Free 1Z0-808 Exam Dumps Preview

Question 1

Single choice

Given:

What is the result?

1. A

   11, 21, 31, 11, 21, 31

2. B

   11, 21, 31, 12, 22, 32

3. C

   12, 22, 32, 12, 22, 32

4. D

   10, 20, 30, 10, 20, 30

Reveal answer details Close answer details

Correct answerD

Question 2

Single choice

Given:

And given the code fragment:

What is the result?

1. A

   Compilation fails at line n2.

2. B

   Compilation fails at line n1.

3. C

   20:20

4. D

   10:20

Reveal answer details Close answer details

Correct answerC

Question 3

Single choice

Which of the following can fill in the blank in this code to make it compile?

1. A

   abstract

2. B

   final

3. C

   private

4. D

   default

5. E

   int

Reveal answer details Close answer details

Correct answerC

Explanation

From Java SE 8, we can use static and/or default methods in interfaces, but they should be non abstract methods. SO in this case using default in blank is completely legal. Hence option C is correct.
Option A is incorrect as given method is not abstract, so can't use abstract there. Options B and E are incorrect as we can't have non abstract method interface if they are not default or static.
httpsy/docs.oracle.com/javase/tutorial/iava/landl/defaultmethods.html

Question 4

Single choice

Given the code fragment:

What is the result if the integer aVar is 9?

1. A

   10 Hello world!

2. B

   10 Hello universe!

3. C

   9 Hello world!

4. D

   Compilation fails.

Reveal answer details Close answer details

Correct answerB

Question 5

Single choice

Given:

What is the result?

1. A

   Null

2. B

   Compilation fails

3. C

   An exception is thrown at runtime

4. D

   0

Reveal answer details Close answer details

Correct answerC

Question 6

Single choice

Given:
public class TestLoop {

public static void main(String[] args) {

int array[] = {0, 1, 2, 3, 4};

int key = 3;

for (int pos = 0; pos < array.length; ++pos) {

if (array[pos] == key) {

break;

}

}

System.out.print("Found " + key + "at " + pos);

}

}

What is the result?

1. A

   Found 3 at 2

2. B

   Found 3 at 3

3. C

   Compilation fails

4. D

   An exception is thrown at runtime

Reveal answer details Close answer details

Correct answerC

Explanation

Explanation: The following line does not compile:
System.out.print("Found " + key + "at " + pos);

The variable pos is undefined at this line, as its scope is only valid in the for loop. Any variables created inside of a loop are LOCAL TO THE LOOP.

Question 7

Single choice

Given:

What is the result?

1. A

   hEllOjAvA!

2. B

   Hello java!

3. C

   Out of limits
   hEllOjAvA!

4. D

   Out of limits

Reveal answer details Close answer details

Correct answerC

Question 8

Single choice

Given:

What is the result?

1. A

   null
   Richard
   Donald

2. B

   Richard
   Donald

3. C

   Compilation fails.

4. D

   An ArrayIndexOutOfBoundsException is thrown at runtime.

5. E

   A NullPointerException is thrown at runtime.

Reveal answer details Close answer details

Correct answerE

Question 9

Single choice

Given the code fragment:

class Student {

int rollnumber;

String name;

List cources = new ArrayList();

// insert code here

public String toString() {

return rollnumber + " : " + name + " : " + cources;

}

}

And,

public class Test {

public static void main(String[] args) {

List cs = newArrayList();

cs.add("Java");

cs.add("C");

Student s = new Student(123,"Fred", cs);

System.out.println(s);
}

}

Which code fragment, when inserted at line // insert code here, enables class Test to print 123 : Fred :
[Java, C]?

1. A

   private Student(int i, String name, List cs) {
   /* initialization code goes here */
   }

2. B

   public void Student(int i, String name, List cs) { /* initialization code goes here */
   }

3. C

   Student(int i, String name, List cs) {
   /* initialization code goes here */
   }

4. D

   Student(int i, String name, ArrayList cs) {
   /* initialization code goes here */
   }

Reveal answer details Close answer details

Correct answerC

Explanation

Incorrect:
Not A: Student has private access line: Student s = new Student(123,"Fred", cs); Not D: Cannot be applied to given types. Line: Student s = new Student(123,"Fred", cs);

Question 10

Single choice

Given the code fragment:

What is the result?

1. A

   2 4

2. B

   0 2 4 6

3. C

   0 2 4

4. D

   Compilation fails

Reveal answer details Close answer details

Correct answerC

Question 11

Single choice

Given:

What is result?

1. A

   Successful

2. B

   Unsuccessful

3. C

   Compilation fails

4. D

   An exception is thrown at runtime

Reveal answer details Close answer details

Correct answerC

Question 12

Single choice

Given:

What is the result?

1. A

   Hello Log 2:2

2. B

   Welcome Log 1:2

3. C

   Welcome Log 2:1

4. D

   Hello Log 1:2

Reveal answer details Close answer details

Correct answerC

Question 13

Multiple choice

Which three statements are true about the structure of a Java class? (Choose three.)

1. A

   A class cannot have the same name as its field.

2. B

   A public class must have a main method.

3. C

   A class can have final static methods.

4. D

   A class can have overloaded private constructors.

5. E

   Fields need to be initialized before use.

6. F

   Methods and fields are optional components of a class.

Reveal answer details Close answer details

Correct answersC, D, F

Question 14

Single choice

Given:

And given the code fragment:

What is the result?

1. A

   Compilation fails at line n2.

2. B

   Read Book

3. C

   Read E-Book

4. D

   Compilation fails at line n1.

5. E

   Compilation fails at line n3.

Reveal answer details Close answer details

Correct answerE

Question 15

Single choice

Given the code fragment:

Which code fragment at line 10 prints Welcome 100?

1. A

   Option A

2. B

   Option B

3. C

   Option C

4. D

   Option D

Reveal answer details Close answer details

Correct answerB

Explanation

Question 16

Single choice

Given:

Which inserted at line 11, will provide the following output?

[21, 15, 11]

1. A

   list.removelf(e > e%2 != 0);

2. B

   list.removelf(e -> e%2 != 0);

3. C

   Ust.removelf(e -> e%2 = 0);

4. D

   list.remove(e -> e%2 = 0);

5. E

   None of the above.

Reveal answer details Close answer details

Correct answerC

Explanation

In output we can see that only odd numbers present, so we need to remove only even numbers to get expected output. From Java SE 8, there is new method call removelf which takes predicate object and remove elements which satisfies predicate condition. Predicate has functional method call take object and check if the given condition met or not, if met it returns true, otherwise false. Option C we have passed correct lambda expression to check whether the number is odd or even that matches to the functional method of predicate interface.
Option A is incorrect as it is invalid lambda expression.
Option B is incorrect as it removes all odd numbers.
Option D is incorrect as there is no remove method that takes predicate as argument.
https://docs.oracle.eom/javase/8/docs/api/java/util/ArrayList.html

Question 17

Single choice

Given:

public class Test {

public static void main(String[] args) {

try {

String[] arr =new String[4];

arr[1] = "Unix";

arr[2] = "Linux";

arr[3] = "Solarios";

for (String var : arr) {

System.out.print(var + " ");

}

}
catch(Exception e) {

System.out.print (e.getClass());

}

}

}

What is the result?

1. A

   Unix Linux Solaris

2. B

   Null Unix Linux Solaris

3. C

   Class java.lang.Exception

4. D

   Class java.lang.NullPointerException

Reveal answer details Close answer details

Correct answerB

Explanation

Explanation: null Unix Linux Solarios

The first element, arr[0], has not been defined.

Question 18

Single choice

Given the following code:

What is the output?

1. A

   4
   4

2. B

   3
   5
   

3. C
   4

   7
4. D
   5

   4
5. E

   4
   5

6. F

   4
   21

Reveal answer details Close answer details

Correct answerE

Question 19

Multiple choice

Given:

Which two code fragments can be inserted at line n1?

1. A

   String str = "Java";

2. B

   for(int iVal = 0; iVal <=5; iVal++){}

3. C

   Test() {}

4. D

   package p1;

5. E

   import java.io.*;

Reveal answer details Close answer details

Correct answersA, C

Question 20

Single choice

Given:

What is the result?

1. A

   true true

2. B

   true false

3. C

   false true

4. D

   false false

5. E

   Compilation fails

Reveal answer details Close answer details

Correct answerB

Question 21

Multiple choice

Given the following segment of code:

Which two statements, if either were true, would make the code compile? (Choose two.)

1. A

   MotorCycle is an interface that implements the Cycle class.

2. B

   Cycle is an interface that is implemented by the MotorCycle class.

3. C

   Cycle is an abstract superclass of MotorCycle.

4. D

   Cycle and MotorCycle both extend the Transportation superclass.

5. E

   Cycle and MotorCycle both implement the Transportation interface.

6. F

   MotorCycle is a superclass of Cycle.

Reveal answer details Close answer details

Correct answersB, C

Question 22

Single choice

Given:

class Sports {

int num_players;

String name, ground_condition;

Sports(int np, String sname, String sground){

num_players = np;

name = sname;

ground_condition = sground;

}

}

class Cricket extends Sports {

int num_umpires;

int num_substitutes;

Which code fragment can be inserted at line //insert code here to enable the code to compile?

1. A

   Cricket() {
   super(11, "Cricket", "Condidtion OK");
   num_umpires =3;
   num_substitutes=2;
   }

2. B

   Cricket() {
   super.ground_condition = "Condition OK";
   super.name="Cricket";
   super.num_players = 11;
   num_umpires =3;
   num_substitutes=2;
   }

3. C

   Cricket() {
   this(3,2);
   super(11, "Cricket", "Condidtion OK");
   }
   Cricket(int nu, ns) {
   this.num_umpires =nu;
   this.num_substitutes=ns;
   }

4. D

   Cricket() {
   this.num_umpires =3;
   this.num_substitutes=2;
   super(11, "Cricket", "Condidtion OK");
   }

Reveal answer details Close answer details

Correct answerA

Explanation

Incorrect:
not C, not D: call to super must be the first statement in constructor.

Question 23

Single choice

Given the code fragment:

What is the result?

1. A

   An exception is thrown at runtime.

2. B

   -1

3. C

   5

4. D

   0

Reveal answer details Close answer details

Correct answerC

Question 24

Single choice

Given the code fragment:

What is the result?

1. A

   Compilation fails.

2. B

   Hi removed

3. C

   An UnsupportedOperationException is thrown at runtime.

4. D

   The program compiles, but it prints nothing.

Reveal answer details Close answer details

Correct answerA

Question 25

Single choice

Given:

What is the output?

1. A

   1Z0

2. B

   1Z0-808

3. C

   An exception will be thrown.

4. D

   Compilation fails due to error at line 3.

5. E

   Compilation tails due to error at line 4.

Reveal answer details Close answer details

Correct answerE

Explanation

Option E is the correct answer.
Code fails to compile because there is no method called concert in StringBuilder class. The concert method is in String class. Hence option E is correct Here we should have used append method of StringBuilder class, in that case
option B would be correct.
https://docs.oracle.com/javase/tutorial/java/data/buffers.html

Question 26

Single choice

Given the content of three files:

Which statement is true?

Which statement is true?

1. A

   Only the A.Java file compiles successfully.

2. B

   Only the B.java file compiles successfully.

3. C

   Only the C.java file compiles successfully.

4. D

   The A.Java and B.java files compile successfully.

5. E

   The B.java and C.java files compile successfully.

6. F

   The A.Java and C.java files compile successfully.

Reveal answer details Close answer details

Correct answerA

Explanation

Explanation: In class B.Java doStuff() has access modifier with variable name which is not allowed. C.Java class name is different than file name. Only private classes can have different names than file names

Question 27

Single choice

Which of the following will print current time?

1. A

   System.out.print(new LocalTime()-now0);

2. B

   System.out.print(new LocalTime());

3. C

   System.ouLprint(LocalTime.now());

4. D

   System.ouLprint(LocalTime.today());

5. E

   None of the above.

Reveal answer details Close answer details

Correct answerC

Explanation

The LocalTime is an interface, so we can't use new keyword with them. So options A and C are incorrect.
To get current time we can call now method on LocalTime interface. So option C is correct.
Option D is incorrect as there is no method called today as in LocalTime interface
https://docs.oracle.com/javase/tutorial/datetime/iso/datetime.html

Question 28

Multiple choice

Which two statements correctly describe checked exception?

1. A

   These are exceptional conditions that a well-written application should anticipate and recover from.

2. B

   These are exceptional conditions that are external to the application, and that the application usually cannot anticipate or recover from.

3. C

   These are exceptional conditions that are internal to the application, and that the application usually cannot anticipate or recover from.

4. D

   Every class that is a subclass of RuntimeException and Error is categorized as checked exception.

5. E

   Every class that is a subclass of Exception, excluding RuntimeException and its subclasses, is categorized as checked exception.

Reveal answer details Close answer details

Correct answersB, D

Explanation

Explanation: Checked exceptions:
* (B) represent invalid conditions in areas outside the immediate control of the program (invalid user input, database problems, network outages, absent files)
* are subclasses of Exception
It's somewhat confusing, but note as well that RuntimeException (unchecked) is itself a subclass of Exception (checked).

* a method is obliged to establish a policy for all checked exceptions thrown by its implementation (either pass the checked exception further up the stack, or handle it somehow)

References:
Checked versus unchecked exceptions

Question 29

Multiple choice

Given the code fragment:

And given the requirements:
1. Process all the elements of the array in the reverse order of entry.
2. Process all the elements of the array in the order of entry.
3. Process alternating elements of the array in the order of entry.

Which two statements are true? (Choose two.)

1. A

   Requirements 1, 2, and 3 can be implemented by using the enhanced for loop.

2. B

   Requirements 1, 2, and 3 can be implemented by using the standard for loop.

3. C

   Requirements 2 and 3 CANNOT be implemented by using the standard for loop.

4. D

   Requirement 2 can be implemented by using the enhanced for loop.

5. E

   Requirement 3 CANNOT be implemented by using either the enhanced for loop or the standard for loop.

Reveal answer details Close answer details

Correct answersB, D

Question 30

Multiple choice

Which three statements are true about exception handling? (Choose three.)

1. A

   Only unchecked exceptions can be rethrown.

2. B

   All subclasses of the RuntimeException class are recoverable.

3. C

   The parameter in a catch block is of Throwable type.

4. D

   All subclasses of the RuntimeException class must be caught or declared to be thrown.

5. E

   All subclasses of the Exception class except the RuntimeException class are checked exceptions.

6. F

   All subclasses of the Error class are checked exceptions and are recoverable.

Reveal answer details Close answer details

Correct answersC, E, F

Question 31

Single choice

Consider

Integer number = Integer.valueOff 808.1");

Which is true about the above statement?

1. A

   The value of the variable number will be 808.1

2. B

   The value of the variable number will be 808

3. C

   The value of the variable number will be 0.

4. D

   A NumberFormatException will be throw.

5. E

   It will not compile.

Reveal answer details Close answer details

Correct answerD

Explanation

The Integer class value of 0 returns an Integer from given string. But we need to pass string which has correct format for integer otherwise it will throw a NumberFormatException. In this case we have passed string which is not an integer value (since what we passed is fractional number), so option D is correct.

Question 32

Single choice

Given the code fragment:

What is the result?

1. A

   3

2. B

   4

3. C

   -1

4. D

   Compilation fails.

Reveal answer details Close answer details

Correct answerC

Question 33

Single choice

Given:

What is the result?

1. A

   Compilation fails.

2. B

   false true

3. C

   true false

4. D

   true true

5. E

   false false

Reveal answer details Close answer details

Correct answerB

Question 34

Single choice

Given the code fragments:

And,

Which statement is true?

1. A

   After line 11, three objects are eligible for garbage collection.

2. B

   After line 11, two objects are eligible for garbage collection.

3. C

   After line 11, one object is eligible for garbage collection.

4. D

   After line 11, none of the objects are eligible for garbage collection.

Reveal answer details Close answer details

Correct answerC

Question 35

Single choice

Given:

public class Painting {

private String type;

public String getType() {

return type;

}

public void setType(String type) {

this.type = type;

}

public static void main(String[] args) {

Painting obj1 = new Painting();

Painting obj2 = new Painting();

obj1.setType(null);

obj2.setType("Fresco");

System.out.print(obj1.getType() + " : " + obj2.getType());

}

}

What is the result?

1. A

   : Fresco

2. B

   null : Fresco

3. C

   Fresco : Fresco

4. D

   A NullPointerException is thrown at runtime

Reveal answer details Close answer details

Correct answerB

Question 36

Single choice

Given:

Which code fragment, when inserted at line 9, enables the code to print true?

1. A

   String str2 = str1;

2. B

   String str2 = new string (str1);

3. C

   String str2 = sb1.toString();

4. D

   String str2 = "Duke";

Reveal answer details Close answer details

Correct answerA

Question 37

Single choice

Given the code fragment:

List colors = new ArrayList();

colors.add("green");

colors.add("red");

colors.add("blue");

colors.add("yellow");

colors.remove(2);

colors.add(3,"cyan");

System.out.print(colors);

What is the result?

1. A

   [green, red, yellow, cyan]

2. B

   [green, blue, yellow, cyan]

3. C

   [green, red, cyan, yellow]

4. D

   Am IndexOutOfBoundsException is thrown at runtime

Reveal answer details Close answer details

Correct answerB

Question 38

Single choice

Given the code fragment:

Which modification enables the code fragment to print TrueDone?

1. A

   Replace line 5 With String result = "true";
   Replace line 7 with case "true":

2. B

   Replace line 5 with boolean opt = l;
   Replace line 7 with case 1=

3. C

   At line 9, remove the break statement.

4. D

   Remove the default section.

Reveal answer details Close answer details

Correct answerA

Question 39

Single choice

Given:

What is the result?

1. A

   400 200

2. B

   200 200

3. C

   400 400

4. D

   Compilation fails.

Reveal answer details Close answer details

Correct answerA

Question 40

Single choice

Given:

Which code fragment should you use at line n1 to instantiate the dvd object successfully?

1. A

   Option A

2. B

   Option B

3. C

   Option C

4. D

   Option D

Reveal answer details Close answer details

Correct answerC

Question 41

Single choice

Given:

1. A

   ns = 50 S = 125
   ns = 125 S = 125
   ns = 100 S = 125

2. B

   ns = 50 S = 125
   ns = 125 S = 125
   ns = 0 S = 125

3. C

   ns = 50 S = 50
   ns = 125 S = 125
   ns = 100 S = 100

4. D

   ns = 50 S = 50
   ns = 125 S = 125
   ns = 0 S = 125

Reveal answer details Close answer details

Correct answerB

Question 42

Multiple choice

Given:

Which two code fragments are valid?

1. A

   Option A

2. B

   Option B

3. C

   Option C

4. D

   Option D

5. E

   Option E

Reveal answer details Close answer details

Correct answersB, C

Explanation

Explanation: When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class (C). However, if it does not, then the subclass must also be declared abstract (B). Note: An abstract class is a class that is declared abstract--it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.

Question 43

Single choice

Given the code fragment:

What is the result?

1. A

   Result A 01
   Result B 3

2. B

   Result A 1
   Result B 12

3. C

   Result A 1
   Result B 3

4. D

   Result A 01
   Result B 12

Reveal answer details Close answer details

Correct answerD

Question 44

Single choice

Given the code fragment:

Which two code fragments inserted at line 10 print ****?

1. A

   Option A

2. B

   Option B

3. C

   Option C

4. D

   Option D

5. E

   Option E

Reveal answer details Close answer details

Correct answerE

Explanation

Question 45

Single choice

Given the code fragments:

What is the result?

1. A

   Compilation fails only at line n2.

2. B

   RTool::export
   Tool::export

3. C

   Tool::export
   Tool:export

4. D

   Compilation fails only at line n1.

5. E

   Compilation fails at both line n1 and line n2.

Reveal answer details Close answer details

Correct answerE

Question 46

Single choice

Given:

What is the result?

1. A

   A B C D

2. B

   A C D

3. C

   A C D D

4. D

   A B C C

5. E

   A B D C

Reveal answer details Close answer details

Correct answerC

Question 47

Single choice

Given the code fragment:

What is the result?

1. A

   Answer = 0

2. B

   Invalid calculation

3. C

   Compilation fails only at line n1.

4. D

   Compilation fails only at line n2.

5. E

   Compilation fails only at line n1 and line2.

Reveal answer details Close answer details

Correct answerE

Question 48

Single choice

Given the classes:

* AssertionError

* ArithmeticException
* ArrayIndexOutofBoundsException

* FileNotFoundException

* IllegalArgumentException

* IOError

* IOException

* NumberFormatException

* SQLException

Which option lists only those classes that belong to the unchecked exception category?

1. A

   AssertionError, ArrayIndexOutOfBoundsException, ArithmeticException

2. B

   AssertionError, IOError, IOException

3. C

   ArithmeticException, FileNotFoundException, NumberFormatException

4. D

   FileNotFoundException, IOException, SQLException

5. E

   ArrayIndexOutOfBoundException, IllegalArgumentException, FileNotFoundException

Reveal answer details Close answer details

Correct answerA

Explanation

Explanation: Not B: IOError and IOException are both checked errors. Not C, not D, not E:
FileNotFoundException is a checked error.
Note:
Checked exceptions:
* represent invalid conditions in areas outside the immediate control of the program (invalid user input, database problems, network outages, absent files)
* are subclasses of Exception
* a method is obliged to establish a policy for all checked exceptions thrown by its implementation (either pass the checked exception further up the stack, or handle it somehow)

Note:
Unchecked exceptions:
* represent defects in the program (bugs) - often invalid arguments passed to a non-private method. To quote from The Java Programming Language, by Gosling, Arnold, and Holmes: "Unchecked runtime exceptions represent conditions that, generally speaking, reflect errors in your program's logic and cannot be reasonably recovered from at run time."
* are subclasses of RuntimeException, and are usually implemented using IllegalArgumentException,
NullPointerException, or IllegalStateException
* method is not obliged to establish a policy for the unchecked exceptions thrown by its implementation (and they almost always do not do so)

Question 49

Single choice

Given:

What is the result?

1. A

   The program prints nothing

2. B

   d

3. C

   A StringIndexOutOfBoundsException is thrown at runtime.

4. D

   AnArrayIndexOutOfBoundsException is thrown at runtime.

5. E

   A NullPointerException is thrown at runtime.

Reveal answer details Close answer details

Correct answerC

Question 50

Single choice

Given:

What is the result?

1. A

   box

2. B

   nbo

3. C

   bo

4. D

   nb

5. E

   An exception is thrown at runtime

Reveal answer details Close answer details

Correct answerE

Question 51

Single choice

Given:

public class Test {

static boolean bVar;

public static void main(String[] args) {

boolean bVar1 = true;

int count =8;

do {

System.out.println("Hello Java! " +count);

if (count >= 7) {

bVar1 = false;
}

}
while (bVar != bVar1 && count > 4);

count -= 2;

}

}

What is the result?

1. A

   Hello Java! 8
   Hello Java! 6
   Hello Java! 4

2. B

   Hello Java! 8
   Hello Java! 6

3. C

   Hello Java! 8

4. D

   Compilation fails

Reveal answer details Close answer details

Correct answerC

Explanation

Explanation: Hello Java! 8

Question 52

Single choice

Given the code fragment
int var1 = -5;

int var2 = var1--;

int var3 = 0;

if (var2 < 0) {

var3 = var2++;

} else {

var3 = --var2;

}

System.out.println(var3);

What is the result?

1. A

   ?6

2. B

   ?4

3. C

   ?5

4. D

   5

5. E

   4

6. F

   Compilation fails

Reveal answer details Close answer details

Correct answerC

Question 53

Single choice

Given the fragment:

String[][] arra = new String[3][];

arra[0] = new String[]{"rose", "lily"};

arra[1] = new String[]{"apple", "berry","cherry","grapes"};

arra[0] = new String[]{"beans", "carrot","potato"};

// insert code fragment here

Which code fragment when inserted at line '// insert code fragment here', enables the code to successfully change arra elements to uppercase?

1. A

   String[][] arra = new String[3][];
   arra[0] = new String[]{"rose", "lily"};
   arra[1] = new String[]{"apple", "berry","cherry","grapes"}; arra[0] = new String[]{"beans",
   "carrot","potato"};
   for (int i = 0; i < arra.length; i++) {
   for (int j=0; j < arra[i].length; j++) {
   arra[i][j] = arra[i][j].toUpperCase();
   }
   }

2. B

   for (int i = 0; i < 3; i++) {
   for (int j=0; j < 4; j++) {
   arra[i][j] = arra[i][j].toUpperCase();
   }
   }

3. C

   for (String a[]:arra[][]) {
   for (String x:a[]) {

4. D

   toUpperCase();
   }
   }

5. E

   for (int i:arra.length) {
   for (String x:arra) {
   arra[i].toUpperCase();
   }
   }

Reveal answer details Close answer details

Correct answerC

Explanation

Incorrect:
not A: arra.length is 3, but the subarrays have 2, 3 and 4 elements. Index will be out of bound. not B: The subarrys are of different lengths. Index will be out of bound.
not D: Compile error.

Question 54

Single choice

Given the code fragment:

String[] cartoons = {"tom","jerry","micky","tom"};

int counter =0;

if ("tom".equals(cartoons[0])) {

counter++;

} else if ("tom".equals(cartoons[1])) {
counter++;

} else if ("tom".equals(cartoons[2])) {

counter++;

} else if ("tom".equals(cartoons[3])) {

counter++;

}

System.out.print(counter);

What is the result?

1. A

   1

2. B

   2

3. C

   4

4. D

   0

Reveal answer details Close answer details

Correct answerA

Explanation

Explanation: Counter++ will be executed only once because of the else if constructs.

Question 55

Single choice

Which usage represents a valid way of compiling java source file with the name "Main"?

1. A

   javac Main.java

2. B

   java Main.class

3. C

   java Main.java

4. D

   javac Main

5. E

   java Main

Reveal answer details Close answer details

Correct answerA

Explanation

Explanation: The compiler is invoked by the javac command. When compiling a Java class, you must include the file name, which houses the main classes including the Java extension. So to run Main.java file we have to use command in option A. TO execute Java program we can use Java command but can't use it for compiling.
https://docs.oracle.com/javase/tutorial/getStarted/application/index.html

Question 56

Single choice

Given:

Which statement is true?

1. A

   Both p and s are accessible by obj.

2. B

   Only s is accessible by obj.

3. C

   Both r and s are accessible by obj.

4. D

   p, r, and s are accessible by obj.

Reveal answer details Close answer details

Correct answerB

Question 57

Multiple choice

Given the code fragment:

Which two modifications should you make so that the code compiles successfully?

1. A

   Option A

2. B

   Option B

3. C

   Option C

4. D

   Option D

5. E

   Option E

Reveal answer details Close answer details

Correct answersA, C

Explanation

Add throws clause in both printFileContent and main.

Question 58

Single choice

Given the code fragment:

What is the result?

1. A

   1 2 3 0 0
   1 2 3 0 0

2. B

   An Exception is thrown at run time.

3. C

   1 2 3 0 0
   1 2 3

4. D

   1 2 3
   1 2 3

Reveal answer details Close answer details

Correct answerD

Explanation

Explanation: