Operators and Assignments Questions and Answers
In Java programming, Operators and Assignments form the backbone of logical and arithmetic operations. This concept frequently appears in programming questions and answers, particularly Java MCQs featured in company tests by TCS, Infosys, and Wipro. Java provides various operators—arithmetic, relational, logical, and bitwise—that allow developers to manipulate data and control program flow effectively. Understanding operator precedence, associativity, and assignment rules ensures accurate computations and reduces coding errors. Practicing Java programming interview questions with answers on operators and assignments helps students develop problem-solving skills necessary for coding challenges and technical interviews.
Operators and Assignments
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38 questions
11. What will be the output of the program? class SC2 { public static void main(String [] args) { SC2 s = new SC2(); s.start(); } void start() { int a = 3; int b = 4; System.out.print(" " + 7 + 2 + " "); System.out.print(a + b); System.out.print(" " + a + b + " "); System.out.print(foo() + a + b + " "); System.out.println(a + b + foo()); } String foo() { return "foo"; } }
- 9 7 7 foo 7 7foo
- 72 34 34 foo34 34foo
- 9 7 7 foo34 34foo
- 72 7 34 foo34 7foo
12. What will be the output of the program? class Test { static int s; public static void main(String [] args) { Test p = new Test(); p.start(); System.out.println(s); } void start() { int x = 7; twice(x); System.out.print(x + " "); } void twice(int x) { x = x*2; s = x; } }
- 7 7
- 7 14
- 14 0
- 14 14
13. What will be the output of the program? class Two { byte x; } class PassO { public static void main(String [] args) { PassO p = new PassO(); p.start(); } void start() { Two t = new Two(); System.out.print(t.x + " "); Two t2 = fix(t); System.out.println(t.x + " " + t2.x); } Two fix(Two tt) { tt.x = 42; return tt; } }
- null null 42
- 0 0 42
- 0 42 42
- 0 0 0
14. What will be the output of the program? class BoolArray { boolean [] b = new boolean[3]; int count = 0; void set(boolean [] x, int i) { x[i] = true; ++count; } public static void main(String [] args) { BoolArray ba = new BoolArray(); ba.set(ba.b, 0); ba.set(ba.b, 2); ba.test(); } void test() { if ( b[0] && b[1] | b[2] ) count++; if ( b[1] && b[(++count - 2)] ) count += 7; System.out.println("count = " + count); } }
- count = 0
- count = 2
- count = 3
- count = 4
15. What will be the output of the program? public class Test { public static void leftshift(int i, int j) { i <<= j; } public static void main(String args[]) { int i = 4, j = 2; leftshift(i, j); System.out.printIn(i); } }
- 2
- 4
- 8
- 16