- Aint
- Bfloat
- C double
- DThere is no type for an assignment expression
Assignment Operators - Quiz
- A =
- B ==
- C :=
- D =>
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Assignment Operators - Quiz
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Time Taken: Questions: Answered: Not Answered:
Correct Answer:
Wrong Answer:
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- A. int
- B. float
- C. double
- D. There is no type for an assignment expression
Remarks:
Explanation: Option A
- A. =
- B. ==
- C. :=
- D. =>
Remarks:
Explanation:
The assignment operator (=) in Java is used to assign a value to a variable. It takes the value on the right-hand side and assigns it to the variable on the left-hand side.
The assignment operator in Java is =. Here's an example:
<span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">AssignmentExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="com">// Assigning value to a variable</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> number </span><span class="pun">=</span><span class="pln"> </span><span class="lit">42</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Displaying the value</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"The value of number is: "</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> number</span><span class="pun">);</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span>
In this example, the value 42 is assigned to the variable number using the assignment operator (=). When you run this Java program, it will output "The value of number is: 42".
- A. 0
- B. 5
- C. 10
- D. 15
Remarks:
Explanation:
The assignment operator (=) in Java is used to assign a value to a variable. In this case, x = 10 assigns the value 10 to the variable x.
<span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">AssignmentExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="com">// Declare a variable</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> x</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Assign a value to the variable</span><span class="pln"> x </span><span class="pun">=</span><span class="pln"> </span><span class="lit">10</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Display the value of x</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"The value of x is: "</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> x</span><span class="pun">);</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span>
When you run this Java program, it will output "The value of x is: 10". This demonstrates the assignment of the value 10 to the variable x.
- A. 10
- B. 21
- C. 4
- D. 7
Remarks:
Explanation:
In Java, the expression y += z is a compound assignment operator, which adds the value of z to the current value of y and assigns the result back to y. It is equivalent to the expression y = y + z.
If y is initially 7 and z is 3, the result of the expression y += z would be:
<span class="pln"> y </span><span class="pun">=</span><span class="pln"> y </span><span class="pun">+</span><span class="pln"> z</span><span class="pun">;</span><span class="pln"> </span>
After the operation, the value of y will be 10 (7 + 3).
Here's an example in Java:
<span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">CompoundAssignmentExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="com">// Declare variables</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> y </span><span class="pun">=</span><span class="pln"> </span><span class="lit">7</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> z </span><span class="pun">=</span><span class="pln"> </span><span class="lit">3</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Compound assignment</span><span class="pln"> y </span><span class="pun">+=</span><span class="pln"> z</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Display the result</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"The value of y after y += z is: "</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> y</span><span class="pun">);</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span>
When you run this Java program, it will output "The value of y after y += z is: 10".
- A. 0
- B. 1
- C. 2
- D. 4
Remarks:
Explanation:
In Java, the expression p /= 2 is a compound assignment operator, which divides the value of p by 2 and assigns the result back to p. It is equivalent to the expression p = p / 2.
If p is initially some numeric value, the result of the expression p /= 2 would be:
<span class="pln"> p </span><span class="pun">=</span><span class="pln"> p </span><span class="pun">/</span><span class="pln"> </span><span class="lit">2</span><span class="pun">;</span><span class="pln"> </span>
Here's an example in Java:
<span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">CompoundAssignmentExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="com">// Declare variable</span><span class="pln"> </span><span class="kwd">double</span><span class="pln"> p </span><span class="pun">=</span><span class="pln"> </span><span class="lit">10.0</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Compound assignment</span><span class="pln"> p </span><span class="pun">/=</span><span class="pln"> </span><span class="lit">2</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Display the result</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"The value of p after p /= 2 is: "</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> p</span><span class="pun">);</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span>
In this example, if p is initially 10.0, after the operation, the value of p will be 5.0 (10.0 / 2).
- A. 5
- B. 11
- C. 24
- D. 2
Remarks:
Explanation:
In Java, the expression q -= r is a compound assignment operator, which subtracts the value of r from q and assigns the result back to q. It is equivalent to the expression q = q - r.
If q is initially some numeric value and r is another numeric value, the result of the expression q -= r would be:
<span class="pln"> q </span><span class="pun">=</span><span class="pln"> q </span><span class="pun">-</span><span class="pln"> r</span><span class="pun">;</span><span class="pln"> </span>
Here's an example in Java:
<span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">CompoundAssignmentExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="com">// Declare variables</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> q </span><span class="pun">=</span><span class="pln"> </span><span class="lit">8</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> r </span><span class="pun">=</span><span class="pln"> </span><span class="lit">3</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Compound assignment</span><span class="pln"> q </span><span class="pun">-=</span><span class="pln"> r</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Display the result</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"The value of q after q -= r is: "</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> q</span><span class="pun">);</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span>
In this example, if q is initially 8 and r is 3, after the operation, the value of q will be 5 (8 - 3).
- A. 0
- B. 1
- C. 2
- D. 3
Remarks:
Explanation:
In Java, the expression b >>= c is a compound assignment operator that performs a right shift on the variable b by the number of bits specified on the right side of the >>= operator. It is equivalent to the expression b = b >> c.
Here's an example in Java:
<span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">CompoundAssignmentExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="com">// Declare variables</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> b </span><span class="pun">=</span><span class="pln"> </span><span class="lit">12</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> c </span><span class="pun">=</span><span class="pln"> </span><span class="lit">2</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Compound assignment (right shift by 2 bits)</span><span class="pln"> b </span><span class="pun">>>=</span><span class="pln"> c</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Display the result</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"The value of b after b >>= c is: "</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> b</span><span class="pun">);</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span>
In this example, if b is initially 12, after the operation, the value of b will be 3. This is because the binary representation of 12 is 1100, and right-shifting it by 2 bits results in 0011, which is 3 in decimal.
- A. 0
- B. 1
- C. 5
- D. 10
Remarks:
Explanation:
In Java, the expression m &= 5 is a compound assignment operator that performs a bitwise AND between the variable m and the value 5. It is equivalent to the expression m = m & 5.
Here's an example in Java:
<span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">CompoundAssignmentExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="com">// Declare variables</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> m </span><span class="pun">=</span><span class="pln"> </span><span class="lit">10</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Compound assignment (bitwise AND with 5)</span><span class="pln"> m </span><span class="pun">&=</span><span class="pln"> </span><span class="lit">5</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Display the result</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"The value of m after m &= 5 is: "</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> m</span><span class="pun">);</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span>
In this example, if m is initially 10, after the operation, the value of m will be 0. This is because the binary representation of 10 is 1010, and performing a bitwise AND with 5 (binary 0101) results in 0000, which is 0 in decimal.
- A. 1<br>2
- B. -1<br>4
- C. 0<br>4
- D. 1<br>3
Remarks:
Explanation:
<span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">PostAndPre</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</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="typ">String</span><span class="pln"> args</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="pln"> </span><span class="lit">2</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> b </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"> a</span><span class="pun">++;</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="pln">b</span><span class="pun">);</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</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><span class="pun">}</span>
- A. -1 Now a = 3
- B. -1 Now a = 4
- C. 1 Now a = 4
- D. -1 Now a = 5
Remarks:
Explanation:
<span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">PostAndPre</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</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="typ">String</span><span class="pln"> args</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="pln"> </span><span class="lit">2</span><span class="pun">;</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</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"> a</span><span class="pun">++</span><span class="pln"> </span><span class="pun">+</span><span class="str">" Now a = "</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><span class="pun">}</span>
<span class="pln"> </span><span class="pun">-</span><span class="lit">1</span><span class="pln"> </span><span class="typ">Now</span><span class="pln"> a </span><span class="pun">=</span><span class="pln"> </span><span class="lit">4</span>