Operators(Computer Science > Java Program ) Questions and Answers
Question 1. Int x = 0, y = 0 , z = 0 ; x = (++x + y-- ) * z++; What will be the value of "x" after execution ?
-2
-1
0
1
2
Explanation:-
Answer: Option C. -> 0
Question 2. Int ++a = 100 ; System.out.println( ++a ) ; What will be the output of the above fraction of code ?
100
Displays error as ++a is not enclosed in double quotes in println statement
Compiler displays error as ++a is not a valid identifier
None of these
Explanation:-
Answer: Option C. -> Compiler displays error as ++a is not a valid identifier
Question 3. What is the output of the following program ? class Numbers{ public static void main(String args[]){ int a=20, b=10; if((a < b) && (b++ < 25)){ System.out.println("This is any language logic"); } System.out.println(b); } }
12
11
10
Compilation Error
Explanation:-
Answer: Option C. -> 10
Question 4. Select from among the following character escape code which is not available in Java.
\t
\r
\a
\\
\v
Explanation:-
Answer: Option C. -> \a
Question 5. What will be the output? if(1 + 1 + 1 + 1 + 1 == 5){ System.out.print("TRUE"); } else{ System.out.print("FLASE"); }
TRUE
FALSE
Compiler Error
None of these
Explanation:-
Answer: Option A. -> TRUE
Question 6. Which of the following is the correct expression that evaluates to true if the number x is between 1 and 100 or the number is negative?
Question 7. Public class Test{ public static void main(String args[]){ System.out.print(""==""); System.out.print(" "); System.out.print("A"=="A"); System.out.print(" "); System.out.print("a==A"); } }
"==" A"=="A a==A
true true false
true true a==A
Compilation Fails
None of the above
Explanation:-
Answer: Option C. -> true true a==A
Question 8. What will be the output? public class Test{ public static void main(String args[]){ int a = 42; double b = 42.25; System.out.print((a%10)+" "+(b%10)); } }
42 42.5
2 2.5
4.2 4.225
2 4.225
Compilation Error
Explanation:-
Answer: Option B. -> 2 2.5
Question 9. What will be the output after compiling and running following code? 1. public class Test{ 2. public static void main(String... args){ 3. int x =5; 4. x *= 3 + 7; 5. System.out.println(x); 6. } 7. }
22
50
10
Compilation fails with an error at line 4
None of these
Explanation:-
Answer: Option B. -> 50
Question 10. Determine output: public class Test{ public static void main(String... args){ int a=5 , b=6, c=7; System.out.println("Value is "+ b + c); System.out.println(a + b + c); System.out.println("String " + (b+c)); } }