DATA STRUCTURES

Array data can be accessed using _____

• A. Operator

• B. Variable

• C. index

• D. Pointer

Which of the following is an incorrect array declaration?

• A. int [] arr = new int[5]

• B. int arr[] = new int[5]

• C. int arr[] = new int[5]

• D. int arr[] = int [5] new

Which of the following is used to declare, construct, and initialize an array?

• A. int arr [] [] = {1, 2, 3, 4};

• B. int [] arr = (1, 2, 3);

• C. int [] arr = {};

• D. int arr [] = {1, 2, 3};

In java, array elements are stored in ________ memory locations

• A. Random

• B. Sequential

• C. Sequential & Random

• D. Binary search

What will be the output of the program?

class Main

{

public static void main(String args[]) {

int arr[] = {10, 20, 30, 40, 50};

for(int i=0; i < arr.length; i++)

{

System.out.print(" " + arr[i]);

}

}

}

• A. 10 20 30 40 50

• B. Compiler Error

• C. 10 20 30 40

• D. None of the above

Minimum number of fields in each node of a doubly linked list is ____

• A. 2

• B. 3

• C. 4

• D. 5

A vertex of in-degree zero in a directed graph is called _______

• A. Root vertex

• B. Source vertex

• C. Sink vertex

• D. Articulation point

The elements of a linked list are stored

• A. In a structure

• B. In an array

• C. Anywhere the computer has space for them

• D. In contiguous memory locations

793+4/*

The evaluation of the above postfix expression is

• A. 10

• B. 41

• C. 9

• D. 21

The number of edges in a complete graph of n vertices is_______

• A. n(n+1)/2

• B. n(n-1)/2

• C. n2 /2

• D. n