Which of the following methods waits for the thread to terminate?

Which of these packages contain all the Java's built in exceptions?

Output of the following code? int three = 3; String four = '4'; System.out.println(1 + 2 + three + four);

Which method contains the body of the thread?

Output of the following program? class Upwork { public static void main(String args[]) { try { int a[]={1,2,3,4,5}; for(int i=0;i<7;i++) System.out.println(a[i]); } catch(ArrayIndexOutOfBoundsException e) { System.out.println('0'); } } }

Which is ignored by serialization? (Choose all that apply)

Which statement is true for below code:- String s1 = 'UpWork'; String s2 = 'UpWork'; StringBuilder sb1 = new StringBuilder(); sb1.append('Up').append('Work'); System.out.println(s1 == s2); System.out.println(s1.equals(s2)); System.out.println(sb1.toString() == s1); System.out.println(sb1.toString().equals(s1));

Which class does not override the equals() and hashCode() methods, inheriting them directly from class Object?

Which statement is true about the 'switch' construct?

Which is the valid declaration of a method within an interface definition?

Which is a valid keyword in java?