McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Science in Information Technology TY (BSc IT) , Bachelor of Science in Information Technology (BSc IT) , Bachelor of Science in Computer Science (BSc CS) .
| 51. |
What are the three different types of message arrows? |
| A. | synchronous, asynchronous, asynchronous with instance creation |
| B. | self, multiplied,instance generator |
| C. | synchronous, asynchronous, synchronous with instance creation |
| D. | none of the mentioned |
| Answer» C. synchronous, asynchronous, synchronous with instance creation | |
| Explanation: three different types of message arrows are- synchronous, asynchronous, synchronous with instance creation. | |
| 52. |
Which of these are true with respect to the message arrows? |
| A. | the synchronous message arrow is used when a sending individual continues execution after sending the message |
| B. | the asynchronous message arrow is used when a sending individual suspends execution after sending the message |
| C. | the dashed arrow is used either to show the return of control from a synchronous message or to create a new entity |
| D. | all of the mentioned |
| Answer» C. the dashed arrow is used either to show the return of control from a synchronous message or to create a new entity | |
| Explanation: the asynchronous message arrow is used when a sending individual continues execution after sending the message and the synchronous message arrow is used when a sending individual suspends execution after sending the message. | |
| 53. |
When is the operation executing, suspended and active? |
| A. | an operation is executing when some process is actually running its code |
| B. | an operation is suspended when it sends a synchronous message and it is waiting for the message to return |
| C. | an operation is active when it is either executing or suspended |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all of the mentioned statements are true and respond to operations executing, suspended and active states. | |
| 54. |
What is break fragment? |
| A. | an fragment which has one or more guarded operands whose guards are mutually exclusive—that is, at most one of them can be true at any time |
| B. | a fragment which has a single operand that is performed instead of the remainder of the enclosing fragment or diagram if the operand guard is true |
| C. | a fragment which has a single operand that may or may not have a guard |
| D. | none of the mentioned |
| Answer» B. a fragment which has a single operand that is performed instead of the remainder of the enclosing fragment or diagram if the operand guard is true | |
| Explanation: a break fragment has a single operand that is performed instead of the remainder of the enclosing fragment or diagram if the operand guard is true. | |
| 55. |
What are the heuristics which sequencing diagram follows? |
| A. | put pairs of lifelines that interact heavily next to one another |
| B. | position lifelines to make message arrows as short as possible |
| C. | position lifelines to make message arrows go from left to right |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: sequencing diagram follows all the mentioned heuristics. | |
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