McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) , Information Technology Engineering (IT) , Electrical Engineering , Civil Engineering , Mechanical Engineering .
Chapters
| 1. |
The value of the expressions 4/(3*(2-1)) and 4/3*(2-1) is the same. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: although the presence of parenthesis does affect the order of precedence, in the case shown above, it is not making a difference. the result of both of these expressions is 1.333333333. hence the statement is true. | |
| 2. |
What will be the value of the following Python expression? 4 + 3 % 5 |
| A. | 4 |
| B. | 7 |
| C. | 2 |
| D. | 0 |
| Answer» B. 7 | |
|
Explanation: the order of precedence is: %,+. Hence the expression above, on simplification results in 4 + 3 = 7. Hence the result is 7. |
|
| 3. |
Which of the following operators has its associativity from right to left? |
| A. | + |
| B. | // |
| C. | % |
| D. | ** |
| Answer» D. ** | |
| Explanation: all of the operators shown above have associativity from left to right, except exponentiation operator (**) which has its associativity from right to left. | |
| 4. |
What will be the value of x in the
|
| A. | 43 |
| B. | 44 |
| C. | 22 |
| D. | 23 |
| Answer» B. 44 | |
|
Explanation: The expression shown above is an example of explicit conversion. It is evaluated as int(43.55+1) = int(44.55) = 44. Hence the result of this expression is 44. |
|
| 5. |
What is the value of the following expression? 2+4.00, 2**4.0 |
| A. | (6.0, 16.0) |
| B. | (6.00, 16.00) |
| C. | (6, 16) |
| D. | (6.00, 16.0) |
| Answer» A. (6.0, 16.0) | |
| Explanation: the result of the expression shown above is (6.0, 16.0). this is because the result is automatically rounded off to one decimal place. | |
| 6. |
Which of the following is the truncation division operator? |
| A. | / |
| B. | % |
| C. | // |
| Answer» C. // | |
| Explanation: // is the operator for truncation division. it is called so because it returns only the integer part of the quotient, truncating the decimal part. for example: 20//3 = 6. | |
| 7. |
What are the values of the following
|
| A. | 64, 512, 64 |
| B. | 64, 64, 64 |
| C. | 512, 512, 512 |
| D. | 512, 64, 512 |
| Answer» D. 512, 64, 512 | |
|
Explanation: Expression 1 is evaluated as: 2**9, which is equal to 512. Expression 2 is evaluated as 8**2, which is equal to 64. The last expression is evaluated as 2**(3**2). This is because the associativity of ** operator is from right to left. Hence the result of the third expression is 512. |
|
| 8. |
What is the value of the following expression? 8/4/2, 8/(4/2) |
| A. | (1.0, 4.0) |
| B. | (1.0, 1.0) |
| C. | (4.0. 1.0) |
| D. | (4.0, 4.0) |
| Answer» A. (1.0, 4.0) | |
| Explanation: the above expressions are evaluated as: 2/2, 8/2, which is equal to (1.0, 4.0). | |
| 9. |
What will be the value of X in the
|
| A. | 30.0 |
| B. | 30.8 |
| C. | 28.4 |
| D. | 27.2 |
| Answer» D. 27.2 | |
|
Explanation: The expression shown above is evaluated as: 2+9*(36-8)/10, which simplifies to give 2+9*(2.8), which is equal to 2+25.2 =27.2. Hence the result of this expression is 27.2. |
|
| 10. |
What will be the output of the following
|
| A. | (1,3) |
| B. | (0,3) |
| C. | (1,0) |
| D. | (3,1) |
| Answer» A. (1,3) | |
| Explanation: the expressions are evaluated as: 4%3 and 6//2 respectively. this results in the answer (1,3). this is because the associativity of both of the expressions shown above is left to right. | |
| 11. |
What will be the value of the following
|
| A. | 5.0 |
| B. | 5 |
| C. | 4.0 |
| D. | 4 |
| Answer» C. 4.0 | |
| Explanation: the above expression is an example of explicit conversion. it is evaluated as: float(4+int(2.39)%2) = float(4+2%2) = float(4+0) = 4.0. hence the result of this expression is 4.0. | |
| 12. |
What will be the value of the following
|
| A. | 3 |
| B. | 7 |
| C. | 77 |
| D. | 0 |
| Answer» B. 7 | |
|
Explanation: The order of precedence is: **, //, +. The expression 4+2**5//10 is evaluated as 4+32//10, which is equal to 4+3 = 7. Hence the result of the expression shown above is 7. |
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| 13. |
The expression 2**2**3 is evaluates as: (2**2)**3. |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: the value of the expression (2**2)**3 = 4**3 = 64. when the expression 2**2**3 is evaluated in python, we get the result as 256, because this expression is evaluated as 2**(2**3). this is because the associativity of exponentiation operator (**) is from right to left and not from left to right. | |
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