Tuesday, September 5, 2017

Kerala PSC HSST Computer Science Previous Questions - Set 2

Answers given at the end.

Q1. The solution to the count-to-infinity problem in which a router never advertises the cost of a destination to its neighbour N, if N is the next hop to that destination, is called:
(A) Triggered update
(B) Source tracing
(C) Split-horizon
(D) Path vector

Q2. A compiler which runs on one machine and produces target code for another is called a:
(A) Bootstrapping compiler
(B) Just-in-time compiler
(C) Cross compiler
(D) Optimizing compiler

Q3.Which among the following is an interior routing protocol?
(A) OSPF
(B) EGP
(C) BGP
(D) NNTP

Q4. The maximum length (in bytes) of an IP packet:
(A) 255
(B) 1023
(C) 32767
(D) 65535

Q5. Which among the following is not a type of HTTP request?
(A) GET
(B) HEAD
(C) RELEASE
(D) POST

Q6. Which among the following is not a real time operating system?
(A) RT-Linux
(B) VxWorks
(C) Solaris
(D) Lynx

Q7. What is returned by a fork() call to the child process?
(A) 0
(B) Process-id-pf parent
(C) Process-id of child
(D) -1

Q8. The degree of multiprogramming is controlled primarily by?
(A) Short-term scheduler
(B) Medium-term scheduler
(C) Long-term scheduler
(D) Disk scheduler

Q9. Which of the following is a high-level synchronization concept?
(A) Interrupt
(B) Semaphore
(C) Mutex
(D) Monitor

Q10. Paging solves the problem of:
(A) Thrashing
(B) Page faults
(C) Internal fragmentation
(D) External Fragmentation





ANSWERS
Q1: (C)
In computer networking, split-horizon route advertisement is a method of preventing routing loops in distance-vector routing protocols by prohibiting a router from advertising a route back onto the interface from which it was learned.

Q2: (C)
For example, a compiler that runs on a Windows PC but generates code that runs on Android smartphone is a cross compiler.

Q3: (A)

Q4: (D)

Q5: (C)

Q6: (C)

Q7: (A)
In child process fork() returns 0 whereas in parent process fork() returns the PID (process id) of the new process created.

Q8: (C)
Long Term Scheduler is also known as a job scheduler. Short Term Scheduler is also called CPU scheduler. and its main objective is to increase system performance.

Q9: (D)

Q10: (D)

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