# ISRO Scientist/Engineer Question Paper Computer Science 2018

##### 71. Question

A particular parallel program computation requires 100 sec when executed on a single processor. If 40% of this computation is inherently sequential (i.e. will not benefit from additional processors), then theoretically best possible elapsed times of this program running with 2 and 4 processor, respectively, are

Answer

##### 72. Question

Consider the following C code segment

**int f ( int x )**

**{**

**if f ( x< 1 ) return 1;**

**else return ( f(x-1) + g(x) ) ;**

**}**

**int g ( int x )**

**{**

**if ( x< 2 ) return 2 ;**

**else return ( f(x-1) + g(x/2));**

**}**

Of the following, which best describes the growth of f(x) as a function of x ?

Answer

##### 73. Question

For a multi-processor architecture, In which protocol a write transaction is forwarded to only those processors that are known to possess a copy of newly altered cache line ?

Answer

##### 74. Question

Avalanche effect in cryptography

Answer

##### 75. Question

In neural network, the network capacity is defined as

Answer