Explore topic-wise MCQs in Java Programming.

This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Java Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the output of this program?

 class Average {
 public static void main(String args[])
 {
 double number[] = {5.5, 10.1, 11, 12.8, 56.9, 2.5};
 double res;
 res = 0;
 for (int i = 0; i < 6; ++i) 
 {
 res = res + number[i];
 }
 System.out.print(res/6);
 
 } 
 }
A. 16.34
B. 16.566666644
C. 16.46666666666667
D. 16.46666666666666
E. NA
Answer» D. 16.46666666666666
Discussion
2.

What is the output of this program?
public class increment {
 public static void main(String args[]) {
 int a = 5;
 System.out.print(++a * 6);
 }
}
A. 36
B. 25
C. 30
D. 40
E. 12
Answer» B. 25
Discussion
3.

What is the output of this program?

 class area {
 public static void main(String args[]) 
 { 
 double r, pi, a;
 r = 6.8;
 pi = 3.14;
 a = pi * r * r;
 System.out.println(a);
 } 
 }
A. 142.1935
B. 145.1936
C. 140.236
D. 145.2936
E. 145
Answer» C. 140.236
Discussion
4.

What will be the output of these statement?

class output {
 public static void main(String args[]) 
 {
 double p, q, r;
 p = 3.0/0;
 q = 0/4.0;
 r = 0/0.0;
 
 System.out.println(p);
 System.out.println(q);
 System.out.println(r);
 } 
 }
A. 0.0
B. Infinity
C. NaN
D. all of the mentioned
E. None of these
Answer» E. None of these
Discussion
5.

What is the output of this program?

class output {
 public static void main(String args[]) 
 {
 boolean var11 = true;
 boolean var12 = false;
 if (var12)
 {
 System.out.println(var12);
 }
 else
 {
 System.out.println(var11);
 }
 } 
 }
A. 0
B. false
C. true
D. 1
E. None of these
Answer» C. true
Discussion
6.

What is the output of this program?

 class output {
 public static void main(String args[]) 
 {
 char a = 'A';
 a++;
 System.out.print((int)a);
 } 
 }
A. 61
B. 64
C. 65
D. 63
E. 66
Answer» F.
Discussion
7.

What is the output of this program?

 class array_output {
 public static void main(String args[]) 
 { 
 char array_variable [] = new char[10];
 for (int i = 0; i < 10; ++i) {
 array_variable[i] = 'j';
 System.out.print(array_variable[i] + "" );
 i++;
 }
 } 
 }
A. i i i i i
B. 0 1 2 3 4
C. i j k l m
D. j j j j j
E. None of the mentioned
Answer» E. None of the mentioned
Discussion
8.

What is the output of this program?

 class output {
 public static void main(String args[]) 
 {
 char var11 = 'A';
 char var12 = 'a';
 System.out.println((int)var11 + " " + (int)var12);
 } 
 }
A. 162
B. 67 95
C. 65 97
D. 66 98
E. None of these
Answer» D. 66 98
Discussion
9.

What is the output of this program?

 class booloperators {
 public static void main(String args[]) 
 {
 boolean var11 = true;
 boolean var12 = false;
 System.out.println((var11 & var12));
 } 
 }
A. 0
B. true
C. false
D. 1
E. None of these
Answer» D. 1
Discussion
10.

What is the output of below code snippet?

enum Enums
{
 D, E, F;
 
 private Enums()
 {
 System.out.println(20);
 }
}
 
public class MainClass
{
 public static void main(String[] args)
 {
 Enum en = Enums.E;
 }
}
A. Runtime Exception
B. 20
C. Compilation Error
D. 10
E. None of these
Answer» C. Compilation Error
Discussion
11.

What is the output of below code snippet?

 enum Levels 
{
 private BOTTOM,
 
 public MEDIUM,
 
 protected TOP;
}
A. Runtime Error
B. EnumNotDefined Exception
C. Compilation Error
D. It runs successfully
E. None of these
Answer» D. It runs successfully
Discussion
12.

What is the output of below code snippet?

class Z
{
 
}
 
enum Enums extends Z
{
 DCB, FEG, HIJ, LMN;
}
A. Compilation Error
B. Runtime Error
C. It runs successfully
D. EnumNotDefined Exception
E. None of these
Answer» B. Runtime Error
Discussion
13.

What will ordinal() method provide?

enum Season {
 WINTER, SPRING, SUMMER, FALL
 };
 System.out.println(Season.WINTER.ordinal());
A. 1
B. 0
C. 3
D. 2
E. -1
Answer» C. 3
Discussion
14.

Which of the following are legal lines of Java code?
1. int a = (int)888.8;
2. byte b = (byte)100L;
3. long c = (byte)100;
4. byte d = (byte)100L;
A. 1 and 2
B. 2 and 3
C. 3 and 4
D. All statements are correct.
E. NA
Answer» E. NA
Discussion
15.

Which of the below data type doesn t support overloaded methods for +,-,* and /?

A. BigDecimal
B. double
C. float
D. int
E. None of these
Answer» B. double
Discussion
16.

What will ordinal() method provide?

A. 1
B. 0
C. 3
D. 2
E. -1
Answer» C. 3
Discussion
17.

What is the replacement of joda time library in java 8?

A. java.joda
B. java.date (JSR-310)
C. java.jodaTime
D. java.time (JSR-310)
E. None of these
Answer» E. None of these
Discussion
18.

How to get difference between two dates?

A. Time diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();
B. Date diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();
C. long diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();
D. long diffInMilli = java.time.difference(dateTime1, dateTime2).toMillis();
E. None of these
Answer» D. long diffInMilli = java.time.difference(dateTime1, dateTime2).toMillis();
Discussion
19.

How is Date stored in database?

A. java.util.Date
B. java.sql.Date
C. java.sql.DateTime
D. java.util.DateTime
E. None of these
Answer» C. java.sql.DateTime
Discussion
20.

What will be the output of these statement?

A. 0.0
B. Infinity
C. NaN
D. all of the mentioned
E. None of these
Answer» E. None of these
Discussion
21.

Which of the following are legal lines of Java code?

A. 1 and 2
B. 2 and 3
C. 3 and 4
D. All statements are correct.
E. NA
Answer» E. NA
Discussion