DATA STRUCTURE QUIZ

Which data structure is used in recursion?

• Queue

• Stack

• Heap

• Tree

Which data structure supports efficient dynamic memory allocation?

• Array

• Queue

• Linked List

•  Stack

Which of the following operations is NOT efficient for arrays?

• Accessing an element by index

• Inserting an element at the end.

• Deleting an element from the middle.

• Traversing all elements.

What is the primary disadvantage of using arrays?

• They require more memory than linked lists.

• They do not allow random access.

• Their size is fixed after creation.

• They cannot store multiple data types.

If an array is declared as " int arr[10]; " how many elements can it hold?

• 5

• 9

• 11

• 10

What will be the output of the following code?

int arr[5] = {1, 2, 3, 4, 5};

int *p = arr;

printf("%d", *(p + 2));

• 2

• 3

• 4

• 5

What will be the output of the following code?

int arr[5] = {1, 2, 3, 4, 5};

for (int i = 0; i < 5; i++) {

arr[i] *= 2;

}

printf("%d", arr[2]);

• 2

• 4

• 6

• 3

What will happen if you run the following code?

int arr[3] = {1, 2};

printf("%d", arr[2]);

• It will print 0.

• It will print an error.

• It will print garbage value.

• It will print 2.

Which of the following statements about expressions in data structures is true?

• Expressions can only be arithmetic.

• Expressions can include logical and relational operators.

• Expressions cannot be nested.

• Expressions must always return an integer.

Which of the following is NOT a valid expression in C?

• a + b

•  a && b

• a * b / c

• a + b *

Answer explanation

The expression a + b * is incomplete and will result in a syntax error.