Single Dimensional Array - Quiz

Q: An array elements are always stored in ________ memory locations.

A. Sequential
B. Random
C. Sequential and Random
D. None of the above

Correct Option: A
Remarks:

Explanation: <p>Answer: Option A </p> <p>An array in C or C++ is a collection of items stored at contiguous memory locations and elements can be accessed randomly using indices of an array. They are used to store similar type of elements as in the data type must be the same for all elements. They can be used to store collection of primitive data types such as int, float, double, char, etc of any particular type. To add to it, an array in C or C++ can store derived data types such as the structures, pointers etc.</p>

Q: let x be an array. Which of the following operations is illegal?

I.   ++x
II. x+1
III. x++
IV. x*2

A. I and II
B. I, II and III
C. II and III
D. I, III and IV

Correct Option: D
Remarks:

Explanation: Option D

Q: Consider the following type definition.

<span class="pln">
</span><span class="kwd">typedef</span><span class="pln"> </span><span class="kwd">char</span><span class="pln"> x</span><span class="pun">[</span><span class="lit">10</span><span class="pun">];</span><span class="pln">
x myArray</span><span class="pun">[</span><span class="lit">5</span><span class="pun">];</span><span class="pln">
</span>

What will sizeof(myArray) be ? (Assume one character occupies 1 byte)

A. 15
B. 10
C. 50
D. 30

Correct Option: C
Remarks:

Explanation: 50

Q: What will be the output of the following program?

<span class="pln">
</span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">()</span><span class="pln">
</span><span class="pun">{</span><span class="pln">
      </span><span class="kwd">char</span><span class="pln"> str1</span><span class="pun">[]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="str">"abcd"</span><span class="pun">;</span><span class="pln">
      </span><span class="kwd">char</span><span class="pln"> str2</span><span class="pun">[]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="str">"abcd"</span><span class="pun">;</span><span class="pln">
      </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">str1</span><span class="pun">==</span><span class="pln">str2</span><span class="pun">)</span><span class="pln">
            printf</span><span class="pun">(</span><span class="str">"Equal"</span><span class="pun">);</span><span class="pln">
      </span><span class="kwd">else</span><span class="pln">
            printf</span><span class="pun">(</span><span class="str">"Unequal"</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span>

A. Equal
B. Unequal
C. Error
D. None of these.

Correct Option: B
Remarks:

Explanation: Unequal

Q: What will be the output of the program if the array begins at 65472 and each integer occupies 2 bytes?

<span class="pln">
</span><span class="com">#include</span><span class="pln">
</span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">()</span><span class="pln">
</span><span class="pun">{</span><span class="pln">
    </span><span class="kwd">int</span><span class="pln"> a</span><span class="pun">[</span><span class="lit">3</span><span class="pun">][</span><span class="lit">4</span><span class="pun">]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="pun">{</span><span class="lit">1</span><span class="pun">,</span><span class="pln"> </span><span class="lit">2</span><span class="pun">,</span><span class="pln"> </span><span class="lit">3</span><span class="pun">,</span><span class="pln"> </span><span class="lit">4</span><span class="pun">,</span><span class="pln"> </span><span class="lit">4</span><span class="pun">,</span><span class="pln"> </span><span class="lit">3</span><span class="pun">,</span><span class="pln"> </span><span class="lit">2</span><span class="pun">,</span><span class="pln"> </span><span class="lit">1</span><span class="pun">,</span><span class="pln"> </span><span class="lit">7</span><span class="pun">,</span><span class="pln"> </span><span class="lit">8</span><span class="pun">,</span><span class="pln"> </span><span class="lit">9</span><span class="pun">,</span><span class="pln"> </span><span class="lit">0</span><span class="pun">};</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"%u, %u"</span><span class="pun">,</span><span class="pln"> a</span><span class="pun">+</span><span class="lit">1</span><span class="pun">,</span><span class="pln"> </span><span class="pun">&amp;</span><span class="pln">a</span><span class="pun">+</span><span class="lit">1</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span>

A. 65474, 65488
B. 65480, 65488
C. 65480, 65496
D. 65474, 65476

Correct Option: C
Remarks:

Explanation: 65480, 65496

Q: What will be the output of the program?

<span class="pln">
</span><span class="com">#include</span><span class="str">&lt;stdio.h&gt;</span><span class="pln">
</span><span class="kwd">int</span><span class="pln"> main</span><span class="pun">()</span><span class="pln">
</span><span class="pun">{</span><span class="pln">
    </span><span class="kwd">int</span><span class="pln"> arr</span><span class="pun">[</span><span class="lit">1</span><span class="pun">]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="pun">{</span><span class="lit">10</span><span class="pun">};</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"%d"</span><span class="pun">,</span><span class="pln"> </span><span class="lit">0</span><span class="pun">[</span><span class="pln">arr</span><span class="pun">]);</span><span class="pln">
    </span><span class="kwd">return</span><span class="pln"> </span><span class="lit">0</span><span class="pun">;</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span>

A. 1
C. 10
D. None of these

Correct Option: C
Remarks:

Explanation: 10

Q: What will be the output of the program if the array begins at address 65486?

<span class="pln">
</span><span class="com">#include</span><span class="str">&lt;stdio.h&gt;</span><span class="pln">
</span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">()</span><span class="pln">
</span><span class="pun">{</span><span class="pln">
    </span><span class="kwd">int</span><span class="pln"> arr</span><span class="pun">[]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="pun">{</span><span class="lit">12</span><span class="pun">,</span><span class="pln"> </span><span class="lit">14</span><span class="pun">,</span><span class="pln"> </span><span class="lit">15</span><span class="pun">,</span><span class="pln"> </span><span class="lit">23</span><span class="pun">,</span><span class="pln"> </span><span class="lit">45</span><span class="pun">};</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"%u, %u"</span><span class="pun">,</span><span class="pln"> arr</span><span class="pun">,</span><span class="pln"> </span><span class="pun">&amp;</span><span class="pln">arr</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span>

A. 65486, 65488
B. 65486, 65490
C. 65486, 65487
D. 65486, 65486

Correct Option: D
Remarks:

Explanation: 65486, 65486

Q: What will be the output of the program?

<span class="pln">
</span><span class="com">#include</span><span class="str">&lt;stdio.h&gt;</span><span class="pln">
</span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">()</span><span class="pln">
</span><span class="pun">{</span><span class="pln">
    </span><span class="kwd">float</span><span class="pln"> arr</span><span class="pun">[]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="pun">{</span><span class="lit">12.4</span><span class="pun">,</span><span class="pln"> </span><span class="lit">2.3</span><span class="pun">,</span><span class="pln"> </span><span class="lit">4.5</span><span class="pun">,</span><span class="pln"> </span><span class="lit">6.7</span><span class="pun">};</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"%d"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">arr</span><span class="pun">)/</span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">arr</span><span class="pun">[</span><span class="lit">0</span><span class="pun">]));</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span>

A. 5
B. 4
C. 6
D. no output

Correct Option: B
Remarks:

Explanation: 4

Q: Which of the following is correct way to define the function fun() in the below program?

<span class="pln">
</span><span class="com">#include</span><span class="str">&lt;stdio.h&gt;</span><span class="pln">
</span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">()</span><span class="pln">
</span><span class="pun">{</span><span class="pln">
    </span><span class="kwd">int</span><span class="pln"> a</span><span class="pun">[</span><span class="lit">3</span><span class="pun">][</span><span class="lit">4</span><span class="pun">];</span><span class="pln">
    fun</span><span class="pun">(</span><span class="pln">a</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span>

A. void fun(int p[][4]){}
B. void fun(int *p[4]){}
C. void fun(int *p[][4]){}
D. void fun(int *p[3][4]){}

Correct Option: A
Remarks:

Explanation: void fun(int p[][4]){}

Q: Which of the following statements are correct about an array?

1. The array int num[26]; can store 26 elements.
2. The expression num[1] designates the very first element in the array.
3. It is necessary to initialize the array at the time of declaration.
4. The declaration num[SIZE] is allowed if SIZE is a macro.

A. 1
B. 1, 4
C. 2, 3
D. 2, 4

Correct Option: B
Remarks:

Explanation: 1, 4

Single Dimensional Array - Quiz

An array elements are always stored in ________ memory locations.

let x be an array. Which of the following operations is illegal? I. ++x II. x+1 III. x++ IV. x*2

let x be an array. Which of the following operations is illegal?
I. ++x II. x+1 III. x++ IV. x*2