Sawaal

 Technology Questions

Popular Latest Rated
Q:

How many of the following will follow JavaBean Listener naming rules?

addListener

addMouseListener

deleteMouseListener

removeMouseListener

registerMouseListener

 

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Java

0 23598
Q:

Which one of the following is not used to generate dynamic web pages ?

A) PHP B) ASP.NET
C) JSP D) none of the mentioned
 
Answer & Explanation Answer: D) none of the mentioned

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Web Technology
Job Role: Analyst

21 23561
Q:

What is function prototyping? What are its advantages?

Answer

Function prototyping is a function declaration statement that tells the compiler about the return type of the function and the number as well as type of arguments required by the function at the time of calling it.


Syntax:


return_type function_name( type1 arg1, type 2 arg2, ... );


 


Advantages of function prototype :


- It helps the compiler in determining whether a function is called correctly or not. Each time when a function is called, its calling statement is compared with its prototype. In case of any mismatch, compiler reports an error.


- A function must be defined before calling it. But prototyping allows a function to be called before defining it.

Report Error

View answer Workspace Report Error Discuss

Subject: C++

37 23334
Q:

public abstract class Shape {

private int x;

private int y;

public abstract void draw();

public void setAnchor(int x, int y) {

this.x = x;

this.y = y;

}

}

Which two classes use the Shape class correctly?

A) public class Circle implements Shape { private int radius; B) public abstract class Circle extends Shape { private int radius; }
C) public class Circle extends Shape { private int radius; public void draw(); D) None
 
Answer & Explanation Answer: B) public abstract class Circle extends Shape { private int radius; }

Explanation:

Only B is true

Report Error

View Answer Report Error Discuss

Filed Under: Java

0 22746
Q:

Which of the following statements are equal for a variable declared in the interface ?

1. int X=10
2. public int X=10
3. public static final int X=10

A) Only 1 and 2 are equal B) Only 2 and 3 are equal
C) All are unequal D) All are equal
 
Answer & Explanation Answer: D) All are equal

Explanation:

All the statements are equal because inside an interface a variable declared will be public static final by default 

Report Error

View Answer Report Error Discuss

Filed Under: Java
Job Role: IT Trainer

0 22737
Q:

Which of the following gives the memory address of the first element in array?

A) array[0]; B) array[1];
C) array(2); D) array;
 
Answer & Explanation Answer: D) array;

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: C++

23 22615
Q:

A lock can be acquired on a class.

The above statement is

A) True B) False
C) Both A and B D) None
 
Answer & Explanation Answer: A) True

Explanation:

A lock can be acquired on a class. This lock is acquired on the class's Class object.

Report Error

View Answer Report Error Discuss

Filed Under: Java

0 21905
Q:

What is the output of this program ?

       #include
        using namespace std;
        int n(char, int);
        int (*p) (char, int) = n;
        int main()
        {
            (*p)('d', 9);
            p(10, 9);
            return 0;
        }
        int n(char c, int i)
        {
            cout << c <<  i;
            return 0;
        }

A) d99 B) d9d9
C) d9 D) compile time error
 
Answer & Explanation Answer: A) d99

Explanation:

In this program, we have declared the values as integer instead of character, So it is printing as d99 but it will not arise an error.

Report Error

View Answer Report Error Discuss

Filed Under: C++

3 20215