Java interview questions

1. Method overloading:

Options:
a. Compile time exception
b. Run rime exeption
c. String-null
d. Integer-null
Ans: a

2. How to find sum of an array?

Sol:

Output:

Sum of an array is: 150
Lenght of an array is: 5

3: Which of the following access specifier makes a declaration that is accessible to itself?

a. public
b. private
c. protected
d. privately
Ans: b

4: Which of the following statement is true with respect to class and members of a class?

a. It is mandatory for every class to declare a main method inside it.
b. It is mandatory to specify return type along with method definition in a class.
c. It is mandatory to initiate member variables while declaring them in a class.
d. It is mandatory to use an access specifier along with declaring statement of a member variable.
Ans: Will reveal soon.

5: What is the output of below code?

a. output is: zero
output is: one
b. Runtime error
c. output is: zero
output is: one
output is: null
output is: null
d. Compilation error
Ans: C

6: What is the output of below code?


Options:

a. output is: zero
output is: one
b. Compilation error
c. Runtime error
d. ArrayIndexOutOfBounds Exception

Ans: a

7. Write a code to find the sum of numbers between two given positions in an array.

Ans:

Ans:

Array length is: 20
n1 position is: 4
n1 position is: 14
Total sum is: 450

8. Write a code to find out first max number and then first minimum number and so on in a sorted/unsorted array?

Sol:

 

9. What is the output for below code snippet?

Options:

a. 10 20
b. 20 40
c. 10 40
d. 20 80

Ans: c

10. What is the output of below code snippet? String manipulations.

Options:

a. First Second
b. Selenium99
c. First Second Selenium99
d. Selenium99 First Second

Ans:

b

10.1. Find the output. String manipulations.

Options:

a. false

b. true

c. SELENIUM99

d. selenium99

 

Ans: c

 

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