Technical Questions

Q:

What resources are used when a thread is created? How do they differ from those when a process is created?

Answer

When a thread is created the threads does not require any new resources to execute the thread shares the resources like memory of the process to which they belong to. The benefit of code sharing is that it allows an application to have several different threads of activity all within the same address space. Whereas if a new process creation is very heavyweight because it always requires new address space to be created and even if they share the memory then the inter process communication is expensive when compared to the communication between the threads.

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Q:

 For what purposes are views used?

A) To hide rows only B) To hide columns only
C) To hide complicated SQL statements only D) All of the above are uses for SQL views.
 
Answer & Explanation Answer: D) All of the above are uses for SQL views.

Explanation:
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Q:

________ is an open source DBMS product that runs on UNIX, Linux and Windows.

A) MySQL B) JSP/SQL
C) JDBC/SQL D) Sun ACCESS
 
Answer & Explanation Answer: A) MySQL

Explanation:
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Q:

If the following program (myprog) is run from the command line as 

myprog 1 2 3 

what would be the output?

main(int argc, char *argv[])

{

    int i, j = 0;

    for (i = 0; i < argc ; i++)

           j = j + atoi ( argv[i]);

    printf ("%d", j);

}

A) 123 B) 6
C) Error D) "123"
 
Answer & Explanation Answer: B) 6

Explanation:

When atoi() tries to convert argv[0] to a number it cannot do so (argv[0] being a file name) and hence returns a zero.

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Q:

What is the output of this C code?

        #include <stdio.h>
        void main()
        {
            int y = 3;
            int x = 5 % 2 * 3 / 2;
            printf("Value of x is %d", x);
        }

A) Value of x is 1 B) Value of x is 2
C) Value of x is 3 D) Compile time error
 
Answer & Explanation Answer: A) Value of x is 1

Explanation:
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Q:

List out some reasons for process termination.

Answer

- Normal completion


- Time limit exceeded


- Memory unavailable


- Bounds violation


- Protection error


- Arithmetic error


- Time overrun


- I/O failure


- Invalid instruction


- Privileged instruction


- Data misuse


- Operator or OS intervention


- Parent termination.

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Q:

Which address identifies a process on a host?

A) Port B) Physical
C) IP D) All of the above
 
Answer & Explanation Answer: A) Port

Explanation:
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Q:

 What is the output of this C code? 

        #include <stdio.h>
        void m()
        {
            printf("hi");
        }
        void main()
        {
            m();
        }

A) hi B) Run time error
C) None D) Varies
 
Answer & Explanation Answer: A) hi

Explanation:
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