|
No. |
Java Question |
Answer/Output |
Explanation |
|
1 |
new Short ("1.0");
|
No Compile time error. This gives Run Time Exception with NumberFormatException. |
Because floating point values are not acceptable.
|
|
2 |
new Short ("0 x 1"); |
No Compile time error. This gives Run Time Exception with NumberFormatException. |
Because hexadecimal integer integrals are not acceptable. |
|
3 |
new Short ("011"); |
No Compile time error. This gives Run Time Exception with NumberFormatException. |
The argument must be a decimal integer literal. The leading 0 of argument 011 is
ignored and argument is interpreted as decimal integer integral. |
|
4 |
new Short ("+1"); |
No Compile time error. These gives Run Time Exception with NumberFormatException. |
A sign of + or - are not acceptable. |
|
5 |
new Float("A");
new Float ("0 x 10"); |
No Compile time error. This gives Run Time Exception with NumberFormatException. |
A string representation of hexadecimal value is not acceptable.
|
|
6 |
new Float ("1L"); |
No Compile time error. This gives Run Time Exception with NumberFormatException. |
Arguments of the type string cannot contain an integer type suffix l or L. A floating
point suffix F, f, D or d are acceptable but suffix has no impact on result. |
|
7 |
new Float ('A'); |
65.0 |
- |
|
8 |
new Float (1L); |
1.0 |
- |
|
9 |
new Float (0x10); |
16.0 |
- |
|
10 |
new Float ("010"); |
10.0 |
|
|
11 |
Long.parseLong("1L");
Long.parseLong("0x10");
Long.parseLong("1.0");
Long.parseLong("+1"); |
No Compile time error. This gives Run Time Exception with NumberFormatException. |
- |
|
12 |
Long.parseLong("-1"); |
-1 |
- |
|
13 |
new Short("1"); |
1 |
- |
|
14 |
new Short("-1"); |
-1 |
|
|
15 |
new Short("011"); |
11 |
- |
|
16 |
new Short("1.0");
new Short("0x1");
new Short("+1"); |
No Compile time error. This gives Run Time Exception with NumberFormatException. |
- |
|
17 |
Float.toString(1.0); |
Compile Time Error |
Cannot Resolve the symbol |
|
18 |
Float.toString(1.0f); |
1.0 |
- |
|
19 |
Long i1=new long(1);
Long i2=new Long(i1); |
Compile Time Error |
Because there is no constructor that accepts a reference to an instance of type
Long. [The same rule applies for Double and Integer] |
|
20 |
Boolean b1=Boolean.valueOf(true);
Boolean b2=Boolean.valueOf(true);
SOP(b1==b2); |
True |
Boolean class contains 2 public static final Boolean instances: Boolean.FALSE wraps
primitive boolean value false; Boolean.TRUE wraps primitive boolean value true.
Depending on the value of the argument, Boolean valueOf method returns a reference
to either Boolean.FALSE or Boolean.TRUE. Reference variables b1 and b2 are both
initialized with a reference value returned by method invocation expression Boolean.valueOf(true).
So, b1==b2 is true. |
|
21 |
Boolean b1=Boolean.valueOf(true);
Boolean b2=Boolean.valueOf("true");
SOP(b1==b2); |
True |
Same as above. |
|
22 |
Boolean b1=new Boolean(true);
Boolean b2=new Boolean(true);
SOP(b1==b2); |
false |
- |
|
23 |
Double a=new Double(0xFFFF);
byte b=a.byteValue(); |
-1 |
- |
|
24 |
Double a=new Double(0xFFFF);
short c=a.shortValue(); |
-1 |
- |
|
25 |
Double a=new Double(0xFFFF);
char ch=a.shortValue(); |
Compile Time Error |
- |
|
26 |
byte b1=11;
SOP(
new Integer(b1).equals(new Integer(b1))); |
True |
- |
|
27 |
byte b1=11;
SOP(
new Integer(b1).equals(new Short(b1))); |
False |
- |
|
28 |
byte b1=11;
SOP(
new Integer(b1).equals(new Byte(b1))); |
False |
- |
|
29 |
Integer a = new Integer("078");
SOP(a); |
78 |
- |
|
30 |
Integer a = new Integer("078");
SOP(b.intValue(a)); |
78 |
- |
|
31 |
Boolean b1 = new Boolean ("TRUE");
Boolean b2 = new Boolean ("true");
Boolean b3 = new Boolean ("AAAA");
SOP(b1 + b2 + b3); |
Compile Time Error |
Because + cannot be applied to Boolean. |
|
32 |
Boolean b1 = new Boolean ("TRUE");
Boolean b2 = new Boolean ("true");
Boolean b3 = new Boolean ("AAAA");
SOP(" "+ b1 + b2 + b3); |
truetruefalse |
- |
|
33 |
Boolean b1 = new Boolean ("TRUE");
Boolean b2 = new Boolean ("true");
Boolean b3 = new Boolean ("AAAA");
SOP((b1 + b2 + b3).toString()); |
Compile Time Error |
- |
|
34 |
Double a = new Double(Double.NaN);
Double b = new Double(Double.NaN);
SOP(a.equals(b)); |
True |
- |
|
35 |
SOP(Double.NaN = =Double.NaN); |
False |
- |
|
36 |
Integer i =new Integer (42);
Double d = new Double (42.0);
SOP(i.equals(d)); |
False |
- |
|
37 |
Integer i =new Integer (42);
Double d = new Double (42.0);
SOP(d.equals(i)); |
False |
- |
|
38 |
Integer i =new Integer (42);
Double d = new Double (42.0);
SOP(i.equals(42)); |
Compile Time Error |
- |
|
39 |
Integer i =new Integer (42);
Double d = new Double (42.0);
SOP(d.equals(42)); |
Compile Time Error |
- |
|
40 |
Integer i =new Integer (42);
Double d = new Double (42.0);
SOP(d.equals(42.0)); |
Compile Time Error |
- |
|
41 |
Integer i =new Integer (42);
Double d = new Double (42.0);
SOP(i.equals(42.0)); |
Compile Time Error |
- |
|
42 |
Integer i =new Integer (42);
Double d = new Double (42.0);
SOP(i= =d); |
Compile Time Error
|
Incomparable Types. |
|
43 |
Float f = new Float(32D);
SOP(f); |
32.0 |
- |
|
44 |
byte a = 10;
Byte b = new Byte(a);
Byte c = new Byte((byte)11);
SOP(b.compareTo(c)); |
-1 |
- |
|
45 |
Boolean b1 = new Boolean("TRUE");
Boolean b2 = new Boolean("True");
Boolean b3 = new Boolean("false");
SOP(b1+b2+b3); |
Compile Time Error |
+ cannot be applied to java.lang.Boolean |
|
46 |
Boolean b1 = new Boolean("TRUE");
Boolean b2 = new Boolean("True");
Boolean b3 = new Boolean("false");
SOP(""+b1+b2+b3); |
TRUETruefalse |
- |
|
47 |
Boolean b1 = new Boolean("TRUE");
Boolean b2 = new Boolean("True");
Boolean b3 = new Boolean("false");
SOP(b1+b2+b3)).toString()); |
Compile Time Error |
- |
|
48 |
Boolean a = new Boolean(true);
Boolean b = new Boolean(false);
SOP(a+b); |
Compile Time Error |
+ cannot be applied to Boolean |
|
49 |
Boolean a = new Boolean(true);
Boolean b = new Boolean(false);
SOP((a+b).toString()); |
Compile Time Error |
- |
|
50 |
Boolean a = new Boolean(true);
Boolean b = new Boolean(false);
SOP(""+a+b); |
truefalse |
- |
|
51 |
Boolean a = new Boolean(true);
Boolean b = new Boolean(false);
SOP(a+""+b); |
truefalse |
- |
|
52 |
Boolean b = new Boolean(java);
SOP(b); |
Compile Time Error |
Cannot resolve symbol |
