GATE Questions

Q:

What is the difference between stack and array?

Answer

Stack:


 - Stack is a ordered collection of items


 - Stack is a dynamic object whose size is constantly changing as items are pushed and popped .


 - Stack may contain different data types


Array:


- Array is an ordered collection of items


- Array is a static object i.e. no of item is fixed and is assigned by the declaration of the array


- It contains same data types.

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Subject: C++ - Technology Exam Prep: GATE

8 2980
Q:

Which among the following are not the c++ tokens

A) Identifiers B) keywords
C) Strings D) None
 
Answer & Explanation Answer: D) None

Explanation:

All the above listed options are c++ tokens .They  include:

             - keywords

             - Identifiers

             - Constants

             - Strings

             - operators

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Filed Under: C++ - Technology
Exam Prep: GATE

2 891
Q:

Explain fork() system call?

Answer

The `fork()’ used to create a new process from an existing process. The new process is called the child process, and the existing process is called the parent. We can tell which is which by checking the return value from `fork()’. The parent gets the child’s pid returned to him, but the child gets 0 returned to him.

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Subject: Operating Systems Exam Prep: GATE

1 882
Q:

The PS command prints the process status for only some of the running processes.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

The PS command prints the process status for some or all of the running processes

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Subject: Operating Systems
Exam Prep: GATE

1
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

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