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Welcome to the Deciphering Program Data MCQs Page

Dive deep into the fascinating world of Deciphering Program Data with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Deciphering Program Data, a crucial aspect of Reverse Engineering. In this section, you will encounter a diverse range of MCQs that cover various aspects of Deciphering Program Data, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Reverse Engineering.

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Deciphering Program Data MCQs | Page 9 of 11

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Q81.
What advantage does a doubly linked list have over a singly linked list?

a.

Doubly linked lists take up less memory than singly linked lists.

b.

Doubly linked lists make it easier to add items to the list.

c.

Doubly linked lists make it easier to delete an item from the middle of the list.

d.

Singly linked lists are faster than doubly linked lists.

Discuss
Answer: (c).Doubly linked lists make it easier to delete an item from the middle of the list. Explanation:The presence of a "previous" pointer in each item of a doubly linked list makes it easier to delete an item from the middle of the list, which is not a trivial operation with singly linked lists.
Q82.
What does the "previous" pointer in a doubly linked list point to?

a.

The next item in the list.

b.

The previous item in the list.

c.

The head of the list.

d.

The tail of the list.

Discuss
Answer: (b).The previous item in the list. Explanation:The "previous" pointer in each item of a doubly linked list points to the previous item in the list.
Q83.
Can programs traverse a doubly linked list backward?

a.

Yes

b.

No

c.

May be Yes or No

d.

Can't say

Discuss
Answer: (a).Yes Explanation:Programs can traverse a doubly linked list backward (toward the beginning of the list) by following the "previous" pointers in each item.
Q84.
What is a binary tree?

a.

A linked list

b.

An array

c.

A compromise between a linked list and an array

d.

A combination of a stack and a queue

Discuss
Answer: (c).A compromise between a linked list and an array Explanation:A binary tree is essentially a compromise between a linked list and an array.
Q85.
What advantage do trees have over arrays?

a.

Trees make items easily accessible

b.

Trees provide the ability to quickly add and remove items

c.

Both a and b

d.

Trees do not have any advantages over arrays

Discuss
Answer: (c).Both a and b Explanation:Trees provide the ability to quickly add and remove items, like linked lists, and make items easily accessible, though not as easily as with a regular array.
Q86.
What are the two pointers usually found in a binary tree item?

a.

“Next” and “previous”

b.

“Top” and “bottom”

c.

“Left-hand” and “right-hand”

d.

“Up” and “down”

Discuss
Answer: (c).“Left-hand” and “right-hand” Explanation:A binary tree item usually contains two pointers: the “left-hand” pointer that points to an item or group of items of lower or equal indexes and the “right-hand” pointer that points items of higher indexes.
Q87.
What is the advantage of searching through a binary tree?

a.

It is a very efficient method for searching through a large number of items

b.

It is a very inefficient method for searching through a large number of items

c.

It is the only method for searching through a large number of items

d.

None of the above

Discuss
Answer: (a).It is a very efficient method for searching through a large number of items Explanation:When searching a binary tree, the program simply traverses the items and jumps from node to node looking for one that matches the index it’s looking for, which is a very efficient method for searching through a large number of items.
Q88.
What is a class in object-oriented design?

a.

A logical construct that contains a combination of data and code

b.

A programming language used for object-oriented design

c.

A data structure with associated functions

d.

An object-oriented programming concept used for inheritance

Discuss
Answer: (a).A logical construct that contains a combination of data and code Explanation:A class is a logical construct that contains a combination of data and code that operates on that data.
Q89.
Why are classes important in object-oriented languages?

a.

Because they allow for efficient memory management

b.

Because they allow for quick and easy access to data

c.

Because pretty much every aspect of the program revolves around them

d.

Because they provide an easy way to store and retrieve data

Discuss
Answer: (c).Because pretty much every aspect of the program revolves around them Explanation:Classes are important constructs in object-oriented languages because pretty much every aspect of the program revolves around them.
Q90.
What is the purpose of the this pointer in a class?

a.

It is used to access data members of the class

b.

It is used to access methods of the class

c.

It is used to pass a pointer to an instance of the class to a method

d.

It is used to distinguish a class from a regular data structure

Discuss
Answer: (c).It is used to pass a pointer to an instance of the class to a method Explanation:The this pointer is used to pass a pointer to an instance of the class to a method.
Page 9 of 11

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