Java MCQ's on Fundamentals Of Java

This test contains 10 questions based on Fundamentals Of Java. Each question answered correctly awards you 1 point and each incorrect answer has a penalty of -0.25 points, no points are deducted for unattempted answers.

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You Get +1 for each correct answer and -0.25 for each incorrect answer

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Which of the following is not a conditional statement.

while	if
for	do while

B

if is the conditional statement out of these all the others are the loops.

Which of the following is not a keyword in java.

volatile	clazz
private	transient

B

clazz is not a keyword in java.

Which of the following is not an Object.

Integer	Boolean
String	char

D

char is not an object, it is a primitive datatype.

Which of these is invalid.

char A = 1	char A = 'A'
char A = "A"	Both A and C

C

"A" represents a string thus this is wrong. Option A is correct because char can be assigned an a positive integer value.

Which of the following is the parent class of all the classes.

Lang	Object
Java	None of these

B

Object class is the parent class of all the classes in java.

Can we force garbace collection in Java.

Yes

No

B

No we cannot force garbage collection in java. We can only tell JVM that a particular object is ready for garbage collection

Which of the following is not a type of variable.

transient	volatile
native	final

C

native is not a type of a variable. All the others are valid for a variable in java.

How many diffrent values can an integer have in java.

28	216
232	264

C

An integer can have 2³² different values in java. An integer is of 4 bytes that means 2⁸4 = 2³² (Also 1 byte = 8 bits )

What will be the output of the following program.

class A{
   public static void main(String args[]){
      char a = 1;
      int n = 1;
      System.out.println(a == n);
   }
}

Compilation Error	true
false	None of these

B

The above code will print true, because the char value of a is equal to integer value of n.

Which of the following is an invalid in java

a = ++a;	a -= --a;
a %= a;	None of these

D

All of the above are correct.

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