Java SE 8 Programmer (1Z0-808) Exam Dumps 2022

Java SE 8 Programmer (1Z0-808) Exam Dumps 2022

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Below are the free 10 sample questions.

Question 1:

Which of the following will compile successfully and produce output A when inserted independently at line 5?(Choose 3 options)

class Skillcertlab{

public static void main(String [] args) {

int x = -10;

int y = 10;

//insert here

System.out.print(""A"");

}

}

A. if(y++>10 | x%(-3)==1)

B. if(y>=10 & x%(-3)==-1)

C. if(y>10 | x%(3)==-1)

D. if(++y>10 & x%(-3)==1)

E. if( ++y>10 | x%(-3)==1)

F. if(y++>=10 ^ x%(-3)==-1)

Answer: B, C, E

Explanation:

x %(-3) will produce -1 because x is marked as minus (-).Post increment will do anything in the executing moment so y++ will be still same(y=10). But pre-increment makes it 11 before check it with value 10.

Reference: http://docs.oracle.com/javase/tutorial/java/nutsandbolts/operators.html

The correct answers are: if(y>=10 & x%(-3)==-1), if(y>10 | x%(3)==-1), if( ++y>10 | x%(-3)==1)

Question 2:

What will be the output of this program code?

public class Program {

public static void main(String args [ ]) {

Character ch = new Character(""a"");

System.out.print(Character.isLetterOrDigit(ch));

}

}

A. true

B. false

C. An Exception is thrown.

D. Compilation fails due to error at line 3.

E. Compilation fails due to error at line 4.

Answer: D

Explanation:

Wrapper class Character has one constructor which takes char the parameter. So at line 3, trying to create a Character object by passing string causes a compile time error. So, option D is correct.

REFERENCE : https://docs.oracle.com/javase/tutorial/java/data/characters.html

The correct answer is: Compilation fails due to error at line 3.

Question 3:

What will be the output of this program?

import java.time.LocalDate;

import java.time.temporal.ChronoField;

public class Skillcertlab{

public static void main(String[] args) {

LocalDate ld = LocalDate.of(2015, 12, 12);

ld = ld.with(ChronoField.DAY_OF_YEAR,30);

System.out.println(ld);

}

}

A. 2015-12-12

B. 2015-01-30

C. 2015-12-30

D. An Exception will be thrown.

E. Compilation fails.

Answer: B

Explanation:

With the method of the LocalDate class returns a copy of this date with the specified field set to a new value.

public LocalDate with(TemporalField field, long newValue)

So, here this will change the day to 30th day of the year so the month will also be changed since the 1/30 is the 30th day of the year result will be 2015-01-30; hence option B is correct.

Reference:

https://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html

The correct answer is: 2015-01-30

Question 4:

What will be the output of this program?

public class Skillcert{

public static void main(String args[]){

Integer i = 10;

Double d = 10.0;

int ii = 10;

double dd = 10.0;

System.out.print(i.equals(d) + "" "");

System.out.print(ii == dd);

}

}

A. true true

B. true false

C. false false

D. false true

E. Compilation fails

Answer: D

Explanation:

While using equals method of wrappers, it checks the wrapper type and the wrapper primitive value. Hence, line 8 will result in false since i and d are not the same types. Comparison of primitives using ‘==’ will check the actual value of the variable refer not the type. Hence, at line 9, true will be printed. Hence, option D is correct.

Reference:

http://docs.oracle.com/javase/tutorial/java/IandI/objectclass.html

The correct answer is: false true

Question 5:

Which of the following is the correct method signature of overloaded version of this method?

public void method() { / *codes */}

A. public int method()

B. private void method()

C. private int method(String s)

D. public String method()

E. None of the above

Answer: C

Explanation:

While overloading the method, argument list should be changed. So, option C is correct since it changes the argument list. It is legal to change the return type when we overload methods.

Reference : http://docs.oracle.com/javase/tutorial/java/javaOO/returnvalue.html

The correct answer is: private int method(String s)

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Question 6:

What will be the output of this program?

class Skillcert {

public static void main(String args[]) {

Double d = 10;

int i = 10;

Integer wi = 10;

System.out.print((wi == i) + "" "");

System.out.print(d == i);

}

}

A. true false

B. false false

C. true true

D. Compilation fails due to an error at line 3

E. Compilation fails due to an error at line 7

Answer: D

Explanation:

While assigning literals to wrapper we need to assign wrapper or primitive in wrapper type since assignment can’t unwrap and then wide the literal. So, here at line 3, we have tried to assign an integer primitive literal to the Double wrapper which results in a compile time error. So, option D is correct.

REFERENCE :

https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html

The correct answer is: Compilation fails due to an error at line 3

Question 7:

What will be the output of this program?

class Skillcert {

public static void main(String args[]){

int x = 1;

int y = new Skillcert().change(x);

System.out.print(x+y);

}

int change(int x) {

x = 2;

return x;

}

}

A. 2

B. 3

C. 4

D. Compilation fails

E. An exception is thrown at runtime

Answer: B

Explanation:

When you are passing a primitive variable, you are passing a copy of the bits representing the variable. Here we have passed the variable x to change method which will pass the bit patter of 1, not the reference, so the value of x in the main method will remain unchanged. So, the output will be 3, hence option B is correct. Reference:

http://docs.oracle.com/javase/tutorial/java/javaOO/arguments.html

The correct answer is: 3

Question 8:

What will be the output of this program?

public class Skillcertlab{

public static void main(String args[]){

args = {""1"",""2"",""3""};

for(String s : args){

if(s.equals(""1"")) continue;

System.out.print(s);

}

}

}

A. 123

B. 1

C. 23

D. An Exception is thrown.

E. Compilation fails.

Answer: E

Explanation:

When we use array constants, they can be used only in initializes. Simply, you can’t declare an array in one statement and then assign array values with array constants (i.e. {1,2,3}) in another statement. So, code fails to compile due to line 3. Hence, option E is correct.

Reference: http://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html The correct answer is: Compilation fails.

Question 9:

Which of the following is valid array declaration?

A. String strs[][] = new String[][1];

B. String strs[][] = new String[3][];

C. String strs[2][] = new String[][];

D. String strs[][] = new String[3];

E. String strs[][] = new String[][];

Answer: B

Explanation:

When we create multi-dimensional arrays, we need to give first dimension size. So, when you create a two-dimensional array, we must give the number of rows when we initialize it. So, here options A and E are incorrect. Option B is correct since it creates a two-dimensional array without passing the size for columns which is legal, then we can define a different number of columns for each row. Reference : http://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

The correct answer is: String strs[][] = new String[3][];

Question 10:

Java source code will be compiled in to _ _ _ _ _ _ _ _ file.

A. java

B. class

C. exe

D. byte

E. None of the above

Answer: B

Explanation:

When we compile the java source we get the bytecode. Java bytecode is the instruction set of the Java virtual machine. Each bytecode is composed by one, or in some cases two, bytes that represent the instruction (opcode), along with zero or more bytes for passing parameters. So, option B is correct.

REFERENCE : https://docs.oracle.com/javase/tutorial/getStarted/application/index.html

The correct answer is: class

• For a full set of 750+ questions. Go to

• https://skillcertpro.com/product/java-se-8-programmer-i-1z0-808-exam-questions/

• SkillCertPro offers detailed explanations to each question which helps to understand the concepts better.

• It is recommended to score above 85% in SkillCertPro exams before attempting a real exam.

• SkillCertPro updates exam questions every 2 weeks.

• You will get life time access and life time free updates

• SkillCertPro assures 100% pass guarantee in first attempt.