}
14.
cout

6553
6533
6522
12200

Discuss Question

Answer: Option B. -> 6533

In this program we are adding the every element of two arrays. Finally we got output as 6533.
Output:
$ g++ array.cpp
$ a.out
6533

Question 6.

Which of the following accesses the seventh element stored in array?

array[6];
array[7];
array(7);
array;

Discuss Question

Answer: Option A. -> array[6];

The array location starts from zero, So it can accessed by array[6].

Question 7.

What is the index number of the last element of an array with 9 elements?

9
8
0
Programmer-defined

Discuss Question

Answer: Option B. -> 8

Because the first element always starts at 0. So it is on 8 position.

Question 8.

Which of the following correctly declares an array?

int array[10];
int array;
array{10};
array array[10];

Discuss Question

Answer: Option A. -> int array[10];

Because array variable and values need to be declared after the datatype only.

Question 9.

What is a array?

An array is a series of elements of the same type in contiguous memory locations
An array is a series of element
An array is a series of elements of the same type placed in non-contiguous memory locations
None of the mentioned

Discuss Question

Answer: Option A. -> An array is a series of elements of the same type in contiguous memory locations

None.

Question 10.

Which of the following gives the memory address of the first element in array?