What is the result?()
A.7
B.49
C.343
D.Compilation fails.
E.An exception is thrown at runtime.
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Which code fragment, inserted at line 23, allows the code to compile?()
A.df = new DateFormat();
B.df = Date.getFormat();
C.df = date.getFormat();
D.df = DateFormat.getFormat();
E.df = DateFormat.getInstance();
Given:
1.d is a valid, non-null Date object
2.df is a valid, non-null DateFormat object set to the current locale
What outputs the current locale’s country name and the appropriate version of d’s date?()
A.Locale loc = Locale.getLocale(); System.out.println(loc.getDisplayCountry()+ " " + df.format(d));
B.Locale loc = Locale.getDefault(); System.out.println(loc.getDisplayCountry()+ " " + df.format(d));
C.Locale loc = Locale.getLocale();System.out.println(loc.getDisplayCountry()+ " " + df.setDateFormat(d));
D. Locale loc = Locale.getDefault();System.out.println(loc.getDisplayCountry()+ " " + df.setDateFormat(d));
Which two code fragments, inserted independently at line 3, generate the output 4247?()
A. String s = "123456789"; s = (s - "123").replace(1, 3, "24") - "89";
B. StringBuffer s = new StringBuffer("123456789");s.delete(0, 3).replace(1, 3, "24").delete(4, 6);
C. StringBuffer s = new StringBuffer("123456789"); s.substring(3, 6).delete(1,3).insert(1, "24");
D. StringBuilder s = new StringBuilder("123456789");s.substring(3, 6).delete(1, 2).insert(1, "24");
E. StringBuilder s = new StringBuilder("123456789"); s.delete(0, 3).delete(1, 3).delete(2, 5).insert(1, "24");
What is the result?()
A.three
B.other
C.An exception is thrown at runtime.
D.Compilation fails because of an error on line 12.
E.Compilation fails because of an error on line 13.
F.Compilation fails because of an error on line 15.
What is the result?()
A.The value "4" is printed at the command line.
B.Compilation fails because of an error in line 5.
C.Compilation fails because of an error in line 9.
D.A NullPointerException occurs at runtime.
E.A NumberFormatException occurs at runtime.
F.An IllegalStateException occurs at runtime.
Which code fragment, inserted at line 24, outputs "123abc 123abc"?()
A.sb1.append("abc"); s1.append("abc");
B.sb1.append("abc"); s1.concat("abc");
C.sb1.concat("abc"); s1.append("abc");
D.sb1.concat("abc"); s1.concat("abc");
E.sb1.append("abc"); s1=s1.concat("abc");
F.sb1.concat("abc"); s1=s1.concat("abc");
Which code, inserted at line 14, sets the value of b to 314.159,26?()
A.b=nf.parse(input);
B.b=nf.format(input);
C.b=nf.equals(input);
D.b=nf.parseObject(input);
Given a vaid DateFormat object named df, and
What updates d’s value with the date represented by ds?()
A.18.d=df.parse(ds);
B.18.d=df.getDate(ds);
C.18.try{19.d=df.parse(ds);20. }catch(ParseException e){ }
D.18.try{19.d=df.getDate(ds);20. }catch(ParseException e){ }
A.String s = c.readLine();
B.char[ ] c = c.readLine();
C.String s = c.readConsole();
D.char[ ] c = c.readConsole();
E.String s = c.readLine("%s", "name ");
F.char[ ] c = c.readLine("%s", "name ");
A.Objects from classes that use aggregation cannot be serialized
B.An object serialized on one JVM can be successfully deserialized on a different JVM
C.The values in fields with the volatile modifier will NOT survive serialization and deserialization
D.The values in fields with the transient modifier will NOT survive serialization and deserialization
E.It is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable
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