Today's Discussion: 22/09//2017 : Topic : Operating System

Q.The strategy of making processes that are logically runnable to be temporarily suspended is called :
a) Non preemptive scheduling
b) Preemptive scheduling
c) Shortest job first
d) First come First served

Answer: B



Q1.YACC is a....
A. lexical analyser  generator
B.parser generator
C.macro pre- processor
D. Code optimizer

Answer: B
A parser generator that works for all grammars without any restrictions. Accent can be used like Yacc and it cooperates with Lex.



Q2. The _______ table is created by YACC.
a) LALR parsing
b) LL parsing
c) GLR parsing
d) None of the mentioned

Answer: A


Q3.Which command is used to display the end of the file
a) head-r  
b) eof
c) tail          
d) bof

Answer: C


Q4. Which among the following is a clipping algorithm?
A) kruskal's
B) Cohen - Sutherland
C) Dijkstra's.
D) prim's

Answer: B


Q5. cache memory is made of

a.DRAM
b.SRAM
c.RAM
d.PROM

Answer: B



Q6. White Box techniques are also classified as

a) Design based testing
b) Structural testing
c) Error guessing technique
d) None of these


Answer: b
Explanation: The structural testing is the testing of the structure of the system or component. Structural testing is often referred to as ‘white box’ or ‘glass box’ or ‘clear-box testing’ because in structural testing we are interested in what is happening ‘inside the system/application’.


Q7.A page fault

A. Is an error in a specific page
B.occurs when a program accesses a page of memory
C. Is an access to a page not currently in memory
D. None of the above


Q8.In which of the following page replacement policies,Balady's anomaly occurs...

A. FIFO
B. LRU
C. LFU
D. NRU

Answer: A



Q9. NAND & NOR are considered to be Universal gates because they are capable of performing the logical functionalities concerned to
a. AND gate
b. OR gate
c. NOT gate
d. All of the above

Answer: d


Gk Today

Who has been appointed as new Indian High Commissioner to Pakistan?
[A] Ajay Bisaria
[B] Gautam Bambawale
[C] Satish Chandra
[D] Sharat Sabharwal

 Answer: A



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