Explore topic-wise MCQs in Arduino.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Arduino knowledge and support exam preparation. Choose a topic below to get started.

1.

What does the following code do?
int* ptr = (int*)malloc(100 * sizeof(int));

A. Static Memory Allocation
B. Static Memory Clearance
C. Dynamic Memory Allocation
D. Dynamic Memory Clearance
Answer» D. Dynamic Memory Clearance
Discussion
2.

What notation should we use for denoting the breadth of an array?

A. sizeof(a[0])
B. sizeof(a)
C. sizeof(a[])
D. sizeof(a.0)
Answer» B. sizeof(a)
Discussion
3.

What function will we use to find out the number of elements in an array?

A. sizeof()
B. size()
C. sf()
D. sizeOf()
Answer» B. size()
Discussion
4.

When the sizeof() function is invoked on an array. What information does it return?

A. Number of elements in the array
B. The largest element in the array
C. The total sum of the ASCII values of the elements in the array
D. The largest ASCII value of any element in the array
Answer» B. The largest element in the array
Discussion
5.

What is the meaning of the data returned by the sizeof() function?

A. Length
B. Location
C. Pointer
D. Memory
Answer» B. Location
Discussion