1Z0-811 Online Practice Questions and Answers

Which statement is true about primitive variables?

A. They can be compared with the == operator.

B. They can be compared with the equals method only.

C. They cannot be compared.

D. They can be compared with the compareTo method only.

Given the code fragment:

Which two code fragments are valid at line 2?

A. for (int count = 0; count < 5; count++) {

System.out.print(count);

}

B. package p1;

C. import java.util.*; public void display() { List nums = new ArrayList<> (); }

D. { private int num; }

E. private String name = "John"; public void display() { System.out.print(name); }

Given the code fragment:

Which code fragment, when inserted at line n1, enables the code to print Java Programming:1?

A. System.out.println(name + ":" + count);

B. System.out.println(c.name + ":" + count);

C. System.out.println(c.name + ":" + Course.count);

D. System.out.println(Course.name + ":" + c.count);

Given:

What is the result?

A. [null:-]

B. [ : ]

C. [null:null]

D. [:null]

Given the code fragment:

What is the result?

A. 3

B. A compilation error occurs.

C. 2

D. 0

Given:

What is the result?

A. The code fails to compile. To make it compile, at line n1 insert: this () { }

B. The code fails to compile. To make it compile, at line n2 insert: this ();

C. The code fails to compile. To make it compile, at line n1 insert: Bus () { }

D. The code compiles and prints: default

luxury

Given the code fragment:

What is the result?

A. 10 20 10 15 20

B. A runtime exception is thrown.

C. 10 20 10 20

D. A compilation error occurs.

Which method identifier is correct according to Java naming conventions?

A. BillCalculator

B. calculateBill

C. calculatebill

D. Calculator

Given the code fragment:

What is the result?

A. 25.67

B. 25.00

C. 25.7

D. 26

Which two components can class declarations include?

A. A list of instance methods

B. The main method

C. Interfaces implemented by the class

D. The public modifier