Top MCQs on Data Structures | DSA Quiz for Beginners

Question 1

Which of the following syntax correctly declares an Array?

• int geeks;

• array geeks[20];

• geeks{20};

• int geeks[20];

Question 2

The size of the array should always be _____

• Positive

• Negative

• whole Number

• Real Number

Question 3

What is the correct way to initialize values in an array?

• my_array [5] = (5,3,4,2,7);

• my_array [5] = {5;3;4;2;7};

• my_array [5] = {5,3,4,2,7,5,6,7,8};

• my_array [5] = {1,2,3,4,5};

Question 4

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

Question 5

Which of these operators can be used to concatenate two or more String objects?

• "+"

• "+="

• "&"

• None of these

Question 6

Which of these methods of class String is used to obtain the length of the String object?

• get()

• Sizeof()

• lengthof()

• length()

Question 7

In a circular linked list, the last node points to the____.

• this pointer

• tail pointer

• first node

• middle node

Question 8

What advantage does a linked list have over an array?

• A linked list is not of a fixed size

• It's better

• It is easier to use

• A linked list can give you the data faster

Question 9

Nodes in a linked list contain two things: 

• A pointer and a node

• A Pointer and a reference

• Direction and a pointer

• Data and a pointer

Question 10

The last node of the singly-linked list contains ___

• NULL

• Next pointer

• Data

• None of the above