Java Basics Questions Series 3rd, Java Basics Question and Answers

There is labled and enhanced for loop in java

There is no structure and union in java

Abstraction hides complexity

which of the following classes are available in the java.lang package?

Which programming language is considered the first object-oriented programming language?

Who is known as the founder of java

We can provide explicit security by

System.out.println(12>>2); What is the output

We can have any number of classes in a java source file.

Java is an acronym

Which methods can access to private attributes of a class?

Which of these are not legal identifiers. Select the four correct answers.
a. 1alpha
b. _abcd
c. xy+abc
d. transient
e. account-num
f. very_long_name

Is the following statement true or false. The constructor of a class must not have a return type.

What is an aggregate object?

Which of the following are keywords in Java. Select the two correct answers.
a. friend
b. NULL
c. implement
d. synchronized
e. throws

What gets printed when the following program is compiled and run? Select the one correct answer.
class test {
public static void main(String args[]) {
int i;
do {
i++;
}
while(i < 0);
System.out.println(i);
}
}

Which of these are interfaces in the collection framework. Select the two correct answers.
a. Set
b. List
c. Array
d. Vector
e. LinkedList

Which of the following are legal declaration and definition of a method. Select all correct answers.
a. void method() {};
b. void method(void) {};
c. method() {};
d. method(void) {};
e. void method {};

What happens when the following code is compiled and run. Select the one correct answer.

for(int i = 1; i < 3; i++)
for(int j = 3; j >= 1; j–)
assert i!=j : i;

Which of the assignment are not valid.