MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Technical MCQs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A __________ will be visible only within a function where it is defined. |
| A. | global variables |
| B. | local variable |
| C. | Both A and B |
| D. | None of the above |
| E. | |
| Answer» C. Both A and B | |
| 2. |
Which of the following statement is true about BitWise OR? |
| A. | It performs a Boolean AND operation on each bit of its integer arguments |
| B. | It is a unary operator and operates by reversing all the bits in the operand. |
| C. | Both A and B |
| D. | It performs a Boolean OR operation on each bit of its integer arguments. |
| Answer» E. | |
| 3. |
Logical AND : If both the operands are non-zero, then the condition becomes true. |
| A. | Yes |
| B. | No |
| C. | Can be yes or no |
| D. | Can not say |
| Answer» B. No | |
| 4. |
Which operator checks if the value of the left operand is greater than the value of the right operand? |
| A. | Equal |
| B. | Greater than |
| C. | Less than |
| D. | Greater than or Equal to |
| Answer» C. Less than | |
| 5. |
which operator outputs the remainder of an integer division? |
| A. | Add |
| B. | Subtraction |
| C. | Modulus |
| D. | Increment |
| Answer» D. Increment | |
| 6. |
State whether the following statements are True or False for strict equality operator(= = =). i) If the two values have different types they are equal. ii) If both values are null or both values are undefined, they are equal. |
| A. | True True |
| B. | False False |
| C. | True False |
| D. | False True |
| Answer» E. | |
| 7. |
If an operator is NaN or converts to NaN, what wil comparison operator always returns ? |
| A. | True |
| B. | False |
| C. | Undefined |
| D. | NAN |
| Answer» C. Undefined | |
| 8. |
What will be the output if we compare "ten" and 10 with less then comparison operator("ten" |
| A. | True |
| B. | False |
| C. | undefined |
| D. | error |
| Answer» C. undefined | |
| 9. |
If var A={B:3, C:5}, how to use the delete operator to delete one of the properties of an object. |
| A. | delete |
| B. | delete A |
| C. | delete A.B |
| D. | delete A[0] |
| Answer» D. delete A[0] | |
| 10. |
which operator evaluates its operands, then discards the value and returns undefined? |
| A. | In |
| B. | Comparison |
| C. | Eval |
| D. | Void |
| Answer» E. | |
| 11. |
If the operator value is null, then the unary operator returns the typeof _________. |
| A. | undefined |
| B. | object |
| C. | boolean |
| D. | string |
| Answer» C. boolean | |
| 12. |
When using comparative operators,if after object to primitive conversion, at least one operand is not a string, both operands are converted to? |
| A. | String |
| B. | Boolean |
| C. | Number |
| D. | Object |
| Answer» D. Object | |
| 13. |
Which operator will return false if two value are equal? |
| A. | ! |
| B. | != |
| C. | !== |
| D. | All of the above |
| Answer» C. !== | |
| 14. |
Which operator is known as the strict equality operator, which checks whether its two operators are identical or not? |
| A. | = |
| B. | == |
| C. | === |
| D. | && |
| Answer» D. && | |
| 15. |
Which operator is known as the equality operator, which checks whether its two operators are "equal"? |
| A. | = |
| B. | == |
| C. | === |
| D. | && |
| Answer» C. === | |