Coding Titans

What will be the output for the following code?

String [ ] arr = { "I ", "am ", "memberof ", "acm ", "ieee " };

System.out.println(arr[5]);

• acm

• ieee

• ArrayIndexOutOfBoundsException

• I am memberof acm ieee

What is the output of the following code?

String competition = null;

System.out.println(competition.length());

• 4

• Error: NullPointerException

• null

• 0

Which loop is generally used when the number of iterations is known beforehand?

• for

• while

• do-while

• foreach

Which data structure is a LIFO (Last In, First Out)?

• Queue

• Stack

• Array

• Linked list

In which of the following cases is automatic type conversion possible ?

• byte to int

• long to int

• int to long

• short to int

What is the output of the following code?

int x = 125; x++; x++; x--; x++; --x; --x; ++x; x++;

System.out.println(x++);

• 127

• 125

• 128

• God Knows

When passing arrays to methods, what is passed to the methods?

• Reference of the array

• Copy of the array

• The array itself

• Length of the array

What is the output of the following code?

String str1 = "Coding "; String str2 = "Titans";

System.out.println(str1.concat(str2));

• Titans 😟

• Coding Titans 😎

• Titans Coding 😅

• Coding 🙃

Fix the Error:

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

int sum = 0;

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

{ sum += arr[i]; }

Fix the Error:

int n = 5;

int factorial = 1;

for (int i = 1; i <= n; i--) {

factorial *= i;

}