From which language did C++ directly evolve?
a. A
b. Ada
c. C
d. C+
e. C-
c. C
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A train protection system automatically applies the brakes of a train if the speed limit for a segment of track is exceeded, or if the train enters a track segment that is currently signaled with a red light (i.e. the segment should not be entered). Giving reasons for your answer, chose a reliability metric that might be used to specify the required reliability for such a system.
What will be an ideal response?
A server manages the objects a1, a2,... an. The server provides two operations for its clients:
Read (i) returns the value of 
Write(i, Value) assigns Value to
The transactions T, U and V are defined as follows:
T: x= Read (i); Write(j, 44);
U: Write(i, 55);Write(j, 66);
V: Write(k, 77);Write(k, 88);
Describe the information written to the log file on behalf of these three transactions if strict two-phase locking is in use and U acquires ai and aj before T. Describe how the recovery manager would use this information to recover the effects of T, U and V when the server is replaced after a crash. What is the significance of the order
of the commit entries in the log file?
Describe what relationship types represent in an ER model and provide examples of unary, binary, ternary, and quaternary relationships.
What will be an ideal response?
Write a shell script that operates in the background on two machines and ensures that the contents of a named directory on one machine is always a mirror image of another named directory on the other machine.
What will be an ideal response?