Interview Questions

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:
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Filed Under: C++ - Technology

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Q:

What is RDBMS? Explain its features.

Answer

RDBMS is a database management system based on relational model defined by E.F.Codd. Data is stored in the form of rows and columns. The relations among tables are also stored in the form of the table.

Features:
- Provides data to be stored in tables
- Persists data in the form of rows and columns
- Provides facility primary key, to uniquely identify the rows
- Creates indexes for quicker data retrieval
- Provides a virtual table creation in which sensitive data can be stored and simplified query can be applied.(views)
- Sharing a common column in two or more tables(primary key and foreign key)
- Provides multi user accessibility that can be controlled by individual users

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Subject: Oracle - Technology

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Q:

main() {

int i;

printf("%d",scanf("%d",&i)); // value 10 is given as input here

}

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

Explanation:

Scanf returns number of items successfully read and not 1/0. Here 10 is given as input which should have been scanned successfully. So number of items read is 1.

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Filed Under: Java - Technology

2 23679
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.

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Subject: C++ - Technology

36 23415
Q:

What is a Non-PO Invoice?

Answer

A non-po is an invoice which does not have po(purchase order).However, these invoices requires approval for authorized person/persons to process for payment.


What_is_a_Non-PO_Invoice1558075538.jpg image

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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:
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Filed Under: Web Technology - Technology
Job Role: Analyst

18 22861
Q:

What is the output of this program ?

class main_arguments {
            public static void main(String [ ] args)
            {
                String [][] argument = new String[2][2];
                int x;
                argument[0] = args;
                x = argument[0].length;
                for (int y = 0; y < x; y++)
                    System.out.print(" " + argument[0][y]);           
            }
        }

A) 1 1 B) 1 0
C) 1 0 3 D) 1 2 3
 
Answer & Explanation Answer: D) 1 2 3

Explanation:

In argument[0] = args;, the reference variable arg[0], which was referring to an array with two elements, is reassigned to an array (args) with three elements.
Output:
$ javac main_arguments.java
$ java main_arguments
1 2 3

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Filed Under: Java - Technology
Exam Prep: GATE

0 22523
Q:

Which is more effective while calling the functions?

A) call by value B) call by reference
C) call by pointer D) none
 
Answer & Explanation Answer: B) call by reference

Explanation:

In the call by reference, it will just copy the address of the variable to access it, so it will reduce the memory in accessing it.

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Filed Under: C++ - Technology

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