Tag: programming languages

What will be printed?my @a = (1, undef, 2);my $sum = 0;foreach my $val (@a) { eval { $sum += foo($val); }; if ($@) { $sum += 100; }}print "$sum\n";sub foo { my $val = shift; die "I don't like undefs" unless defined $val; return $val + $val;}

What will be the value of $keys after execution of the following code? my $var; if (exists $var->{key1}->{key2}) { $var->{key1}->{key2} = 1; } my $keys = keys(%{$var});

What will be printed? BEGIN { print 'a'; } END { print 'b'; } BEGIN { print 'c'; } END { print 'd'; }

What will be printed by the code below? my @a = (0, 1, 2); my ($b) = @a; print $b;

What is the output for the below code ? class A implements Runnable{ public void run(){ System.out.println(Thread.currentThread().getName()); } } public class Test { public static void main(String... args) { A a = new A(); Thread t = new Thread(a); Thread t1 = new Thread(a); t.setName("t"); t1.setName("t1"); t.setPriority(10); t1.setPriority(-3); t.start(); t1.start(); } }

What is the output for the below code ? class A implements Runnable{ public void run(){ System.out.println(Thread.currentThread().getName()); } } 1. public class Test { 2. public static void main(String... args) { 3. A a = new A(); 4. Thread t = new Thread(a); 5. t.setName("good"); 6. t.start(); 7. } 8. }

What is the output for the below code ? public class Test { public static void main(String[] args) { List list = new ArrayList(); list.add(0, 59); int total = list.get(0); System.out.println(total); } }

What is the output for the below code ? public class B { public String getCountryName(){ return "USA"; } public StringBuffer getCountryName(){ StringBuffer sb = new StringBuffer(); sb.append("UK"); return sb; } public static void main(String[] args){ B b = new B(); System.out.println(b.getCountryName().toString()); } }