Tag: java

Quizzes (35) Questions (265)

Questions Related to java

Multiple choice java

Syntax of System.arraycopy method??

System.arraycopy(fromarray,frominden,toarray,toindex,count);
System.arraycopy(toarray,toinden,fromarray,fromindex,count);
System.arraycopy(fromarray,toarray,count);
System.arraycopy();

Reveal answer Fill a bubble to check yourself

Multiple choice java

String name="ALIEN"; name.reverse();
Is code successfully compiled..???

True
False

Reveal answer Fill a bubble to check yourself

Multiple choice java

int x = 10;
do {
 x--;
} while (x &lt; 10);

How many times the loop will be executed?

ten times
zero times
one to nine times
more than ten times

Reveal answer Fill a bubble to check yourself

Multiple choice java

int x = 0;
int y = 10;
do {
 y--;
 ++x;
} while (x &lt; 5);
System.out.print(x + "," + y);

What is the result?

Reveal answer Fill a bubble to check yourself

Multiple choice java

public static void main(String[] args) {
 Integer i = new Integer(1) + new Integer(2);
 switch (i) {
  case 3:
   System.out.println("three");
   break;
  default:
   System.out.println("other");
   break;
 }
}

What is the output?

three
other
Compilation Fails
Exception

Reveal answer Fill a bubble to check yourself

Multiple choice java

String[] elements = {
 "for",
 "tea",
 "too"
};
String first = (elements.length &gt; 0) ? elements[0] : null;

What is the result?

Compilation fails
An exception is thrown at runtime
The variable first is set to null
The variable first is set to elements[0]

Reveal answer Fill a bubble to check yourself

Multiple choice java

public class CreditCard {
 private String cardID;
 private Integer limit;
 public String ownerName;
 public void setCardInformation(String cardID, String ownerName, Integer limit) {
  this.cardID = cardID;
  this.ownerName = ownerName;
  this.limit = limit;
 }
}

Which statement is true?

The class is fully encapsulated
The code demonstrates polymorphism
The ownerName variable breaks encapsulation
The cardID and limit variables break polymorphism

Reveal answer Fill a bubble to check yourself

Multiple choice java

int x = 12;
while (x &lt; 10) {
    x--;  
}  
System.out.print(x);

What is the result?

0
10
12
print statement never be executed

Reveal answer Fill a bubble to check yourself

Multiple choice java

System.out.format("Pi is approximately %d.", Math.PI); What is the result?

Compilation fails
Pi is approximately 3
Pi is approximately 3.141593
An exception is thrown at runtime

Reveal answer Fill a bubble to check yourself

Multiple choice java

NumberFormat nf = NumberFormat.getInstance(); nf.setMaximumFractionDigits(4);
nf.setMinimumFractionDigits(2);  
String a = nf.format(3.1415926);
String b = nf.format(2);

Which statement is true about the result?

The value of b is 2
The value of b is 2.00
The value of a is 3.1415
The value of a is 3.141

Reveal answer Fill a bubble to check yourself

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