Serial Number: 500 Name: D: Returns 10 and 30 in that order. E: Returns 30 and 30 in that order. Question 19: Consider the following code in Perl: local $x = 10; local $y = 1; sub f { print ("x = $x\n"); if ($y > 0) { 8 (); } sub g { local $x = 20; $y = $y = 1; f (); } f 0)); What will be printed when this program is executed? Recall that Perl uses dynamic scope with variables decla using local. A: x= 10 and x = 20 B: x= 10 and x = 9 C: x= 10 and x = 10 D: x = 10 and x 190 E: x 20 and x = 20
Serial Number: 500 Name: D: Returns 10 and 30 in that order. E: Returns 30 and 30 in that order. Question 19: Consider the following code in Perl: local $x = 10; local $y = 1; sub f { print ("x = $x\n"); if ($y > 0) { 8 (); } sub g { local $x = 20; $y = $y = 1; f (); } f 0)); What will be printed when this program is executed? Recall that Perl uses dynamic scope with variables decla using local. A: x= 10 and x = 20 B: x= 10 and x = 9 C: x= 10 and x = 10 D: x = 10 and x 190 E: x 20 and x = 20
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Scala programming
Transcribed Image Text:}
Name:
Serial Number: 500
D: Returns 10 and 30 in that order.
E: Returns 30 and 30 in that order.
Question 19: Consider the following code in Perl:
local $x = 10;
local $y = 1;
sub f {
print ("x = $x\n");
if ($y > 0) {
8 ();
}
sub g {
local $x = 20;
$y = $y = 1;
f ();
}
f ());
What will be printed when this program is executed? Recall that Perl uses dynamic scope with variables declared
using local.
A: x= 10 and x = 20
B: x= 10 and x = 9
C: x= 10 and x = 10
D: x= 10 and x = 190
E: x 20 and x = 20
Question 20: Consider the Scala code:
val q= List ( (x: Int) => x, (x: Int) => x + 1, (x: Int) => x + 2)
What will happen when (q (2)) (10) is executed?
A: Returns List (10, 11, 12).
B: Returns 12.
C: Returns 33.
D: Returns List (12,12,12).
E: Returns 10.
Question 21: Consider the following Java code:
class A {
static int f (int x) {
return x + 1;
}
![Serial Number: 500
Name:
class B extends A {
static int f (int x) {
return x + 2;
}
}
public class Driver (
public static void main (String[] args) {
A o
new B ();
System.out.println (o.f (10));
}
}
What will happen when this program is executed? HINT: "dynamic dispatch" is not used when calling static
methods.
A: Prints 11.
B: Fails to compile because B is not a subtype of A.
C: Execution stops with Class CastException error.
D: Prints 10.
E: Prints 12.
Question 22: Consider the Scala code:
val q List ( (x: Int) => x, (x: Int) => x + 1, (x: Int) => x + 2)
What is the type of q?
A: List [Int=>Int]
B: Int=>List [Int]
C: Int=>Int
D: List [Int]
E: List [(Int, Int, Int)]
Question 23: Consider the following Scala code:
class Counter {
var n = 0
def update (): Unit = { n = n + 1}
def get ) Int = n
}
class CounterExt extends Counter {
override def update (): Unit = { n = n + 10 }
}
val c1: Counter = new Counter ()
val c2: Counter = new CounterExt ()
c1.update ()
c1.update ()](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F57e74000-fbe3-481d-ab8d-800d62a3b02c%2Fbe7ef019-70dc-484b-8227-04e77e8cfc1d%2Fk8ceqdc_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Serial Number: 500
Name:
class B extends A {
static int f (int x) {
return x + 2;
}
}
public class Driver (
public static void main (String[] args) {
A o
new B ();
System.out.println (o.f (10));
}
}
What will happen when this program is executed? HINT: "dynamic dispatch" is not used when calling static
methods.
A: Prints 11.
B: Fails to compile because B is not a subtype of A.
C: Execution stops with Class CastException error.
D: Prints 10.
E: Prints 12.
Question 22: Consider the Scala code:
val q List ( (x: Int) => x, (x: Int) => x + 1, (x: Int) => x + 2)
What is the type of q?
A: List [Int=>Int]
B: Int=>List [Int]
C: Int=>Int
D: List [Int]
E: List [(Int, Int, Int)]
Question 23: Consider the following Scala code:
class Counter {
var n = 0
def update (): Unit = { n = n + 1}
def get ) Int = n
}
class CounterExt extends Counter {
override def update (): Unit = { n = n + 10 }
}
val c1: Counter = new Counter ()
val c2: Counter = new CounterExt ()
c1.update ()
c1.update ()
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