Multiple Choice Question

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Submitted by c-admin on Tue, 05/28/2019 - 03:53

QID:

126

Type:

Multiple Choice Question

Category:

Java Programmer I

Tags:

Operators and Scopes

Question:

Which of the following statements will compile without any error?

Select 4 options

A. System.out.println("a"+'b'+63);
B. System.out.println("a"+63);
C. System.out.println('b'+new Integer(63));
D. String s = 'b'+63+"a";
E. String s = 63 + new Integer(10);

Answer and Explanation (Click to expand)

Answer:

A, B, C, D

Explanation:

+ is overloaded such that if any one of its two operands is a String then it will convert the other operand to a String and create a new string by concatenating the two.

Therefore, in 63+"a" and "a"+63, 63 is converted to "63" and 'b' +"a" and "a"+'b', 'b' is converted to "b".

Note that in 'b'+ 63, 'b' is promoted to an int i.e. 98 giving 161.

Q&A Set:

Set 12

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