Java Programming Multiple Choice Questions (MCQs) and Answers

Q1 Which of these is not a feature of Java?

Q2 Which component of Java is responsible for running the compiled Java bytecode?

Q3 What is the purpose of the PATH environment variable in Java?

Q4 Which feature of Java makes it possible to run a Java program on different platforms?

Q5 In Java, how should class names be written?

Q6 Which of these is a single-line comment in Java?

Q7 Which data type would be best for storing a person's age in Java?

Q8 What is the default value of a boolean variable in Java?

Q9 What is the result of this operation in Java:
(int)(7.9)?

Q10 Which keyword is used to define a constant variable in Java?

Q11 What is the range of the short data type in Java?

Q12 What will be the output of the following code snippet:
int a = 10;
int b = 20;
System.out.println(a + b);

Q13 Identify the output of this code:
boolean isJavaFun = true;
System.out.println(!isJavaFun);

Q14 What does the following Java code print?
int x = 5;
int y = x++;
System.out.println(y);

Q15 What is the output of this pseudocode?
SET x = 10
IF x > 5
THEN PRINT "Greater"
ELSE PRINT "Lesser"

Q16 Evaluate this pseudocode:

SET a = 3 SET b = 4 PRINT a * b

Q17 Determine the output:
SET num = 8
IF num MOD 2 = 0
THEN PRINT "Even"
ELSE
PRINT "Odd"

Q18 Identify the error in this code:
int[] nums = new int[2]; nums[0] = 1; nums[1] = 2; nums[2] = 3;

Q19 Spot the mistake in this code snippet:
int i = 0;
while(i < 10) {
i++;
}
System.out.println(i);

Q20 Which control structure is used to execute a block of code multiple times?

Q21 What will be the output of the following code snippet:
if(false){
System.out.println("True");
}
else{
System.out.println("False");
}

Q22 In a 'switch-case' statement, what is the role of the 'break' keyword?

Q23 What is the difference between 'while' and 'do-while' loops in Java?

Q24 Which keyword is used to exit a loop prematurely in Java?

Q25 What will the following loop print?
for(int i = 0;
i < 3;
i++){
System.out.println(i);
}

Q26 What is the output of this code?
int x = 1;
while(x < 4){
System.out.println(x); x++;
}

Q27 What will this pseudocode output?

SET count = 5 DO PRINT count COUNTDOWN count

Q28 Analyze this pseudocode:

SET num = 0 WHILE num <= 5 IF num MOD 2 = 0 THEN PRINT num END IF INCREMENT num

Q29 Identify the error in this code:
for(int i=0;
i<=5;
i++) {
System.out.println(i);
}
System.out.println(i);

Q30 Spot the mistake:
int counter = 0;
while(counter < 5){
counter++;
}
System.out.println("Count: " + counter);