SCJP String free sample questions

70)

if(0.0 == -0.0) {
System.out.println("true");
}
else{
System.out.println("false");
}

prints false

prints true

Explanation:
No Explanation available

Ans: 2

71)

class C {
public static void main(String[] args) {
double d1 = Math.floor(0.5);
double d2 = Math.floor(1.5);
System.out.print(d1 + "," + d2);
}}

Prints: 0.0,1.0

Prints: 0.0,2.0

Prints: 1.0,1.0

Prints: 1.0,2.0

None of the above

Explanation:
No Explanation Available

Ans: 1

72)

System.out.println("String".substring(0,4));
This statement will Print

will print "Strin"

will print "Stri"

will cause compiler error

none of the above

Explanation:
No Explanation Available

Ans: 2

73)

if("String".replace('t','T') == "String".replace('t','T'))
System.out.println("Equal");
else
System.out.println("Not Equal");

will Print Equal

will Print Not Equal

compile time error

none of the above

Explanation:
No Explanation Available

Ans: 2

74)

Which of the following classes will not allow unsynchronized read operations by multiple threads?

Vector

TreeMap

TreeSet

HashMap

HashSet

Explanation:
No Explanation Available

Ans: 1

75)

StringBuffer objects once created can not be modified

true

false

Explanation:
No Explanation available

Ans: 2

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