Explore topic-wise MCQs in Java Programming.

The == operator can be used to compare two String objects. The result is always true if the two strings are identical.

Objects of a subclass can be assigned to a super class reference.

Objects of a super class can always be assigned to a subclass reference.

An individual array element from an array of type int, when passed to a method is passed by value.

An array in the Java programming language has the ability to store many different types of values.

Which three are valid declarations of a char?

1.char c1 = 064770;

2.char c2 = 'face';

3.char c3 = 0xbeef;

4.char c4 = u0022;

5.char c5 = ' iface';

6.char c6 = ' uface';

 public interface Foo { int k = 4; /* Line 3 */ }

Which three piece of codes are equivalent to line 3?

1.final int k = 4;

2.public int k = 4;

3.static int k = 4;

4.abstract int k = 4;

5.volatile int k = 4;

6.protected int k = 4;

Which three are legal array declarations?

1.int [] myScores [];

2.char [] myChars;

3.int [6] myScores;

4.Dog myDogs [];

5.Dog myDogs [7];

Which four options describe the correct default values for array elements of the types indicated?

1.int -> 0

2.String -> "null"

3.Dog -> null

4.char -> ' u0000'

5.float -> 0.0f

6.boolean -> true

consider the statement "x = (a > b) ? a : b"; then the value of x is 27, if a = 18 and b = 27.

Whenever the "&&" operator is used, such as in:
exp1 && exp2
where exp1 and exp2 are boolean expressions, both the boolean expressions are not always evaluated.

The operations y >> 3 and y >>> 3 produce the same result when y > 0.

All bitwise operations are carried out with the same level of precedence in Java.

Declarations must appear at the start of the body of a Java method.

The modulus operator (%) in Java can be used only with variables of integer type.

What is the numerical range of a char?

Which three are valid declarations of a float?

1.float f1 = -343;

2.float f2 = 3.14;

3.float f3 = 0x12345;

4.float f4 = 42e7;

5.float f5 = 2001.0D;

6.float f6 = 2.81F;

Variables declared inside a for loop are limited in scope to the loop.

For the [removed]y >= z && a == b) to be true, at least one of (y >= z) and (a == b) must be true.

A break statement must always be present in the default case of a "switch" selection structure.

The "switch" selection structure must end with the default case.

The [removed]y >= z && a == b) is evaluated by first evaluating the expression y >= z, and then evaluating a == b.