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NEW QUESTION 62
public class StringReplace { public static void main(String[] args) { String message = "Hi everyone!";
System.out.println("message = " + message.replace("e", "X")); }
}
What is the result?
- A. A compile time error is produced.
- B. A runtime error is produced.
- C. message = Hi XvXryonX!
- D. message =
- E. message = Hi Xveryone!
- F. message = Hi everyone!
Answer: C
NEW QUESTION 63
Given:
Which statement, when inserted into line 5, is valid change?
- A. asc = sc.clone ()
- B. sc = asc;
- C. asc = sc;
- D. asc = (object) sc;
Answer: B
Explanation:
Works fine.
NEW QUESTION 64
Given:
What is the result?
- A. 3 6 4 6
- B. 3 4 5 6
- C. 5 4 5 6
- D. 3 4 3 6
Answer: C
NEW QUESTION 65
Given the code fragment:
Which two modifications should you make so that the code compiles successfully?
- A. Option D
- B. Option A
- C. Option B
- D. Option C
- E. Option E
Answer: E
NEW QUESTION 66
What is the name of the Java concept that uses access modifiers to protect variables and hide them within a class?
- A. Abstraction
- B. Encapsulation
- C. Polymorphism
- D. Instantiation
- E. Inheritance
Answer: B
Explanation:
Using the private modifier is the main way that an object encapsulates itself and hide data from the outside world.
Reference: http://www.tutorialspoint.com/java/java_access_modifiers.htm
NEW QUESTION 67
Given the code fragment:
StringBuilder sb = new StringBuilder ( ) ;
Sb.append ("world");
Which code fragment prints Hello World?
- A. sb.set(0,"Hello "); System.out.println(sb);D
- B. sb.insert(0,"Hello "); System.out.println(sb);
- C. sb.add(0,"Hello "); System.out.println(sb);
- D. sb.append(0,"Hello "); System.out.println(sb);
Answer: B
Explanation:
The java.lang.StringBuilder.insert(int offset, char c) method inserts the string representation of the char argument into this sequence. The second argument is inserted into the contents of this sequence at the position indicated by offset. The length of this sequence increases by one.The offset argument must be greater than or equal to 0, and less than or equal to the length of this sequence.
Reference: Java.lang.StringBuilder.insert() Method
NEW QUESTION 68
Given the code fragment:
What is the result?
- A. Answer = 0
- B. Compilation fails only at line n1.
- C. Compilation fails only at line n2.
- D. Invalid calculation
- E. Compilation fails only at line n1andline2.
Answer: E
NEW QUESTION 69
Given:
What is the result?
- A. Option A
- B. Option D
- C. Option B
- D. Option C
Answer: B
NEW QUESTION 70
Given:
What is the output?
- A. 2015-04-27
- B. 2015-02-27
- C. Compilation fails due to error at line 6.
- D. 2015-03-27
- E. Compilation fails due to error at line 8.
Answer: D
Explanation:
To create we have used following method with LocalDate class;
public static LocalDate of(intyear, int month, int dayOfMonth)
Here we need to remember that month is not zero based so if you pass 1 for month, then
month will be January.
Then we have used period object of 1 day and add to date object which makes current date
to next day, so final output is 2015-03-27. Hence option A is correct.
https://docs.oracle.com/javase/tutorial/datetime/iso/datetime.html
NEW QUESTION 71
Given the following class:
And given the following main method, located in another class:
Which three lines, when inserted independently at line n1, cause the program to print a 0 balance?
- A. amount = 0;
- B. acct. getAmount () = 0;
- C. acct.changeAmount(-acct.getAmount());
- D. acct (0) ;
- E. this.amount = 0;
- F. acct.changeAmount(-acct.amount);
- G. acct.changeAmount(0);
- H. acct.amount = 0;
Answer: D,E,H
NEW QUESTION 72
Given the code fragment:
Which two modifications should you make so that the code compiles successfully?
- A. Option D
- B. Option C
- C. Option B
- D. Option A
- E. Option E
Answer: B,C
NEW QUESTION 73
Give:
Public Class Test {
}
Which two packages are automatically imported into the java source file by the java compiler?
- A. Java.util
- B. Java.awt
- C. Java.lang
- D. Javax.net
- E. The package with no name
- F. Java.*
Answer: C,E
Explanation:
For convenience, the Java compiler automatically imports three entire packages for each source file: (1) the package with no name, (2) the java.lang package, and (3) the current package (the package for the current file).
Note:Packages in the Java language itself begin with java. or javax.
NEW QUESTION 74
Given:
and the code fragment:
What is the result?
- A. AD
- B. BD
- C. AC
- D. BC
Answer: D
Explanation:
NEW QUESTION 75
Given the code fragment:
Which option represents the state of the num array after successful completion of the outer loop?
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: B
NEW QUESTION 76
Given the code fragment:
What is the result?
- A. Compilation fails at both line n1 and line n2.
- B. Jesse 25
Walter 52 - C. Compilation fails only at line n1.
- D. Compilation fails only at line n2.
Answer: A
NEW QUESTION 77
Given this segment of code:
Which two statements, if either were true, would make the code compile? (Choose two.)
- A. Cycle and MotorCycle both implement the Transportation interface.
- B. MotorCycle is a superclass of Cycle.
- C. MotorCycle is an interface that implements the Cycle class.
- D. Cycle and MotorCycle both extend the Transportation superclass.
- E. Cycle is an abstract superclass of MotorCycle.
- F. Cycle is an interface that is implemented by the MotorCycle class.
Answer: E,F
NEW QUESTION 78
Given the following classes:
Which two options fail to compile when placed at line n1 of the main method?
- A. director.stockOptions = 1_000;
- B. employee.budget = 200_000;
- C. manager.stockOption = 500;
- D. manager.budget = 1_000_000;
- E. director.salary = 80_000;
- F. employee.salary = 50_000;
Answer: B,C
NEW QUESTION 79
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 80
The protected modifier on a Field declaration within a public class means that the field ______________.
- A. Can be read but not written from outside the class
- B. Cannot be modified
- C. Can be read and written from this class and its subclasses defined in any package
- D. Can be read and written from this class and its subclasses only within the same package
Answer: C
NEW QUESTION 81
Which two are benefits of polymorphism? (Choose two.)
- A. More flexible and reusable code
- B. Faster code at runtime
- C. More efficient code at runtime
- D. Code that is protected from extension by other classes
- E. More dynamic code at runtime
Answer: A,C
Explanation:
Explanation/Reference:
Reference: https://www.cs.princeton.edu/courses/archive/fall98/cs441/mainus/node5.html
NEW QUESTION 82
Given:
What is the result?
- A. Area is 6.0
- B. Area is 3.0
- C. Compilation fails at line n1
- D. Compilation fails at line n2.
Answer: A
NEW QUESTION 83
Given:
What is the result?
- A. false, true
- B. false, false
- C. true, false
- D. true, true
Answer: A
NEW QUESTION 84
Given the code fragment:
What is the result?
- A. true false
- B. true true
- C. false true
- D. false false
Answer: D
NEW QUESTION 85
Consider following method
Which statement is true?
- A. This method can return anything.
- B. This method can be used only in an interface or an abstract class.
- C. This method is invalid.
- D. This method can be used only in an interface.
- E. None of above.
Answer: D
Explanation:
Given method is declared as default method so we can use it only inside an interface.
Hence option B is correct and option D is incorrect.
Option A is incorrect as it is valid method. Option C is incorrect as return type is void, which
means we can't return anything.
NEW QUESTION 86
Which three statements are true about exception handling? (Choose three.)
- A. All subclasses of the Exception class except the RuntimeException class are checked exceptions.
- B. Only unchecked exceptions can be rethrown.
- C. All subclasses of the RuntimeException class must be caught or declared to be thrown.
- D. All subclasses of the Error class are checked exceptions and are recoverable.
- E. All subclasses of the RuntimeException class are recoverable.
- F. The parameter in a catch block is of Throwable type.
Answer: A,D,F
NEW QUESTION 87
......
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