Java standard test 11 Code 1Z 829

Question: Given:

public static void createFile(String name) throws Exception{
try (
OutputStream os = new FileOutputStream(name); ) {

//INSERT CODE HERE

//flush and close the streams that are open
}

}

Which of the following combinations of the lines of code and their outcome when inserted above, are correct?

Select 2 option(s)

Question: Given the following code:

List aList = List.of(40, 30, 20); //1
List bList = List.copyOf(aList); //2

bList.sort((Integer::compare)); //3
System.out.println( bList ); //4

aList.sort((Integer::compare)); //5
System.out.println( aList ); //6

Identify correct statement.

Select 1 option(s)

Question: What will the following program print?

class LoopTest{
public static void main(String args[]) {
var counter = 0;
outer:
for (var i = 0; i < 3; i++) {
middle:
for (var j = 0; j < 3; j++) {
inner:
for (var k = 0; k < 3; k++) {
if (k - j > 0) {
break middle;
}
counter++;
}
}
}
System.out.println(counter);
}
}

Select 1 option(s)

Question: What will the following code print when compiled and run?

public class TestClass{
public static void main(String[] args){
int[] arr = { 1, 2, 3, 4, 5, 6 };
int counter = 0;
for (var value : arr) {
if (counter >= 5) {
break;
} else {
continue;
}
if (value > 4) {
arr[counter] = value + 1;
}
counter++;
}
System.out.println(arr[counter]);
}

}

Select 1 option(s)

Question: What will be the output when the following code is compiled and run?

//in file Test.java
class E1 extends Exception{ }
class E2 extends E1 { }
class Test{
public static void main(String[] args){
try{
throw new E2();
}
catch(E1 e){
System.out.println("E1");
}
catch(Exception e){
System.out.println("E");
}
finally{
System.out.println("Finally");
}
}
}

Select 1 option(s)

Question: Given the following code:

var raf = new RandomAccessFile("c:\\temp\\test.txt", "rwd");
raf.writeChars("hello");
raf.close();

Which of the following statements are correct?

(Assume that the code has appropriate security permissions.)

Select 1 option(s)

Question: What will the following code print when compiled and run?

var nameList = new ArrayList();
nameList.add("Ally");
nameList.add("Billy");
nameList.add("Cally");
nameList.add("Billy");
nameList.add("Ally");

var nameSet1 = new HashSet();
for(var name:nameList) nameSet1.add(name);
var nameSet2 = new HashSet(nameList);
System.out.println(nameList.size()+" "+nameSet1.size()+" "+nameSet2.size());

Select 1 option(s)

Question: What will the following code print when compiled and run?

Select 1 option(s)

Question: The following program will print

java.lang.ArithmeticException: / by zero

class Test{
public static void main(String[] args){
int d = 0;
try{
int i = 1 / (d* doIt());
} catch (Exception e){
System.out.println(e);
}
}
public static int doIt() throws Exception{
throw new Exception("Forget It");
}
}

Select 1 option(s)

Question: Given that Book is a valid class with appropriate constructor and getTitle and getPrice methods that return a String and a Double respectively, what will the following code print?

List books = Arrays.asList(
new Book("Gone with the wind", 5.0),
new Book("Gone with the wind", 10.0),
new Book("Atlas Shrugged", 15.0)
);
books.stream().collect(Collectors.toMap((b->b.getTitle()), b->b.getPrice()))
.forEach((a, b)->System.out.println(a+" "+b));

Select 1 option(s)

Question: What will the following code print when compiled and run:

public class TestClass {

public static void main(String[] args){
var k = 2;
while(--k){
System.out.println(k);
}
}
}

Select 1 option(s)

Question: Identify correct statements about java.io.Console class?

Select 1 option(s)

Question: Identify correct statements about Java exceptions.

Select 1 option(s)

Question: You are writing a piece of code that determines tax rate on a given grossIncome. The tax rate is to be computed as follows -

If grossIncome is less than or equals to 18000, taxRate is 0.
If grossIncome is more than 18000 but less than or equal to 36000, taxRate is 10%
If grossIncome is more than 36000, taxRate is 20%.

Which of following code fragments do it correctly?

Select 3 option(s)

Question: What will the following code print when compiled and run?

record Student(int id, String... subjects) {
public Student{
if(id<0) throw new IllegalArgumentException();

if( subjects == null || subjects.length == 0) {
subjects = new String[] {"english" };
}
}
}

public class TestClass{

public static void main(String[] args) {
Student s = new Student(123, null);
System.out.println(s);
}
}

Select 1 option(s)

Question: What will the following code print?

Duration d = Duration.ofDays(1);
System.out.println(d);
d = Duration.ofMinutes(0);
System.out.println(d);
Period p = Period.ofMonths(0);
System.out.println(p);

Select 1 option(s)

Question: What will the following code print when compiled and run?

var tickers = List.of("A", "D", "E", "C", "A");
var ratio = List.of(1.0, 1.2, 1.5, 1.8, 2.0);
var map1 = IntStream.range(0, tickers.size())
.boxed()
.collect(Collectors.toMap(
i -> tickers.get(i),
i -> 1.0/ratio.get(i), (x, y) -> x+y)) ; //<<----- LINE 1

var map2 = map1.entrySet().stream().sorted(Map.Entry.comparingByKey())
.collect(
Collectors.toMap(
Map.Entry::getKey,
Map.Entry::getValue,
(x, y) -> x-y,
LinkedHashMap::new)
); //<<----- LINE 2

map2.forEach((var k, var v)->System.out.printf("%s = %.2f\n",k, v));

Select 1 option(s)

Question: What will the following program print when run?

public class ChangeTest {

private int myValue = 0;

public void showOne(int myValue){
myValue = myValue;
System.out.println(this.myValue);
}

public void showTwo(int myValue){
this.myValue = myValue;
System.out.println(this.myValue);
}
public static void main(String[] args) {
var ct = new ChangeTest();
ct.showOne(100);
ct.showTwo(200);
}
}

Select 1 option(s)

Question: What will the following code snippet print?

List s1 = new ArrayList( );
try{
while(true){
s1.add("sdfa");
}
}catch(RuntimeException e){
e.printStackTrace();
}

System.out.println(s1.size());

Select 1 option(s)

Question: Which is the earliest line in the following code after which the object created on line // 1 can be garbage collected, assuming no compiler optimizations are done?

public class NewClass{
private Object o;
void doSomething(Object s){ o = s; }

public static void main(String args[]){
Object obj = new Object(); // 1
NewClass tc = new NewClass(); //2
tc.doSomething(obj); //3
obj = new Object(); //4
obj = null; //5
tc.doSomething(obj); //6
}
}

Select 1 option(s)

Question: Which statements about the following code are correct?

interface House{
public default String getAddress(){
return "101 Main Str";
}
}

interface Office {
public default String getAddress(){
return "101 Smart Str";
}
}

class HomeOffice implements House, Office{
public String getAddress(){
return "R No 1, Home";
}
}

public class TestClass {

public static void main(String[] args) {
House h = new HomeOffice(); //1
System.out.println(h.getAddress()); //2
}
}

Select 1 option(s)

Question: Checked exceptions are meant for...

Select 1 option(s)

Question: Identify correct statements about the following code:

import java.util.*;

class Student{
int marks;
}

class TestClass {
var k = new Student(); //1

public static void main(String[] args) {

var s = new Student(){ //2
@Override
public String toString(){ return "student obj"; };
};

var slist = Set.of(new Student()); //3

for(var i : slist){ //4
System.out.println(i);
}

slist.removeIf((var s1) -> s1.marks<0); //5
}
}

Select 1 option(s)

Question: Given:

class T extends Thread
{
public static Lock lock = new ReentrantLock();

public T(String name){ super(name); }

static StringBuilder data = new StringBuilder();

public void run()
{
if(lock.tryLock()){
try{
lock.lock();
data.append("hello");
}finally{
lock.unlock();
}
}
}
}
public class TestClass
{
public static void main(String args[]) throws Exception
{
T t1 = new T("T1");
t1.start();
try{
t1.lock.lock();
System.out.println(t1.data);
}finally{
t1.lock.unlock();
}

}
}

Identify correct statement(s) about the above code.

Select 2 option(s)

Question: Given:

module abc.print{
requires org.pdf;
provides org.pdf.Print with com.abc.print.PrintImpl;
}

Identify correct statements about the above module.

Select 1 option(s)

Question: Given:

public static float parseFloat1(String s1){
try{
return Float.parseFloat(s1);
}catch(NumberFormatException e){
return 0.0f;
}catch(IllegalArgumentException e){
return Float.NaN;
}
}

Identify correct statements.

Select 1 option(s)

Question: Given:

enum Card
{
HEART, CLUB, SPADE, DIAMOND;
}

Which of the following code fragments will print
HEART CLUB SPADE DIAMOND
in that order?

Select 1 option(s)

Question: What will be the result of attempting to compile and run the following program?

public class TestClass{
public static void main(String args[]){
try{
RuntimeException re = null;
throw re;
}
catch(Exception e){
System.out.println(e);
}
}
}

Select 1 option(s)

Question: What will the following code print?

var ca = new char[]{'a', 'b', 'c', 'd', 'e'};
var i = 0;
for(var c : ca){
switch(c){
case 'a' -> i++;
case 'b' -> ++i;
case 'c', 'd' -> i++;
}
}
System.out.println("i = "+i);

Select 1 option(s)

Question: Given:

String qr = INSERT CODE HERE
try(PreparedStatement ps = connection.prepareStatement(qr);){

...

}

What can be inserted in the above code?

Select 1 option(s)

Question: What will the following code print when compiled and run?

class StringWrapper {
private String theVal;
public StringWrapper(String str){ this.theVal = str; }
}
public class Tester{
public static void main(String[] args) {
StringWrapper sw = new StringWrapper("How are you?");
StringBuilder sb = new StringBuilder("How are you?");
System.out.println("Hello, "+sw);
System.out.println("Hello, "+sb);
}
}

Select 1 option(s)

Question: Which of the following statements are acceptable?

Select 4 option(s)

Question: Given:

Which of the following code fragments when inserted in the above code independent of each other will cause it to print java?

Select 1 option(s)

Question: What will be a part of the output when the following code is compiled and run?

class Boo {
int boo = 10;
public Boo(int k){ System.out.println("In Boo k = "+k); boo = k;}
}

class BooBoo extends Boo {
public BooBoo(int k ){ super(k); System.out.println("In BooBoo k = "+k); }
}

class Moo extends BooBoo implements Serializable {
int moo = 10;
public Moo(){ super(5); System.out.println("In Moo"); }
}

public class TestClass {

public static void main(String[] args) throws Exception{

var moo = new Moo();
var fos = new FileOutputStream("c:\\temp\\moo1.ser");
var os = new ObjectOutputStream(fos);
os.writeObject(moo);
os.close();
var fis = new FileInputStream("c:\\temp\\moo1.ser");
var is = new ObjectInputStream(fis);
moo = (Moo) is.readObject();
is.close();
}
}

Select 3 option(s)

Question: What will the following code print when compiled and run?

List messages =
Arrays.asList(new StringBuilder(), new StringBuilder());
messages.stream().forEach(s->s.append("helloworld"));
messages.forEach(s->{
s.insert(5,",");
System.out.println(s);
});

Select 1 option(s)

Question: Consider :

class A { public void perform_work(){} }
class B extends A { public void perform_work(){} }
class C extends B { public void perform_work(){} }

How can you let perform_work() method of A to be called from an instance method in C?

Select 1 option(s)

Question: What will the following code print when compiled and run?

 
Select 1 option(s)

Question: Complete the following code:

enum Card {
CLUB, DIAMOND, HEART, SPADE
}

public class TestClass{

public static String getColor(Card c){

INSERT CODE HERE

}
public static void main(String[] args) {
System.out.println(getColor(Card.CLUB));
}
}

Select 2 option(s)

Question: What will be the output of the following program?

class TestClass{
public static void main(String[] args) throws Exception{
try{
amethod();
System.out.println("try ");
}
catch(Exception e){
System.out.print("catch ");
}
finally {
System.out.print("finally ");
}
System.out.print("out ");
}
public static void amethod(){ }
}

Select 1 option(s)

Question: What will the following code print?

DateTimeFormatter df = DateTimeFormatter.ofPattern("eeee");
LocalDate d = LocalDate.of(2000, 1, 1); //assume that it was Saturday on this date
System.out.println(df.format(d));

Select 1 option(s)

Question: What will the following code print when compiled and run?

public class Device implements AutoCloseable{
boolean open = false;
int index;
public Device(int index){
this.index = index;
open = true;
}

public void write() throws IOException{
throw new RuntimeException("Can't write!");
}

public void close(){
open = false;
System.out.println("Device closed "+index);
}

public static void main(String[] args) {
Device d1 = new Device(1);
try(d1;
Device d2 = new Device(2);
Device d3 = new Device(3)){
d2.write();
d1.close();
}catch(Exception e){
System.out.println("Got Exception "+e.getMessage());
}
}
}

Select 1 option(s)

Question: What will be the result of compiling and running the following code?

class Base{
public Object getValue(){ return new Object(); } //1
}

class Base2 extends Base{
public String getValue(){ return "hello"; } //2
}

public class TestClass{
public static void main(String[] args){
Base b = new Base2();
System.out.println(b.getValue()); //3
}
}

Select 1 option(s)

Question: Consider the following code:

public class TestOuter
{
public void myOuterMethod()
{
// 1
}
public class TestInner { }
public static void main(String[] args)
{
var to = new TestOuter();
// 2
}
}

Which of the following options correctly instantiates a TestInner object?

Select 2 option(s)

Question: Which digits and in what order will be printed when the following program is run?

public class TestClass{
public static void main(String args[]){
int k = 0;
try{
int i = 5/k;
}
catch (ArithmeticException e){
System.out.println("1");
}
catch (RuntimeException e){
System.out.println("2");
return ;
}
catch (Exception e){
System.out.println("3");
}
finally{
System.out.println("4");
}
System.out.println("5");
}
}

Select 1 option(s)

Question: Which of the following statements about deadlock is correct?

Select 1 option(s)

Question: What will the following code print when run?

class MyCallable implements Callable{
public String call() throws Exception {
Thread.sleep(50000);
return "DONE";
}
}
public class TestClass {

public static void main(String[] args) throws Exception {
var es = Executors.newSingleThreadExecutor();
var future = es.submit(new MyCallable());
System.out.println(future.get()); //1
es.shutdownNow(); //2
}
}

Select 1 option(s)

Question: Which of the following declarations is/are valid inside a static method:

1. bool b = null;

2. boolean b = 1;

3. boolean b = true|false;

4. bool b = (10<11);

5. boolean b = true||false;

6. var b = 10>11;

Select 1 option(s)

Question: Given:

public class TestClass
{
public static void main(String args[])
{
B b = new C();
A a = b;

INSERT CODE HERE

}
}
class A {
void a(){ System.out.println("a"); }
}
class B extends A {
void b(){ System.out.println("b"); }
}
class C extends B {
void c(){ System.out.println("c"); }
}

What can be inserted in the above code?

Select 2 option(s)

Question: Consider the following code:

Statement stmt = null;
try(Connection c = DriverManager.getConnection("jdbc:derby://localhost:1527/sample",
"app", "app"))
{
stmt = c.createStatement();
ResultSet rs = stmt.executeQuery("select * from STUDENT");
while(rs.next()){
System.out.println(rs.getString(1));
}

}
catch(SQLException e){
System.out.println("Exception "+e);
}

Which objects can be successfully used to query the database after the try block ends without any exception?

Select 1 option(s)

Question: What will the following class print when executed?

class Test{
static boolean a;
static boolean b;
static boolean c;
public static void main (String[] args){
boolean bool = (a = true) || (b = true) && (c = true);
System.out.print(a + ", " + b + ", " + c);
}
}

Select 1 option(s)

Question: Given:

abstract class Base{
abstract int power();
}

class A extends Base{
@Override
int power(){ return 0; }
}

class AA extends A{
@Override
int power(){ return 1; }
void mAA(){
System.out.println("mAA");
}
}

class B extends Base{
@Override
int power(){ return 1; }
}

public class TestClass
{

void processBase(Base base){
INSERT CODE HERE
}

}

What can be inserted in the above code?

Select 2 option(s)

Question: Consider the program shown in exhibit and select the right option(s).

public class TestClass
{
static StringBuffer sb1 = new StringBuffer();
static StringBuffer sb2 = new StringBuffer();
public static void main(String[] args)
{
new Thread
(
new Runnable()
{
public void run()
{
synchronized(sb1)
{
sb1.append("X");
synchronized(sb2)
{
sb2.append("Y");
}
}
System.out.println(sb1);
}
}
).start();
new Thread
(
new Runnable()
{
public void run()
{
synchronized(sb2)
{
sb2.append("Y");
synchronized(sb1)
{
sb1.append("X");
}
}
System.out.println(sb2);
}
}
).start();
}
}

Select 1 option(s)

Question: Given:

class NewException extends Exception {}

class AnotherException extends Exception {}

public class ExceptionTest{
public static void main(String[] args) {
try{
if(args.length == 0) m2(); else m3();
}

*INSERT CODE HERE*
}

public static void m2() throws NewException { throw new NewException(); }

public static void m3() throws AnotherException{ throw new AnotherException(); }

}

Which of the following options can be inserted in the above code to make it compile?

Select 3 option(s)

Question: Which of the statements regarding the following code are correct?

public class TestClass{
static int a;
int b;
public TestClass(){
int c;
c = a;
a++;
b += c;
}
public static void main(String args[]) { new TestClass(); }
}

Select 1 option(s)

Question: What will the following code print?

List ls = Arrays.asList("Tom Cruise", "Tom Hart",
"Tom Hanks", "Tom Brady");
Predicate p = str->{
System.out.println("Looking...");
return str.indexOf("Tom") > -1;
};
boolean flag = ls.stream().filter(str->str.length()>8).allMatch(p);

Select 1 option(s)